30th United States Congress

File:Sutters Mill.jpg, origin of the California Gold Rush]]

{{Main|1847 in the United States|1848 in the United States|1849 in the United States}}

• July 1, 1847: United States issued its first postage stamps
• January 24, 1848: Gold found at Sutter's Mill, beginning the California Gold Rush
• January 31, 1848: Washington Monument established
• May 29, 1848: Wisconsin is granted statehood, becoming the 30th state
• February 23, 1848: Former President John Quincy Adams, now a Congressman representing Massachusetts, dies in the Speaker's office after suffering a stroke in the House Chambers.
• July 19, 1848: Seneca Falls Convention
• November 7, 1848: U.S. presidential election, 1848: Whig Zachary Taylor defeated Lewis Cass in the first US presidential election held in every state on the same day.
• 1846–1848: Mexican–American War

{{main|List of United States federal legislation, 1789–1901#1821 to 1831|l1=Major legislation: 30th United States Congress}}

• March 3, 1849: United States Department of the Interior established, sess. 2, ch. 108, {{USStat|9|395}}
• March 3, 1849: Gold Coinage Act, sess. 2, ch. 109, {{USStat|9|397}}

File:Map of Mexico 1847.jpg: the 1847 map used during negotiations of the Treaty of Guadalupe Hidalgo.]]

• February 2, 1848: Treaty of Guadalupe Hidalgo signed, ending the Mexican–American War and ceding to the United States virtually all of what is today the southwest United States.

• May 29, 1848: Wisconsin admitted as the 30th U.S. state, sess. 1, ch. 50, {{USStat|9|235}}
• August 14, 1848: Oregon Territory was formed from territory ceded by Great Britain, sess. 1, ch. 177, {{USStat|9|323}}
• March 3, 1849: Minnesota Territory formed from the Wisconsin Territory, sess. 2, ch. 121, {{USStat|9|403}}

During this congress, two Senate seats were added for the new state of Wisconsin.

{{US Congress party summary

| congress = 30

| party1 = Democratic

| abb1 = D

| seats1_last = 31

| seats1_begin = 34

| seats1_end = 38

| seats1_next = 33

| party2 = Independent Democratic

| partylink2 = Independent Democrat

| abb2 = ID

| seats2_last = 0

| seats2_begin = 1

| seats2_end = 1

| seats2_next = 0

| party3 = Liberty

| partylink3 = Liberty Party (United States, 1840)

| abb3 = L

| seats3_last = 1

| seats3_begin = 0

| seats3_end = 0

| seats3_next = 0

| party4 = Whig

| abb4 = W

| seats4_last = 24

| seats4_begin = 20

| seats4_end = 21

| seats4_next = 25

| seats_vacant_last = 2

| seats_vacant_begin = 3

| seats_vacant_end = 0

| seats_vacant_next = 2

}}

During this congress, two House seats were added for the new state of Wisconsin.

File:George Mifflin Dallas 1848.jpg]]

• President: George M. Dallas (D)
• President pro tempore: David R. Atchison (D)

• Speaker: Robert C. Winthrop (W)

This list is arranged by chamber, then by state. Senators are listed by class and representatives are listed by district.

:Skip to House of Representatives, below

{{col-begin}}

{{col-break}}

: {{Party stripe|Democratic Party (US)}}2. Dixon H. Lewis (D), until October 25, 1848

:: {{Party stripe|Democratic Party (US)}}Benjamin Fitzpatrick (D), from November 25, 1848

: {{Party stripe|Democratic Party (US)}}3. Arthur P. Bagby (D), until June 16, 1848

:: {{Party stripe|Democratic Party (US)}}William R. King (D), from July 1, 1848

: {{Party stripe|Democratic Party (US)}}2. Chester Ashley (D), until April 29, 1848

:: {{Party stripe|Democratic Party (US)}}William K. Sebastian (D), from May 12, 1848

: {{Party stripe|Democratic Party (US)}}3. Ambrose H. Sevier (D), until March 15, 1848

:: {{Party stripe|Democratic Party (US)}}Solon Borland (D), from March 30, 1848

: {{Party stripe|Whig Party (US)}}1. Jabez W. Huntington (W), until November 1, 1847

:: {{Party stripe|Whig Party (US)}}Roger S. Baldwin (W), from November 11, 1847

: {{Party stripe|Democratic Party (US)}}3. John M. Niles (D)

: {{Party stripe|Whig Party (US)}}1. John M. Clayton (W), until February 23, 1849

:: {{Party stripe|Whig Party (US)}}John Wales (W), from February 23, 1849

: {{Party stripe|Whig Party (US)}}2. Presley Spruance (W)

: {{Party stripe|Democratic Party (US)}}1. David Levy Yulee (D)

: {{Party stripe|Democratic Party (US)}}3. James Westcott (D)

: {{Party stripe|Whig Party (US)}}2. John Macpherson Berrien (W)

: {{Party stripe|Democratic Party (US)}}3. Walter T. Colquitt (D), until February 4, 1848

:: {{Party stripe|Democratic Party (US)}}Herschel V. Johnson (D), from February 4, 1848

: {{Party stripe|Democratic Party (US)}}2. Stephen A. Douglas (D)

: {{Party stripe|Democratic Party (US)}}3. Sidney Breese (D)

: {{Party stripe|Democratic Party (US)}}1. Jesse D. Bright (D)

: {{Party stripe|Democratic Party (US)}}3. Edward A. Hannegan (D)

: {{Party stripe|Democratic Party (US)}}2. George Wallace Jones (D), from December 7, 1848

: {{Party stripe|Democratic Party (US)}}3. Augustus C. Dodge (D), from December 7, 1848

: {{Party stripe|Whig Party (US)}}2. Joseph R. Underwood (W)

: {{Party stripe|Whig Party (US)}}3. John J. Crittenden (W), until June 12, 1848

:: {{Party stripe|Whig Party (US)}}Thomas Metcalfe (W), from June 23, 1848

: {{Party stripe|Democratic Party (US)}}2. Solomon W. Downs (D)

: {{Party stripe|Whig Party (US)}}3. Henry Johnson (W)

: {{Party stripe|Democratic Party (US)}}1. John Fairfield (D), until December 24, 1847

:: {{Party stripe|Democratic Party (US)}}Wyman B. S. Moor (D), January 5, 1848 – June 7, 1848

:: {{Party stripe|Democratic Party (US)}}Hannibal Hamlin (D), from June 7, 1848

: {{Party stripe|Democratic Party (US)}}2. James W. Bradbury (D)

: {{Party stripe|Whig Party (US)}}1. Reverdy Johnson (W)

: {{Party stripe|Whig Party (US)}}3. James Pearce (W)

: {{Party stripe|Whig Party (US)}}1. Daniel Webster (W)

: {{Party stripe|Whig Party (US)}}2. John Davis (W)

{{col-break}}

: {{Party stripe|Democratic Party (US)}}1. Lewis Cass (D), until May 29, 1848

:: {{Party stripe|Democratic Party (US)}}Thomas Fitzgerald (D), from June 8, 1848

: {{Party stripe|Democratic Party (US)}}2. Alpheus Felch (D)

: {{Party stripe|Democratic Party (US)}}1. Jesse Speight (D), until May 1, 1847

:: {{Party stripe|Democratic Party (US)}}Jefferson Davis (D), from August 10, 1847

: {{Party stripe|Democratic Party (US)}}2. Henry S. Foote (D)

: {{Party stripe|Democratic Party (US)}}1. Thomas H. Benton (D)

: {{Party stripe|Democratic Party (US)}}3. David R. Atchison (D)

: {{Party stripe|Independent Democratic Party (US}}2. John P. Hale (ID)

: {{Party stripe|Democratic Party (US)}}3. Charles G. Atherton (D)

: {{Party stripe|Whig Party (US)}}1. William L. Dayton (W)

: {{Party stripe|Whig Party (US)}}2. Jacob W. Miller (W)

: {{Party stripe|Democratic Party (US)}}1. Daniel S. Dickinson (D)

: {{Party stripe|Democratic Party (US)}}3. John A. Dix (D)

: {{Party stripe|Whig Party (US)}}2. Willie P. Mangum (W)

: {{Party stripe|Whig Party (US)}}3. George E. Badger (W)

: {{Party stripe|Whig Party (US)}}1. Thomas Corwin (W)

: {{Party stripe|Democratic Party (US)}}3. William Allen (D)

: {{Party stripe|Democratic Party (US)}}1. Daniel Sturgeon (D)

: {{Party stripe|Democratic Party (US)}}3. Simon Cameron (D)

: {{Party stripe|Whig Party (US)}}1. Albert C. Greene (W)

: {{Party stripe|Whig Party (US)}}2. John H. Clarke (W)

: {{Party stripe|Democratic Party (US)}}2. John C. Calhoun (D)

: {{Party stripe|Democratic Party (US)}}3. Andrew Butler (D)

: {{Party stripe|Democratic Party (US)}}1. Hopkins L. Turney (D)

: {{Party stripe|Whig Party (US)}}2. John Bell (W), from November 22, 1847

: {{Party stripe|Democratic Party (US)}}1. Thomas J. Rusk (D)

: {{Party stripe|Democratic Party (US)}}2. Samuel Houston (D)

: {{Party stripe|Whig Party (US)}}1. Samuel S. Phelps (W)

: {{Party stripe|Whig Party (US)}}3. William Upham (W)

: {{Party stripe|Democratic Party (US)}}1. James M. Mason (D)

: {{Party stripe|Democratic Party (US)}}2. Robert M. T. Hunter (D)

: {{Party stripe|Democratic Party (US)}}1. Henry Dodge (D), from June 8, 1848 (newly admitted state)

: {{Party stripe|Democratic Party (US)}}3. Isaac P. Walker (D), from June 8, 1848 (newly admitted state)

{{col-break}}

[[File:30th United States Congress Senators.svg|thumb|375px|Senators' party membership by state at the opening of the 30th Congress in March 1847. The green stripes in New Hampshire represent independent Democrat John P. Hale. The senators from Iowa and Wisconsin were not seated until later in the Congress.

{{legend|#0044aa|2 Democrats}}

{{legend|#660080|1 Democrat and 1 Whig}}

{{legend|#aa0000|2 Whigs}}]]

{{col-break}}

File:David Rice Atchison.jpg]]

{{col-end}}

The names of members of the House of Representatives are preceded by their district numbers.

{{col-begin}}

{{col-2}}

: {{Party stripe|Whig Party (US)}}{{ushr|Alabama|1|1}}. John Gayle (W)

: {{Party stripe|Whig Party (US)}}{{ushr|Alabama|2|2}}. Henry W. Hilliard (W)

: {{Party stripe|Democratic Party (US)}}{{ushr|Alabama|3|3}}. Sampson W. Harris (D)

: {{Party stripe|Democratic Party (US)}}{{ushr|Alabama|4|4}}. Samuel W. Inge (D)

: {{Party stripe|Democratic Party (US)}}{{ushr|Alabama|5|5}}. George S. Houston (D)

: {{Party stripe|Democratic Party (US)}}{{ushr|Alabama|6|6}}. Williamson R. W. Cobb (D)

: {{Party stripe|Democratic Party (US)}}{{ushr|Alabama|7|7}}. Franklin W. Bowdon (D)

: {{Party stripe|Democratic Party (US)}}{{ushr|Arkansas|AL|At-large}}. Robert W. Johnson (D)

: {{Party stripe|Whig Party (US)}}{{ushr|Connecticut|1|1}}. James Dixon (W)

: {{Party stripe|Whig Party (US)}}{{ushr|Connecticut|2|2}}. Samuel D. Hubbard (W)

: {{Party stripe|Whig Party (US)}}{{ushr|Connecticut|3|3}}. John A. Rockwell (W)

: {{Party stripe|Whig Party (US)}}{{ushr|Connecticut|4|4}}. Truman Smith (W)

: {{Party stripe|Whig Party (US)}}{{ushr|Delaware|AL|At-large}}. John W. Houston (W)

: {{Party stripe|Whig Party (US)}}{{ushr|Florida|AL|At-large}}. Edward C. Cabell (W)

: {{Party stripe|Whig Party (US)}}{{ushr|Georgia|1|1}}. Thomas Butler King (W)

: {{Party stripe|Democratic Party (US)}}{{ushr|Georgia|2|2}}. Alfred Iverson Sr. (D)

: {{Party stripe|Whig Party (US)}}{{ushr|Georgia|3|3}}. John W. Jones (W)

: {{Party stripe|Democratic Party (US)}}{{ushr|Georgia|4|4}}. Hugh A. Haralson (D)

: {{Party stripe|Democratic Party (US)}}{{ushr|Georgia|5|5}}. John H. Lumpkin (D)

: {{Party stripe|Democratic Party (US)}}{{ushr|Georgia|6|6}}. Howell Cobb (D)

: {{Party stripe|Whig Party (US)}}{{ushr|Georgia|7|7}}. Alexander H. Stephens (W)

: {{Party stripe|Whig Party (US)}}{{ushr|Georgia|8|8}}. Robert A. Toombs (W)

: {{Party stripe|Independent Democratic Party (US}}{{ushr|Illinois|1|1}}. Robert Smith (ID)

: {{Party stripe|Democratic Party (US)}}{{ushr|Illinois|2|2}}. John A. McClernand (D)

: {{Party stripe|Democratic Party (US)}}{{ushr|Illinois|3|3}}. Orlando B. Ficklin (D)

: {{Party stripe|Democratic Party (US)}}{{ushr|Illinois|4|4}}. John Wentworth (D)

: {{Party stripe|Democratic Party (US)}}{{ushr|Illinois|5|5}}. William A. Richardson (D), from December 6, 1847

: {{Party stripe|Democratic Party (US)}}{{ushr|Illinois|6|6}}. Thomas J. Turner (D)

: {{Party stripe|Whig Party (US)}}{{ushr|Illinois|7|7}}. Abraham Lincoln (W)

: {{Party stripe|Whig Party (US)}}{{ushr|Indiana|1|1}}. Elisha Embree (W)

: {{Party stripe|Democratic Party (US)}}{{ushr|Indiana|2|2}}. Thomas J. Henley (D)

: {{Party stripe|Democratic Party (US)}}{{ushr|Indiana|3|3}}. John L. Robinson (D)

: {{Party stripe|Whig Party (US)}}{{ushr|Indiana|4|4}}. Caleb B. Smith (W)

: {{Party stripe|Democratic Party (US)}}{{ushr|Indiana|5|5}}. William W. Wick (D)

: {{Party stripe|Whig Party (US)}}{{ushr|Indiana|6|6}}. George G. Dunn (W)

: {{Party stripe|Whig Party (US)}}{{ushr|Indiana|7|7}}. Richard W. Thompson (W)

: {{Party stripe|Democratic Party (US)}}{{ushr|Indiana|8|8}}. John Pettit (D)

: {{Party stripe|Democratic Party (US)}}{{ushr|Indiana|9|9}}. Charles W. Cathcart (D)

: {{Party stripe|Democratic Party (US)}}{{ushr|Indiana|10|10}}. William R. Rockhill (D)

: {{Party stripe|Democratic Party (US)}}{{ushr|Iowa|1|1}}. William Thompson (D)

: {{Party stripe|Democratic Party (US)}}{{ushr|Iowa|2|2}}. Shepherd Leffler (D)

: {{Party stripe|Democratic Party (US)}}{{ushr|Kentucky|1|1}}. Linn Boyd (D)

: {{Party stripe|Democratic Party (US)}}{{ushr|Kentucky|2|2}}. Beverly L. Clarke (D)

: {{Party stripe|Democratic Party (US)}}{{ushr|Kentucky|3|3}}. Samuel O. Peyton (D)

: {{Party stripe|Whig Party (US)}}{{ushr|Kentucky|4|4}}. Aylette Buckner (W)

: {{Party stripe|Whig Party (US)}}{{ushr|Kentucky|5|5}}. John B. Thompson (W)

: {{Party stripe|Whig Party (US)}}{{ushr|Kentucky|6|6}}. Green Adams (W)

: {{Party stripe|Whig Party (US)}}{{ushr|Kentucky|7|7}}. W. Garnett Duncan (W)

: {{Party stripe|Whig Party (US)}}{{ushr|Kentucky|8|8}}. Charles S. Morehead (W)

: {{Party stripe|Democratic Party (US)}}{{ushr|Kentucky|9|9}}. Richard French (D)

: {{Party stripe|Whig Party (US)}}{{ushr|Kentucky|10|10}}. John P. Gaines (W)

: {{Party stripe|Democratic Party (US)}}{{ushr|Louisiana|1|1}}. Emile La Sére (D)

: {{Party stripe|Whig Party (US)}}{{ushr|Louisiana|2|2}}. Bannon G. Thibodeaux (W)

: {{Party stripe|Democratic Party (US)}}{{ushr|Louisiana|3|3}}. John H. Harmanson (D)

: {{Party stripe|Democratic Party (US)}}{{ushr|Louisiana|4|4}}. Isaac E. Morse (D)

: {{Party stripe|Democratic Party (US)}}{{ushr|Maine|1|1}}. David Hammons (D)

: {{Party stripe|Democratic Party (US)}}{{ushr|Maine|2|2}}. Asa W. H. Clapp (D)

: {{Party stripe|Whig Party (US)}}{{ushr|Maine|3|3}}. Hiram Belcher (W)

: {{Party stripe|Democratic Party (US)}}{{ushr|Maine|4|4}}. Franklin Clark (D)

: {{Party stripe|Democratic Party (US)}}{{ushr|Maine|5|5}}. Ephraim K. Smart (D)

: {{Party stripe|Democratic Party (US)}}{{ushr|Maine|6|6}}. James S. Wiley (D)

: {{Party stripe|Democratic Party (US)}}{{ushr|Maine|7|7}}. Hezekiah Williams (D)

: {{Party stripe|Whig Party (US)}}{{ushr|Maryland|1|1}}. John G. Chapman (W)

: {{Party stripe|Whig Party (US)}}{{ushr|Maryland|2|2}}. J. Dixon Roman (W)

: {{Party stripe|Democratic Party (US)}}{{ushr|Maryland|3|3}}. Thomas W. Ligon (D)

: {{Party stripe|Democratic Party (US)}}{{ushr|Maryland|4|4}}. Robert M. McLane (D)

: {{Party stripe|Whig Party (US)}}{{ushr|Maryland|5|5}}. Alexander Evans (W)

: {{Party stripe|Whig Party (US)}}{{ushr|Maryland|6|6}}. John W. Crisfield (W)

: {{Party stripe|Whig Party (US)}}{{ushr|Massachusetts|1|1}}. Robert C. Winthrop (W)

: {{Party stripe|Whig Party (US)}}{{ushr|Massachusetts|2|2}}. Daniel P. King (W)

: {{Party stripe|Whig Party (US)}}{{ushr|Massachusetts|3|3}}. Amos Abbott (W)

: {{Party stripe|Whig Party (US)}}{{ushr|Massachusetts|4|4}}. John G. Palfrey (W)

: {{Party stripe|Whig Party (US)}}{{ushr|Massachusetts|5|5}}. Charles Hudson (W)

: {{Party stripe|Whig Party (US)}}{{ushr|Massachusetts|6|6}}. George Ashmun (W)

: {{Party stripe|Whig Party (US)}}{{ushr|Massachusetts|7|7}}. Julius Rockwell (W)

: {{Party stripe|Whig Party (US)}}{{ushr|Massachusetts|8|8}}. John Quincy Adams (W), until February 23, 1848

:: {{Party stripe|Whig Party (US)}}Horace Mann (W), from April 3, 1848

: {{Party stripe|Whig Party (US)}}{{ushr|Massachusetts|9|9}}. Artemas Hale (W)

: {{Party stripe|Whig Party (US)}}{{ushr|Massachusetts|10|10}}. Joseph Grinnell (W)

: {{Party stripe|Democratic Party (US)}}{{ushr|Michigan|1|1}}. Robert McClelland (D)

: {{Party stripe|Democratic Party (US)}}{{ushr|Michigan|2|2}}. Edward Bradley (D), until August 5, 1847

:: {{Party stripe|Democratic Party (US)}}Charles E. Stuart (D), from December 6, 1847

: {{Party stripe|Democratic Party (US)}}{{ushr|Michigan|3|3}}. Kinsley S. Bingham (D)

: {{Party stripe|Democratic Party (US)}}{{ushr|Mississippi|1|1}}. Jacob Thompson (D)

: {{Party stripe|Democratic Party (US)}}{{ushr|Mississippi|2|2}}. Winfield S. Featherston (D)

: {{Party stripe|Whig Party (US)}}{{ushr|Mississippi|3|3}}. Patrick W. Tompkins (W)

: {{Party stripe|Democratic Party (US)}}{{ushr|Mississippi|4|4}}. Albert G. Brown (D)

: {{Party stripe|Democratic Party (US)}}{{ushr|Missouri|1|1}}. James B. Bowlin (D)

: {{Party stripe|Democratic Party (US)}}{{ushr|Missouri|2|2}}. John Jameson (D)

: {{Party stripe|Democratic Party (US)}}{{ushr|Missouri|3|3}}. James S. Green (D)

: {{Party stripe|Democratic Party (US)}}{{ushr|Missouri|4|4}}. Willard P. Hall (D)

: {{Party stripe|Democratic Party (US)}}{{ushr|Missouri|5|5}}. John S. Phelps (D)

: {{Party stripe|Independent (US)}}{{ushr|New Hampshire|1|1}}. Amos Tuck (I)

: {{Party stripe|Democratic Party (US)}}{{ushr|New Hampshire|2|2}}. Charles H. Peaslee (D)

: {{Party stripe|Whig Party (US)}}{{ushr|New Hampshire|3|3}}. James Wilson (W)

: {{Party stripe|Democratic Party (US)}}{{ushr|New Hampshire|4|4}}. James H. Johnson (D)

: {{Party stripe|Whig Party (US)}}{{ushr|New Jersey|1|1}}. James G. Hampton (W)

: {{Party stripe|Whig Party (US)}}{{ushr|New Jersey|2|2}}. William A. Newell (W)

: {{Party stripe|Democratic Party (US)}}{{ushr|New Jersey|3|3}}. Joseph E. Edsall (D)

: {{Party stripe|Whig Party (US)}}{{ushr|New Jersey|4|4}}. John Van Dyke (W)

: {{Party stripe|Whig Party (US)}}{{ushr|New Jersey|5|5}}. Dudley S. Gregory (W)

: {{Party stripe|Democratic Party (US)}}{{ushr|New York|1|1}}. Frederick W. Lord (D)

: {{Party stripe|Democratic Party (US)}}{{ushr|New York|2|2}}. Henry C. Murphy (D)

: {{Party stripe|Democratic Party (US)}}{{ushr|New York|3|3}}. Henry Nicoll (D)

: {{Party stripe|Democratic Party (US)}}{{ushr|New York|4|4}}. William B. Maclay (D)

: {{Party stripe|Whig Party (US)}}{{ushr|New York|5|5}}. Frederick A. Tallmadge (W)

: {{Party stripe|Democratic Party (US)}}{{ushr|New York|6|6}}. David S. Jackson (D), until April 19, 1848

:: {{Party stripe|Whig Party (US)}}Horace Greeley (W), from December 4, 1848

: {{Party stripe|Whig Party (US)}}{{ushr|New York|7|7}}. William Nelson (W)

: {{Party stripe|Whig Party (US)}}{{ushr|New York|8|8}}. Cornelius Warren (W)

: {{Party stripe|Whig Party (US)}}{{ushr|New York|9|9}}. Daniel B. St. John (W)

: {{Party stripe|Whig Party (US)}}{{ushr|New York|10|10}}. Eliakim Sherrill (W)

: {{Party stripe|Whig Party (US)}}{{ushr|New York|11|11}}. Peter H. Silvester (W)

: {{Party stripe|Whig Party (US)}}{{ushr|New York|12|12}}. Gideon Reynolds (W)

: {{Party stripe|Whig Party (US)}}{{ushr|New York|13|13}}. John I. Slingerland (W)

: {{Party stripe|Whig Party (US)}}{{ushr|New York|14|14}}. Orlando Kellogg (W)

: {{Party stripe|Democratic Party (US)}}{{ushr|New York|15|15}}. Sidney Lawrence (D)

: {{Party stripe|Whig Party (US)}}{{ushr|New York|16|16}}. Hugh White (W)

: {{Party stripe|Independent Democratic Party (US}}{{ushr|New York|17|17}}. George Petrie (ID)

: {{Party stripe|Democratic Party (US)}}{{ushr|New York|18|18}}. William Collins (D)

: {{Party stripe|Whig Party (US)}}{{ushr|New York|19|19}}. Joseph Mullin (W)

: {{Party stripe|Democratic Party (US)}}{{ushr|New York|20|20}}. Timothy Jenkins (D)

: {{Party stripe|Democratic Party (US)}}{{ushr|New York|21|21}}. George A. Starkweather (D)

: {{Party stripe|Democratic Party (US)}}{{ushr|New York|22|22}}. Ausburn Birdsall (D)

: {{Party stripe|Whig Party (US)}}{{ushr|New York|23|23}}. William Duer (W)

: {{Party stripe|Whig Party (US)}}{{ushr|New York|24|24}}. Daniel Gott (W)

: {{Party stripe|Whig Party (US)}}{{ushr|New York|25|25}}. Harmon S. Conger (W)

: {{Party stripe|Whig Party (US)}}{{ushr|New York|26|26}}. William T. Lawrence (W)

: {{Party stripe|Whig Party (US)}}{{ushr|New York|27|27}}. John M. Holley (W), until March 8, 1848

:: {{Party stripe|Whig Party (US)}}Esbon Blackmar (W), from December 4, 1848

: {{Party stripe|Whig Party (US)}}{{ushr|New York|28|28}}. Elias B. Holmes (W)

: {{Party stripe|Whig Party (US)}}{{ushr|New York|29|29}}. Robert L. Rose (W)

: {{Party stripe|Whig Party (US)}}{{ushr|New York|30|30}}. David Rumsey Jr. (W)

: {{Party stripe|Whig Party (US)}}{{ushr|New York|31|31}}. Dudley Marvin (W)

: {{Party stripe|Whig Party (US)}}{{ushr|New York|32|32}}. Nathan K. Hall (W)

: {{Party stripe|Whig Party (US)}}{{ushr|New York|33|33}}. Harvey Putnam (W)

: {{Party stripe|Whig Party (US)}}{{ushr|New York|34|34}}. Washington Hunt (W)

{{col-2}}

: {{Party stripe|Whig Party (US)}}{{ushr|North Carolina|1|1}}. Thomas L. Clingman (W)

: {{Party stripe|Whig Party (US)}}{{ushr|North Carolina|2|2}}. Nathaniel Boyden (W)

: {{Party stripe|Whig Party (US)}}{{ushr|North Carolina|3|3}}. Daniel M. Barringer (W)

: {{Party stripe|Whig Party (US)}}{{ushr|North Carolina|4|4}}. Augustine H. Shepperd (W)

: {{Party stripe|Democratic Party (US)}}{{ushr|North Carolina|5|5}}. Abraham W. Venable (D)

: {{Party stripe|Democratic Party (US)}}{{ushr|North Carolina|6|6}}. John R. J. Daniel (D)

: {{Party stripe|Democratic Party (US)}}{{ushr|North Carolina|7|7}}. James I. McKay (D)

: {{Party stripe|Whig Party (US)}}{{ushr|North Carolina|8|8}}. Richard S. Donnell (W)

: {{Party stripe|Whig Party (US)}}{{ushr|North Carolina|9|9}}. David Outlaw (W)

: {{Party stripe|Democratic Party (US)}}{{ushr|Ohio|1|1}}. James J. Faran (D)

: {{Party stripe|Whig Party (US)}}{{ushr|Ohio|2|2}}. David Fisher (W)

: {{Party stripe|Whig Party (US)}}{{ushr|Ohio|3|3}}. Robert C. Schenck (W)

: {{Party stripe|Whig Party (US)}}{{ushr|Ohio|4|4}}. Richard S. Canby (W)

: {{Party stripe|Democratic Party (US)}}{{ushr|Ohio|5|5}}. William Sawyer (D)

: {{Party stripe|Democratic Party (US)}}{{ushr|Ohio|6|6}}. Rodolphus Dickinson (D)

: {{Party stripe|Democratic Party (US)}}{{ushr|Ohio|7|7}}. Jonathan D. Morris (D)

: {{Party stripe|Whig Party (US)}}{{ushr|Ohio|8|8}}. John L. Taylor (W)

: {{Party stripe|Whig Party (US)}}{{ushr|Ohio|9|9}}. Thomas O. Edwards (W)

: {{Party stripe|Whig Party (US)}}{{ushr|Ohio|10|10}}. Daniel Duncan (W)

: {{Party stripe|Democratic Party (US)}}{{ushr|Ohio|11|11}}. John K. Miller (D)

: {{Party stripe|Whig Party (US)}}{{ushr|Ohio|12|12}}. Samuel F. Vinton (W)

: {{Party stripe|Democratic Party (US)}}{{ushr|Ohio|13|13}}. Thomas Ritchey (D)

: {{Party stripe|Whig Party (US)}}{{ushr|Ohio|14|14}}. Nathan Evans (W)

: {{Party stripe|Democratic Party (US)}}{{ushr|Ohio|15|15}}. William Kennon Jr. (D)

: {{Party stripe|Democratic Party (US)}}{{ushr|Ohio|16|16}}. John D. Cummins (D)

: {{Party stripe|Democratic Party (US)}}{{ushr|Ohio|17|17}}. George Fries (D)

: {{Party stripe|Democratic Party (US)}}{{ushr|Ohio|18|18}}. Samuel Lahm (D)

: {{Party stripe|Whig Party (US)}}{{ushr|Ohio|19|19}}. John Crowell (W)

: {{Party stripe|Whig Party (US)}}{{ushr|Ohio|20|20}}. Joshua R. Giddings (W)

: {{Party stripe|Whig Party (US)}}{{ushr|Ohio|21|21}}. Joseph M. Root (W)

: {{Party stripe|Know Nothing}}{{ushr|Pennsylvania|1|1}}. Lewis C. Levin (A)

: {{Party stripe|Whig Party (US)}}{{ushr|Pennsylvania|2|2}}. Joseph R. Ingersoll (W)

: {{Party stripe|Democratic Party (US)}}{{ushr|Pennsylvania|3|3}}. Charles Brown (D)

: {{Party stripe|Democratic Party (US)}}{{ushr|Pennsylvania|4|4}}. Charles J. Ingersoll (D)

: {{Party stripe|Whig Party (US)}}{{ushr|Pennsylvania|5|5}}. John Freedley (W)

: {{Party stripe|Whig Party (US)}}{{ushr|Pennsylvania|6|6}}. John W. Hornbeck (W), until January 16, 1848

:: {{Party stripe|Democratic Party (US)}}Samuel A. Bridges (D), from March 6, 1848

: {{Party stripe|Whig Party (US)}}{{ushr|Pennsylvania|7|7}}. Abraham R. McIlvaine (W)

: {{Party stripe|Whig Party (US)}}{{ushr|Pennsylvania|8|8}}. John Strohm (W)

: {{Party stripe|Democratic Party (US)}}{{ushr|Pennsylvania|9|9}}. William Strong (D)

: {{Party stripe|Democratic Party (US)}}{{ushr|Pennsylvania|10|10}}. Richard Brodhead (D)

: {{Party stripe|Whig Party (US)}}{{ushr|Pennsylvania|11|11}}. Chester P. Butler (W)

: {{Party stripe|Democratic Party (US)}}{{ushr|Pennsylvania|12|12}}. David Wilmot (D)

: {{Party stripe|Whig Party (US)}}{{ushr|Pennsylvania|13|13}}. James Pollock (W)

: {{Party stripe|Whig Party (US)}}{{ushr|Pennsylvania|14|14}}. George N. Eckert (W)

: {{Party stripe|Whig Party (US)}}{{ushr|Pennsylvania|15|15}}. Henry Nes (W)

: {{Party stripe|Whig Party (US)}}{{ushr|Pennsylvania|16|16}}. Jasper E. Brady (W)

: {{Party stripe|Whig Party (US)}}{{ushr|Pennsylvania|17|17}}. John Blanchard (W)

: {{Party stripe|Whig Party (US)}}{{ushr|Pennsylvania|18|18}}. Andrew Stewart (W)

: {{Party stripe|Democratic Party (US)}}{{ushr|Pennsylvania|19|19}}. Job Mann (D)

: {{Party stripe|Whig Party (US)}}{{ushr|Pennsylvania|20|20}}. John Dickey (W)

: {{Party stripe|Whig Party (US)}}{{ushr|Pennsylvania|21|21}}. Moses Hampton (W)

: {{Party stripe|Whig Party (US)}}{{ushr|Pennsylvania|22|22}}. John W. Farrelly (W)

: {{Party stripe|Democratic Party (US)}}{{ushr|Pennsylvania|23|23}}. James Thompson (D)

: {{Party stripe|Whig Party (US)}}{{ushr|Pennsylvania|24|24}}. Alexander Irvin (W)

: {{Party stripe|Whig Party (US)}}{{ushr|Rhode Island|1|1}}. Robert B. Cranston (W)

: {{Party stripe|Democratic Party (US)}}{{ushr|Rhode Island|2|2}}. Benjamin B. Thurston (D)

: {{Party stripe|Democratic Party (US)}}{{ushr|South Carolina|1|1}}. James A. Black (D), until April 3, 1848

:: {{Party stripe|Democratic Party (US)}}Daniel Wallace (D), from June 12, 1848

: {{Party stripe|Democratic Party (US)}}{{ushr|South Carolina|2|2}}. Richard F. Simpson (D)

: {{Party stripe|Democratic Party (US)}}{{ushr|South Carolina|3|3}}. Joseph A. Woodward (D)

: {{Party stripe|Democratic Party (US)}}{{ushr|South Carolina|4|4}}. Alexander D. Sims (D), until November 22, 1848

:: {{Party stripe|Democratic Party (US)}}John McQueen (D), from February 12, 1849

: {{Party stripe|Democratic Party (US)}}{{ushr|South Carolina|5|5}}. Armistead Burt (D)

: {{Party stripe|Democratic Party (US)}}{{ushr|South Carolina|6|6}}. Isaac E. Holmes (D)

: {{Party stripe|Democratic Party (US)}}{{ushr|South Carolina|7|7}}. Robert Rhett (D)

: {{Party stripe|Democratic Party (US)}}{{ushr|Tennessee|1|1}}. Andrew Johnson (D)

: {{Party stripe|Whig Party (US)}}{{ushr|Tennessee|2|2}}. William M. Cocke (W)

: {{Party stripe|Whig Party (US)}}{{ushr|Tennessee|3|3}}. John H. Crozier (W)

: {{Party stripe|Democratic Party (US)}}{{ushr|Tennessee|4|4}}. Hugh L. W. Hill (D)

: {{Party stripe|Democratic Party (US)}}{{ushr|Tennessee|5|5}}. George W. Jones (D)

: {{Party stripe|Democratic Party (US)}}{{ushr|Tennessee|6|6}}. James H. Thomas (D)

: {{Party stripe|Whig Party (US)}}{{ushr|Tennessee|7|7}}. Meredith P. Gentry (W)

: {{Party stripe|Whig Party (US)}}{{ushr|Tennessee|8|8}}. Washington Barrow (W)

: {{Party stripe|Democratic Party (US)}}{{ushr|Tennessee|9|9}}. Lucien B. Chase (D)

: {{Party stripe|Democratic Party (US)}}{{ushr|Tennessee|10|10}}. Frederick P. Stanton (D)

: {{Party stripe|Whig Party (US)}}{{ushr|Tennessee|11|11}}. William T. Haskell (W)

: {{Party stripe|Democratic Party (US)}}{{ushr|Texas|1|1}}. David S. Kaufman (D)

: {{Party stripe|Democratic Party (US)}}{{ushr|Texas|2|2}}. Timothy Pilsbury (D)

: {{Party stripe|Whig Party (US)}}{{ushr|Vermont|1|1}}. William Henry (W)

: {{Party stripe|Whig Party (US)}}{{ushr|Vermont|2|2}}. Jacob Collamer (W)

: {{Party stripe|Whig Party (US)}}{{ushr|Vermont|3|3}}. George P. Marsh (W)

: {{Party stripe|Democratic Party (US)}}{{ushr|Vermont|4|4}}. Lucius B. Peck (D)

: {{Party stripe|Democratic Party (US)}}{{ushr|Virginia|1|1}}. Archibald Atkinson (D)

: {{Party stripe|Democratic Party (US)}}{{ushr|Virginia|2|2}}. George Dromgoole (D), until April 27, 1847

:: {{Party stripe|Democratic Party (US)}}Richard K. Meade (D), from August 5, 1847

: {{Party stripe|Whig Party (US)}}{{ushr|Virginia|3|3}}. Thomas S. Flournoy (W)

: {{Party stripe|Democratic Party (US)}}{{ushr|Virginia|4|4}}. Thomas S. Bocock (D)

: {{Party stripe|Whig Party (US)}}{{ushr|Virginia|5|5}}. William L. Goggin (W)

: {{Party stripe|Whig Party (US)}}{{ushr|Virginia|6|6}}. John M. Botts (W)

: {{Party stripe|Democratic Party (US)}}{{ushr|Virginia|7|7}}. Thomas H. Bayly (D)

: {{Party stripe|Democratic Party (US)}}{{ushr|Virginia|8|8}}. Richard L. T. Beale (D)

: {{Party stripe|Whig Party (US)}}{{ushr|Virginia|9|9}}. John S. Pendleton (W)

: {{Party stripe|Democratic Party (US)}}{{ushr|Virginia|10|10}}. Henry Bedinger (D)

: {{Party stripe|Democratic Party (US)}}{{ushr|Virginia|11|11}}. James McDowell (D)

: {{Party stripe|Whig Party (US)}}{{ushr|Virginia|12|12}}. William B. Preston (W)

: {{Party stripe|Whig Party (US)}}{{ushr|Virginia|13|13}}. Andrew S. Fulton (W)

: {{Party stripe|Democratic Party (US)}}{{ushr|Virginia|14|14}}. Robert A. Thompson (D)

: {{Party stripe|Democratic Party (US)}}{{ushr|Virginia|15|15}}. William G. Brown Sr. (D)

: {{Party stripe|Democratic Party (US)}}{{ushr|Wisconsin|1|1}}. William P. Lynde (D), from June 8, 1848 (newly admitted state)

: {{Party stripe|Democratic Party (US)}}{{ushr|Wisconsin|2|2}}. Mason C. Darling (D), from June 8, 1848 (newly admitted state)

: {{Party stripe|Whig Party (US)}}{{ushr|Wisconsin Territory|AL|Wisconsin Territory}}. John H. Tweedy (W), until May 29, 1848

:: {{0|▌}}Henry H. Sibley, from October 30, 1848

{{col-break}}

File:RCWinthrop.jpg]]

[[File:30 us house membership.png|thumb|400px|

]]

File:Abraham Lincoln by Nicholas Shepherd, 1846-crop.jpg

{{col-end}}

The count below reflects changes from the beginning of the first session of this Congress.

• Replacements: 11
• Democrats (D): 4 seat net gain
• Whigs (W): no net change
• Deaths: 5
• Resignations: 6
• Interim appointments: 7
• Seats of newly admitted states: 4

{{See also|List of special elections to the United States Senate}}

{{Ordinal US Congress change|Senate}}

|-

| Tennessee
(2)

| Vacant

| Failure to elect.
Successor elected November 22, 1847.

| {{party shading/Whig}} | John Bell (W)

| Elected November 22, 1847.

|-

| Iowa
(2)

| Vacant

| Iowa had been admitted to the Union December 28, 1846, but the legislature failed to elect due to a three-way split that prevented any candidate from earning the required number of 30 legislators' votes.{{cite book | first=Dan Elbert | last=Clark | url=https://archive.org/details/historyofsenator00clar | title=History of Senatorial Elections in Iowa | publisher=State Historical Society of Iowa | pages= [https://archive.org/details/historyofsenator00clar/page/17 17]–46, 72–79 | location=Iowa | date=1913}}
First Senator elected December 7, 1848.

| {{party shading/Democratic}} | George Wallace Jones (D)

| Elected December 7, 1848.

|-

| Iowa
(3)

| Vacant

| Iowa had been admitted to the Union December 28, 1846, but the legislature failed to elect due to a three-way split that prevented any candidate from earning the required number of 30 legislators' votes.
First Senator elected December 7, 1848.

| {{party shading/Democratic}} | Augustus C. Dodge (D)

| Elected December 7, 1848.

|-

| Mississippi
(1)

| {{party shading/Democratic}} | Jesse Speight (D)

| Incumbent died May 1, 1847.
Successor appointed August 10, 1847, and then elected January 1848.

| {{party shading/Democratic}} | Jefferson Davis (D)

| Appointed December 5, 1847.

|-

| Connecticut
(1)

| {{party shading/Whig}} | Jabez W. Huntington (W)

| Incumbent died November 1, 1847.
Successor appointed November 11, 1847, and then elected May 1848.

| {{party shading/Whig}} | Roger S. Baldwin (W)

| Appointed December 5, 1847.

|-

| Maine
(1)

| {{party shading/Democratic}} | John Fairfield (D)

| Incumbent died December 24, 1847.
Successor appointed January 5, 1848.

| {{party shading/Democratic}} | Wyman B. S. Moor (D)

| Appointed January 5, 1848.

|-

| Georgia
(3)

| {{party shading/Democratic}} | Walter T. Colquitt (D)

| Incumbent resigned February 4, 1848.
Successor appointed February 4, 1848, to finish the term.

| {{party shading/Democratic}} | Herschel V. Johnson (D)

| Appointed February 4, 1848.

|-

| Arkansas
(3)

| {{party shading/Democratic}} | Ambrose H. Sevier (D)

| Incumbent resigned March 15, 1848.
Successor appointed March 30, 1848, to finish the term.

| {{party shading/Democratic}} | Solon Borland (D)

| Appointed March 30, 1848.

|-

| Arkansas
(2)

| {{party shading/Democratic}} | Chester Ashley (D)

| Incumbent died April 29, 1848.
Successor appointed May 12, 1848, and elected sometime thereafter.

| {{party shading/Democratic}} | William K. Sebastian (D)

| Elected May 12, 1848.

|-

| Wisconsin
(1)

| colspan=2 | Wisconsin admitted to the Union May 29, 1848.
First Senator elected June 8, 1848.

| {{party shading/Democratic}} | Henry Dodge (D)

| Elected June 8, 1848.

|-

| Wisconsin
(3)

| colspan=2 | Wisconsin admitted to the Union May 29, 1848.
First Senator elected June 8, 1848.

| {{party shading/Democratic}} | Isaac P. Walker (D)

| Elected June 8, 1848.

|-

| Michigan
(1)

| {{party shading/Democratic}} | Lewis Cass (D)

| Incumbent resigned May 29, 1848, to run for U.S. President.
Successor appointed June 8, 1848.

| {{party shading/Democratic}} | Thomas Fitzgerald (D)

| Elected June 8, 1848.

|-

| Maine
(1)

| {{party shading/Democratic}} | Wyman B. S. Moor (D)

| Interim appointee retired when successor elected June 7, 1848.

| {{party shading/Democratic}} | Hannibal Hamlin (D)

| Elected June 7, 1848.

|-

| Kentucky
(3)

| {{party shading/Whig}} | John J. Crittenden (W)

| Incumbent resigned June 12, 1848, to run for Governor of Kentucky.
Successor appointed June 23, 1848, and elected sometime thereafter.

| {{party shading/Whig}} | Thomas Metcalfe (W)

| Elected June 23, 1848.

|-

| Alabama
(3)

| {{party shading/Democratic}} | Arthur P. Bagby (D)

| Incumbent resigned June 16, 1848, to become U.S. Minister to Russia.
Successor elected July 1, 1848.

| {{party shading/Democratic}} | William R. King (D)

| Elected July 1, 1848.

|-

| Alabama
(2)

| {{party shading/Democratic}} | Dixon H. Lewis (D)

| Incumbent died October 25, 1848.
Successor elected November 25, 1848.

| {{party shading/Democratic}} | Benjamin Fitzpatrick (D)

| Elected November 25, 1848.

|-

| Delaware
(1)

| {{party shading/Whig}} | John M. Clayton (W)

| Incumbent resigned February 23, 1849, to become U.S. Secretary of State.
Successor elected February 23, 1849.

| {{party shading/Whig}} | John Wales (W)

| Elected February 23, 1849.

|}

• Replacements: 10
• Democrats (D): no net change
• Whigs (W): no net change
• Deaths: 7
• Resignations: 0
• Contested election: 1
• Seats of newly admitted states: 2
• Total seats with changes: 12

{{main|List of special elections to the United States House of Representatives}}

{{Ordinal US Congress change|House}}

|-

| {{ushr|Illinois|5|Illinois 5th}}

| Vacant

| Representative Stephen A. Douglas resigned at end of previous congress.

| {{party shading/Democratic}} | William A. Richardson (D)

| Seated December 6, 1847

|-

| {{ushr|Virginia|2|Virginia 2nd}}

| {{party shading/Democratic}} | George Dromgoole (D)

| Incumbent died April 27, 1847.

| {{party shading/Democratic}} | Richard K. Meade (D)

| Seated August 5, 1847

|-

| {{ushr|Michigan|2|Michigan 2nd}}

| {{party shading/Democratic}} | Edward Bradley (D)

| Incumbent died August 5, 1847.

| {{party shading/Democratic}} | Charles E. Stuart (D)

| Seated December 6, 1847

|-

| {{ushr|Pennsylvania|6|Pennsylvania 6th}}

| {{party shading/Whig}} | John W. Hornbeck (W)

| Incumbent died January 16, 1848.

| {{party shading/Democratic}} | Samuel A. Bridges (D)

| Seated March 6, 1848

|-

| {{ushr|Massachusetts|8|Massachusetts 8th}}

| {{party shading/Whig}} | John Quincy Adams (W)

| Incumbent died February 23, 1848.

| {{party shading/Whig}} | Horace Mann (W)

| Seated April 3, 1848

|-

| {{ushr|New York|27|New York 27th}}

| {{party shading/Whig}} | John M. Holley (W)

| Incumbent died March 8, 1848.

| {{party shading/Whig}} | Esbon Blackmar (W)

| Seated December 4, 1848

|-

| {{ushr|South Carolina|1|South Carolina 1st}}

| {{party shading/Democratic}} | James A. Black (D)

| Incumbent died April 3, 1848.

| {{party shading/Democratic}} | Daniel Wallace (D)

| Seated June 12, 1848

|-

| {{ushr|New York|6|New York 6th}}

| {{party shading/Democratic}} | David S. Jackson (D)

| James Monroe contested seat after which the House declared the seat vacant April 19, 1848.

| {{party shading/Whig}} | Horace Greeley (W)

| Seated December 4, 1848

|-

| {{ushr|Wisconsin|1|Wisconsin 1st}}

| colspan=2 | Wisconsin admitted into the Union May 29, 1848, and seat remained vacant until June 8, 1848.

| {{party shading/Democratic}} | William P. Lynde (D)

| Seated June 8, 1848

|-

| {{ushr|Wisconsin|2|Wisconsin 2nd}}

| colspan=2 | Wisconsin admitted into the Union May 29, 1848, and seat remained vacant until June 8, 1848.

| {{party shading/Democratic}} | Mason C. Darling (D)

| Seated June 8, 1848

|-

| {{ushr|Wisconsin Territory|AL|Wisconsin Territory At-large}}

| {{party shading/Whig}} | John H. Tweedy (W)

| Incumbent was disqualified May 29, 1848, after the portion of territory he resided in achieved statehood.

| Henry H. Sibley

| Seated October 30, 1848

|-

| {{ushr|South Carolina|4|South Carolina 4th}}

| {{party shading/Democratic}} | Alexander D. Sims (D)

| Incumbent died November 22, 1848.

| {{party shading/Democratic}} | John McQueen (D)

| Seated February 12, 1849

|}

Lists of committees and their party leaders.

• Agriculture (Chairman: Daniel Sturgeon)
• Audit and Control the Contingent Expenses of the Senate (Chairman: Alpheus Felch then Isaac P. Walker)
• Claims (Chairman: Moses Norris Jr.)
• Commerce (Chairman: John Adams Dix)
• Distributing Public Revenue Among the States (Select)
• District of Columbia (Chairman: Herschel V. Johnson)
• Expedition of John C. Fremont (Select)
• Enrolled Bills (Chairman: Thomas J. Rusk)
• Finance (Chairman: Charles G. Atherton)
• Foreign Relations (Chairman: Ambrose H. Sevier then Edward A. Hannegan then Thomas Hart Benton)
• Indian Affairs (Chairman: David R. Atchison)
• Judiciary (Chairman: Andrew P. Butler)
• Library (Chairman: James A. Pearce)
• Manufactures (Chairman: Daniel S. Dickinson)
• Memorial of Certain Cherokee Claimants (Select)
• Military Affairs (Chairman: Lewis Cass then Thomas Hart Benton)
• Militia (Chairman: Thomas J. Rusk)
• Monuments to Deceased Senators (Select)
• Naval Affairs (Chairman: David Levy Yulee)
• Oregon Railroad (Select)
• Ordnance and War Ships (Select)
• Patents and the Patent Office (Chairman: James D. Westcott)
• Pensions (Chairman: Henry Johnson)
• Post Office and Post Roads (Chairman: John M. Niles)
• Printing (Chairman: Simon Cameron)
• Private Land Claims (Chairman: Solomon W. Downs)
• Public Buildings and Grounds (Chairman: Robert M.T. Hunter)
• Public Lands (Chairman: Sidney Breese then Alpheus Felch)
• Retired List for the Army and the Navy (Select)
• Retrenchment (Chairman: Hopkins L. Turney)
• Seventh Census (Select)
• Revolutionary Claims (Chairman: Jesse D. Bright)
• Rivers and Harbors Convention in Chicago (Select)
• Roads and Canals (Chairman: Edward A. Hannegan)
• Tariff Bill of 1828 (Special)
• Tariff Regulation (Select)
• Territories (Chairman: Stephen A. Douglas)
• Whole

• Accounts (Chairman: Daniel P. King)
• Agriculture (Chairman: Hugh White)
• Claims (Chairman: Joseph R. Ingersoll)
• Commerce (Chairman: Washington Hunt)
• District of Columbia (Chairman: John G. Chapman)
• Elections (Chairman: Richard W. Thompson)
• Engraving (Chairman: Lewis Charles Levin)
• Enrolled Bills (Chairman: James G. Hampton)
• Expenditures in the Navy Department (Chairman: Patrick W. Tompkins)
• Expenditures in the Post Office Department (Chairman: James Wilson)
• Expenditures in the State Department (Chairman: Daniel M. Barringer)
• Expenditures in the Treasury Department (Chairman: Joseph M. Root)
• Expenditures in the War Department (Chairman: John H. Crozier)
• Expenditures on Public Buildings (Chairman: Edward Carrington Cabell)
• Foreign Affairs (Chairman: John A. McClernand)
• Indian Affairs (Chairman: Daniel M. Barringer)
• Invalid Pensions (Chairman: Andrew S. Fulton)
• Judiciary (Chairman: Joseph R. Ingersoll)
• Manufactures (Chairman: Andrew Stewart)
• Mileage (Chairman: Hiram Belcher)
• Military Affairs (Chairman: John M. Botts)
• Militia (Chairman: John B. Thompson)
• Naval Affairs (Chairman: Thomas Butler King)
• Patents (Chairman: John W. Farrelly)
• Printing (Chairman: Harmon S. Conger)
• Private Land Claims (Chairman: John Gayle)
• Post Office and Post Roads (Chairman: William L. Goggin)
• Public Buildings and Grounds (Chairman: John W. Houston)
• Public Expenditures (Chairman: Thomas L. Clingman)
• Public Lands (Chairman: Jacob Collamer)
• Revisal and Unfinished Business (Chairman: Henry Nes)
• Revolutionary Claims (Chairman: Daniel P. King)
• Revolutionary Pensions (Chairman: William M. Cocke)
• Roads and Canals (Chairman: Robert C. Schenck)
• Rules (Select)
• Standards of Official Conduct
• Territories (Chairman: Caleb B. Smith)
• Ways and Means (Chairman: Samuel F. Vinton)
• Whole

• Enrolled Bills
• The Library
• Printing

• Librarian of Congress: John Silva Meehan

• Chaplain: Henry Slicer (Methodist)
• Secretary: Asbury Dickins
• Sergeant at Arms: Robert Beale

• Chaplain: William T.S. Sprole (Presbyterian), until December 6, 1847
• Ralph Gurley (Presbyterian), elected December 6, 1847
• Clerk: Benjamin B. French, until December 8, 1847
• Thomas J. Campbell, elected December 8, 1847
• Doorkeeper: Robert E. Horner, elected December 8, 1847
• Postmaster: John M. Johnson
• Reading Clerks: {{dm|date=February 2020}}
• Sergeant at Arms: Newton Lane, until December 8, 1847
• Nathan Sergeant, elected December 8, 1847

• 1846 United States elections (elections leading to this Congress)
• 1846–47 United States Senate elections
• 1846–47 United States House of Representatives elections
• 1848 United States elections (elections during this Congress, leading to the next Congress)
• 1848 United States presidential election
• 1848–49 United States Senate elections
• 1848–49 United States House of Representatives elections

{{Notelist}}

{{reflist}}

• {{cite book | title= The Historical Atlas of Political Parties in the United States Congress | last= Martis | first= Kenneth C. | year= 1989 | publisher= Macmillan Publishing Company | location= New York}}
• {{cite book | title= The Historical Atlas of United States Congressional Districts | last= Martis | first= Kenneth C. | year= 1982 | publisher= Macmillan Publishing Company | location= New York}}

• [http://memory.loc.gov/ammem/amlaw/lwsllink.html Statutes at Large, 1789–1875]
• [http://memory.loc.gov/ammem/amlaw/lwsjlink.html Senate Journal, First Forty-three Sessions of Congress]
• [http://memory.loc.gov/ammem/amlaw/lwhjlink.html#anchor2 House Journal, First Forty-three Sessions of Congress]
• [https://web.archive.org/web/20060601025644/http://www.gpoaccess.gov/serialset/cdocuments/hd108-222/index.html Biographical Directory of the U.S. Congress]
• [http://clerk.house.gov/art_history/house_history/index.html U.S. House of Representatives: House History]
• [https://www.senate.gov/pagelayout/reference/two_column_table/stats_and_lists.htm U.S. Senate: Statistics and Lists]
• {{cite book | title=Congressional Directory for the 30th Congress, 1st Session | url= http://babel.hathitrust.org/cgi/pt?id=njp.32101015060435&seq=13 }}
• {{cite book | title=Congressional Directory for the 30th Congress, 2nd Session | url= https://books.google.com/books?id=g89FAQAAMAAJ|last1 = Congress|first1 = United States|year = 1849}}

{{USCongresses}}