Washington County is named for George Washington, who was the first President of the United States from 1789 to 1797.
Surrounding County Courthouses:
N – Chautauqua County, Kansas and Montgomery County, Kansas
E – Nowata County and Rogers County
S – Tulsa County
W – Osage County
Created: July 16, 1907 
County Seat:
Bartlesville 1907 – present
County Courthouse – Bartlesville
Location: 420 Johnstone Avenue / East 5th Street
Built: 1931 – 1932
Style: Federal
Architect: James A Wetmore
Contractor: Unknown
Description: The building faces west and is a three story red colored brick and concrete structure. The building is located in the center of Bartlesville. The first story has arched windows and entrances. There is stone trim along the corners. The hipped roof is red colored tiles. The building was erected as the United States District Courthouse for the Northern District of the State of Oklahoma. The building houses the County District Court of the 11th Judicial District as of 1972. To the north is the County administration Building.
Old County Courthouse – Bartlesville
Location: 400 Frank Phillips Boulevard / Delaware Avenue
Built: 1913 – 1914
Style: Neo-Classical
Architect: Patrick Henry Weathers of Jackson, Mississippi
Contractor: Inland Construction Company
Description: The building faces west and is a three story colored buff brick and concrete structure. The building is located on landscaped grounds in the center of Bartlesville to the northeast of the courthouse. The building has a raised basement. The west front has a large arch rising above the roof line. The entrance is recessed. A wide cornice runs below the third story. The east end of the building is curved. The roof line is flat. In the interior, the former courtroom was located at the east side of the second story. The building is now an office building.
See: The 11th Judicial District includes Nowata County.
History: The county was created in 1907 and Bartlesville was selected as the county seat. The county rented premises until the first courthouse was constructed in 1913 to 1914 at a cost of $115,000. The second and present courthouse was constructed in 1931 to 1932 and occupied as the courthouse in 1972.
County Courthouse – Bartlesville
Old County Courthouse – Bartlesville
County Administration Building – Bartlesville
Photos taken 2010