Original Wasco County Courthouse

{{Use mdy dates|date=August 2023}}

{{Infobox nrhp

| name = First Wasco County Courthouse

| nrhp_type = cp

| nocat = yes

| partof = Trevitt's Addition Historic District{{citation | last1 = Donovan | first1 = Sally | last2 = Howard | first2 = Bruce | title = National Register of Historic Places Registration Form: Trevitt's Addition Historic District | date = July 30, 1994 }}

| partof_refnum = 95000686

| image = First Wasco County Courthouse - The Dalles Oregon.jpg

| alt = Photograph showing a front view of the Original Wasco County Courthouse, a two-story, wood-frame building with horizontal wooden siding beneath a peaked roof. An exterior stairway leads up the right side of the building, and a covered porch extends across the width of the front of the ground floor. The main doors are centered on the porch and a large sign hangs at the center-front of the porch reading: "Wasco County 1859 / ORIGINAL COURT HOUSE / 401 West Second Place".

| caption =

| location = 410 W. 2nd Place
The Dalles, Oregon

| coordinates = {{coord|45.603632|-121.188554|region:US-OR_type:landmark|format=dms|display=inline,title}}

| locmapin = USA Oregon The Dalles

| area =

| built = 1859{{citation|last=Oregon Parks and Recreation Department|authorlink= Oregon Parks and Recreation Department|date=October 19, 2009|title=Oregon National Register List|url=http://www.oregonheritage.org/OPRD/HCD/NATREG/docs/oregon_nr_list.pdf|accessdate=April 1, 2010}}

| sigdate1_label = First listed on NRHP

| sigdate1 = November 16, 1977

| sigdate2_label = First de-listed

| sigdate2 = March 18, 1998

| sigdate3_label = Re-listed

| sigdate3 = March 18, 1998

| architecture =

| refnum = 98000260
(previously 77001116)

}}

The Original Wasco County Courthouse is a historic former courthouse, located in The Dalles, Oregon, United States. It is listed on the National Register of Historic Places under the name First Wasco County Courthouse, and is also listed as a contributing resource in the National Register-listed Trevitt's Addition Historic District.

One of only two remaining courthouses from prior to Oregon statehood, this building served Wasco County from 1859 until 1882, and then as The Dalles city hall until 1907. From its original location in downtown The Dalles, it has been moved several times before its current location within Trevitt's Addition Historic District.

As of 2010, it was managed as a museum by the Wasco County Historical Society.{{cite web |url=http://www.historicthedalles.org/wcoc/original_wasco_co_courthouse.htm |title=The Original Wasco County Courthouse |author=Wasco County Historical Society |accessdate=April 1, 2010 }}