| class="wikitable plainrowheaders sortable" |
| #
! Reached
number one
! Artist(s)
! Single
! Record label
! Weeks at
number one
! Ref |
|---|
| colspan="7" |{{anchor|10}}1940 |
|---|
| 1
| July 27, 1940 | Tommy Dorsey | "I'll Never Smile Again" | Victor | 12 | [{{cite magazine |url=https://worldradiohistory.com/Archive-All-Music/Billboard/40s/1940/Billboard-1940-07-27.pdf |title=Billboard Music Popularity Chart |page=11 |magazine=Billboard |date=July 27, 1940 |access-date=November 13, 2022 |archive-date=August 18, 2020 |archive-url=https://web.archive.org/web/20200818125047/https://worldradiohistory.com/Archive-Billboard/40s/1940/Billboard-1940-07-27.pdf |url-status=live }}] |
| 2
| October 19, 1940 | Bing Crosby | "Only Forever" | Decca | 9 | [{{cite magazine |url=https://worldradiohistory.com/Archive-All-Music/Billboard/40s/1940/Billboard-1940-10%2019.pdf |title=Billboard Music Popularity Chart |page=12 |magazine=Billboard |date=October 19, 1940 |access-date=November 13, 2022 |archive-date=October 8, 2022 |archive-url=https://web.archive.org/web/20221008000002/https://worldradiohistory.com/Archive-All-Music/Billboard/40s/1940/Billboard-1940-10%2019.pdf |url-status=live }}] |
| 3
| December 21, 1940 | Artie Shaw | "Frenesi" | Victor | 12 | [{{cite magazine |url=https://worldradiohistory.com/Archive-All-Music/Billboard/40s/1940/Billboard-1940-12-21.pdf |title=Billboard Music Popularity Chart |page=10 |magazine=Billboard |date=December 21, 1940 |access-date=November 13, 2022 |archive-date=October 8, 2022 |archive-url=https://web.archive.org/web/20221008010607/https://worldradiohistory.com/Archive-All-Music/Billboard/40s/1940/Billboard-1940-12-21.pdf |url-status=live }}] |
| class="unsortable"
! colspan="7" |{{anchor|10}}1941 |
| 4
| March 15, 1941 | Glenn Miller | "Song of the Volga Boatmen" | Bluebird | 1 | [{{cite magazine |url=https://worldradiohistory.com/Archive-All-Music/Billboard/40s/1941/BB-1941-03-15i.pdf |title=Billboard Music Popularity Chart|page=11 |magazine=Billboard |date=March 15, 1941}}] |
| re
| March 22, 1941 | Artie Shaw | "Frenesi" | Victor | 1 | [{{cite magazine |url=https://worldradiohistory.com/Archive-All-Music/Billboard/40s/1941/BB-1941-03-22i.pdf |title=Billboard Music Popularity Chart |page=14 |magazine=Billboard |date=March 22, 1941 |access-date=November 13, 2022 |archive-date=January 31, 2023 |archive-url=https://web.archive.org/web/20230131085839/https://worldradiohistory.com/Archive-All-Music/Billboard/40s/1941/BB-1941-03-22i.pdf |url-status=live }}] |
| 5
| March 29, 1941 | Jimmy Dorsey | "Amapola (Pretty Little Poppy)" | Decca | 10 | [{{cite magazine |url=https://worldradiohistory.com/Archive-All-Music/Billboard/40s/1941/BB-1941-03-29i.pdf |title=Billboard Music Popularity Chart|page=10 |magazine=Billboard |date=March 29, 1941}}] |
| 6
| June 7, 1941 | Jimmy Dorsey | "My Sister and I" | Decca | 1 | [{{cite magazine |url=https://worldradiohistory.com/Archive-All-Music/Billboard/40s/1941/BB-1941-06-07.pdf |title=Billboard Music Popularity Chart|page=10 |magazine=Billboard |date=June 7, 1941}}] |
| 7
| June 14, 1941 | Jimmy Dorsey | "Maria Elena" | Decca | 1 | |
| 8
| June 21, 1941 | Sammy Kaye | "Daddy (Papito)" | Victor | 1 | |
| re
| June 28, 1941 | Jimmy Dorsey | "My Sister and I" | Decca | 1 | |
| re
| July 5, 1941 | Jimmy Dorsey | "Maria Elena" | Decca | 1 | |
| re
| July 12, 1941 | Sammy Kaye | "Daddy (Papito)" | Victor | 7 | |
| 9
| August 30, 1941 | Jimmy Dorsey | "Green Eyes (Aquellos Ojos Verdes)" | Decca | 4 | |
| 10
| September 27, 1941 | Jimmy Dorsey | "Blue Champagne" | Decca | 1 | [{{cite web|url=http://www.bobborst.com/popculture/number-one-songs-by-year/|title=US Number One Songs - 2017|website=Bob Borst's Home of Pop Culture|access-date=February 8, 2013|archive-url=https://web.archive.org/web/20190730060834/http://www.bobborst.com/popculture/number-one-songs-by-year/|archive-date=July 30, 2019|url-status=dead}}] |
| 11
| October 4, 1941 | Freddy Martin | "Piano Concerto in B Flat" | Bluebird | 8 | |
| 12
| November 29, 1941 | Glenn Miller | "Chattanooga Choo Choo" | Bluebird | 3 | |
| 13
| December 20, 1941 | Glenn Miller | "Elmer's Tune" | Bluebird | 1 | |
| re
| December 27, 1941 | Glenn Miller | "Chattanooga Choo Choo" | Bluebird | 6 | |
| class="unsortable"
! colspan="7" |{{anchor|10}}1942 |
| 14
| February 7, 1942 | Glenn Miller | "A String of Pearls" | Bluebird | 1 | |
| 15
| February 14, 1942 | Woody Herman | "Blues in the Night" | Decca | 1 | |
| re
| February 21, 1942 | Glenn Miller | "A String of Pearls" | Bluebird | 1 | |
| 16
| February 28, 1942 | Glenn Miller | "Moonlight Cocktail" | Bluebird | 10 | |
| 17
| May 9, 1942 | Jimmy Dorsey | "Tangerine" | Decca | 6 | |
| 18
| June 20, 1942 | Harry James | "Sleepy Lagoon" | | 4 | |
| 19
| July 18, 1942 | Kay Kyser | "Jingle Jangle Jingle" | Columbia | 8 | |
| 20
| September 12, 1942 | Glenn Miller | "(I've Got a Gal In) Kalamazoo" | Victor | 7 | |
| 21
| October 31, 1942 | Bing Crosby | "White Christmas" | Decca | 11 | |
| class="unsortable"
! colspan="7" |{{anchor|10}}1943 |
| 22
| January 16, 1943 | Tommy Dorsey | "There Are Such Things" | Victor | 4 | |
| 23
| February 13, 1943 | Harry James | "I Had the Craziest Dream" | Columbia | 2 | |
| re
| February 27, 1943 | Tommy Dorsey | "There Are Such Things" | Victor | 1 | |
| 24
| March 6, 1943 | Harry James | "I've Heard That Song Before" | Columbia | 12 | |
| 25
| May 29, 1943 | Glenn Miller | "That Old Black Magic" | Victor | 1 | |
| re
| June 5, 1943 | Harry James | "I've Heard That Song Before" | Columbia | 1 | |
| 26
| June 12, 1943 | Benny Goodman | "Taking A Chance On Love" | Columbia | 3 | |
| 27
| July 3, 1943 | The Song Spinners | "Comin' In On A Wing And A Prayer" | Decca | 3 | |
| 28
| July 24, 1943 | Dick Haymes | "You'll Never Know" | Decca | 4 | |
| 29
| August 21, 1943 | Tommy Dorsey | "In the Blue of Evening" | Victor | 3 | |
| 30
| September 11, 1943 | Bing Crosby | "Sunday, Monday Or Always" | Decca | 7 | |
| 31
| October 30, 1943 | Al Dexter | "Pistol Packin' Mama" | | 1 | |
| 32
| November 6, 1943 | Mills Brothers | "Paper Doll" | Decca | 12 | |
| class="unsortable"
! colspan="7" |{{anchor|10}}1944 |
| 33
| January 29, 1944 | Glen Gray | "My Heart Tells Me (Should I Believe My Heart?)" | Decca | 5 | |
| 34
| March 4, 1944 | Jimmy Dorsey | "Besame Mucho (Kiss Me Much)" | Decca | 7 | |
| 35
| April 22, 1944 | Guy Lombardo | "It's Love-Love-Love" | Decca | 2 | |
| 36
| May 6, 1944 | Bing Crosby | "I Love You" | Decca | 5 | |
| 37
| June 10, 1944 | Harry James | "I'll Get By (As Long as I Have You)" | Columbia | 3 | |
| 38
| July 1, 1944 | Bing Crosby | "I'll Be Seeing You" | Decca | 1 | |
| re
| July 8, 1944 | Harry James | "I'll Get By (As Long as I Have You)" | Columbia | 1 | |
| re
| July 15, 1944 | Bing Crosby | "I'll Be Seeing You" | Decca | 3 | |
| 39
| August 5, 1944 | Bing Crosby | "Swinging On A Star" | Decca | 9 | |
| 40
| October 7, 1944 | Mills Brothers | "You Always Hurt The One You Love" | Decca | 1 | |
| 41
| October 14, 1944 | Dinah Shore | "I'll Walk Alone" | Victor | 1 | |
| re
| October 21, 1944 | Mills Brothers | "You Always Hurt The One You Love" | Decca | 2 | |
| re
| November 4, 1944 | Dinah Shore | "I'll Walk Alone" | Victor | 3 | |
| re
| November 25, 1944 | Mills Brothers | "You Always Hurt The One You Love" | Decca | 2 | |
| 42
| December 9, 1944 | The Ink Spots and Ella Fitzgerald | "I'm Making Believe" | Decca | 2 | |
| 43
| December 23, 1944 | Bing Crosby and The Andrews Sisters | "Don't Fence Me In" | Decca | 8 | |
| class="unsortable"
! colspan="7" |{{anchor|10}}1945 |
| 44
| February 17, 1945 | The Andrews Sisters | "Rum and Coca-Cola" | Decca | 7 | |
| 45
| April 7, 1945 | Les Brown & Doris Day | "My Dreams Are Getting Better All The Time" | Columbia | 7 | |
| 46
| May 26, 1945 | Les Brown & Doris Day | "Sentimental Journey" | Columbia | 9 | |
| 47
| July 28, 1945 | Johnny Mercer | "On the Atchison, Topeka and the Santa Fe" | | 7 | |
| 48
| September 15, 1945 | Perry Como | "Till The End Of Time" | Victor | 9 | |
| 49
| November 17, 1945 | Sammy Kaye | "Chickery Chick" | Victor | 1 | |
| 50
| November 24, 1945 | Harry James | "It's Been A Long, Long Time" | Columbia | 2 | |
| 51
| December 8, 1945 | Bing Crosby and The Les Paul Trio | "It's Been A Long, Long Time" | Decca | 1 | |
| re
| December 15, 1945 | Sammy Kaye | "Chickery Chick" | Victor | 1 | |
| re
| December 22, 1945 | Harry James | "It's Been A Long, Long Time" | Columbia | 1 | |
| re
| December 29, 1945 | Sammy Kaye | "Chickery Chick" | Victor | 1 | |
| class="unsortable"
! colspan="7" |{{anchor|10}}1946 |
| 52
| January 5, 1946 | Freddy Martin | "Symphony" | Victor | 2 | |
| 53
| January 19, 1946 | Bing Crosby and Carmen Cavallaro | "I Can't Begin To Tell You" | Decca | 1 | |
| 54
| January 26, 1946 | Vaughn Monroe | "Let It Snow! Let It Snow! Let It Snow!" | Victor | 5 | |
| 55
| March 2, 1946 | Betty Hutton | "Doctor, Lawyer, Indian Chief" | Capitol | 1 | |
| 56
| March 9, 1946 | Johnny Mercer | "Personality" | Capitol | 1 | |
| 57
| March 16, 1946 | Frankie Carle | "Oh! What it Seemed to Be" | Columbia | 6 | |
| 58
| April 27, 1946 | Sammy Kaye | "I'm A Big Girl Now" | RCA Victor | 1 | |
| 59
| May 4, 1946 | Perry Como
|bgcolor=#FFFF99|"Prisoner of Love"♪ | RCA Victor | 3 | |
| 60
| May 25, 1946 | The Ink Spots | "The Gypsy" | Decca | 10 | |
| 61
| August 3, 1946 | Perry Como | "Surrender" | RCA Victor | 1 | |
| 62
| August 10, 1946 | Eddy Howard | "To Each His Own" | Majestic | 3 | |
| 63
| August 31, 1946 | Freddy Martin | "To Each His Own" | RCA Victor | 2 | |
| 64
| September 14, 1946 | Frank Sinatra | "Five Minutes More" | Columbia | 1 | |
| 65
| September 21, 1946 | The Ink Spots | "To Each His Own" | Decca | 1 | |
| re
| September 28, 1946 | Frank Sinatra | "Five Minutes More" | Columbia | 1 | |
| re
| October 5, 1946 | Eddy Howard | "To Each His Own" | Majestic | 2 | |
| 66
| October 19, 1946 | Frankie Carle | "Rumors Are Flying" | Columbia | 8 | |
| 67
| December 14, 1946 | Kay Kyser | "Ole Buttermilk Sky" | Columbia | 2 | |
| 68
| December 28, 1946 | Sammy Kaye | "The Old Lamp-Lighter" | RCA Victor | 7 | |
| class="unsortable"
! colspan="7" |{{anchor|10}}1947 |
| 69
| February 15, 1947 | The King Cole Trio | "(I Love You) For Sentimental Reasons" | Capitol | 1 | |
| 70
| February 22, 1947 | Count Basie | "Open The Door, Richard!" | RCA Victor | 1 | |
| 71
| March 1, 1947 | Freddy Martin | "Managua, Nicaragua" | RCA Victor | 2 | |
| 72
| March 15, 1947 | Ted Weems | "Heartaches" | RCA Victor | 12 | |
| 73
| June 7, 1947 | Art Lund | "Mam'selle" | MGM | 2 | |
| 74
| June 21, 1947 | The Harmonicats | "Peg O' My Heart" | Vitacoustic | 1 | |
| 75
| June 28, 1947 | Perry Como | "Chi-Baba, Chi-Baba (My Bambino Go to Sleep)" | RCA Victor | 3 | |
| re
| July 19, 1947 | The Harmonicats | "Peg O' My Heart" | Vitacoustic | 3 | |
| 76
| August 9, 1947 | Tex Williams | "Smoke! Smoke! Smoke! (That Cigarette)" | Capitol | 6 | |
| 77
| September 20, 1947 | Francis Craig
|bgcolor=#FFFF99|"Near You"♪ | Bullet | 12 | |
| 78
| December 13, 1947 | Vaughn Monroe | "Ballerina" | RCA Victor | 10 | |
| class="unsortable"
! colspan="7" |{{anchor|10}}1948 |
| 79
| February 21, 1948 | Art Mooney | "I'm Looking Over a Four Leaf Clover" | MGM | 3 | |
| 80
| March 13, 1948 | Peggy Lee | "Mañana (Is Soon Enough for Me)" | Capitol | 9 | |
| 81
| May 15, 1948 | Nat King Cole | "Nature Boy" | Capitol | 7 | |
| 82
| July 3, 1948 | Kay Kyser | "Woody Wood-Pecker" | Columbia | 6 | |
| 83
| August 14, 1948 | Al Trace | "You Call Everybody Darlin'" | Regent | 2 | |
| 84
| August 28, 1948 | Pee Wee Hunt | "Twelfth Street Rag" | Capitol | 6 | |
| 85
| October 9, 1948 | Margaret Whiting | "A Tree In The Meadow" | Capitol | 2 | |
| re
| October 23, 1948 | Pee Wee Hunt
|bgcolor=#FFFF99|"Twelfth Street Rag"♪ | Capitol | 2 | |
| 86
| November 6, 1948 | Dinah Shore | "Buttons And Bows" | Columbia | 9 | |
| class="unsortable"
! colspan="7" |{{anchor|10}}1949 |
| 87
| January 8, 1949 | Spike Jones | "All I Want For Christmas (Is My Two Front Teeth)" | RCA Victor | 1 | |
| re
| January 15, 1949 | Dinah Shore | "Buttons and Bows" | Columbia | 1 | |
| 88
| January 22, 1949 | Evelyn Knight | "A Little Bird Told Me" | Decca | 7 | |
| 89
| March 12, 1949 | Blue Barron | "Cruising Down the River" | MGM | 2 | |
| 90
| March 26, 1949 | Russ Morgan | "Cruising Down the River" | Decca | 7 | |
| 91
| May 14, 1949 | Vaughn Monroe
|bgcolor=#FFFF99|"Riders in the Sky (A Cowboy Legend)"♪ | RCA Victor | 11 | |
| 92
| July 30, 1949 | Perry Como | "Some Enchanted Evening" | RCA Victor | 5 | |
| 93
| September 3, 1949 | Vic Damone | "You're Breaking My Heart" | Mercury | 4 | |
| 94
| October 1, 1949 | Frankie Laine | "That Lucky Old Sun" | Mercury | 8 | |
| 95
| November 26, 1949 | Frankie Laine | "Mule Train" | Mercury | 6 | |
