Washington County is named for George Washington, who was the first President of the United States from 1789 to 1797.
Surrounding County Courthouses:
N – Columbia County
E – Multnomah County and Clackamas County
S – Clackamas County and Yamhill County
W – Tillamook County
Created: July 5, 1843 
County Seat:
Hillsboro 1843 – present
County Courthouse – Hillsboro
Location: 145 Northeast Second Avenue / East Main Street
Built: 1928 – 1929
Style: Neo-Classical
Architect: O R W Hossack
Contractor: L L Young
Description: The building faces east and is a three story buff colored brick and concrete structure. The building is located on landscaped grounds in the center of Hillsboro. The east front has a projecting center section with four large columns rising to a wide header below the roof line. The building is connected on the west side to the Justice Services Building. There are large sequoia trees surrounding the building. On the north side is the Public Safety Building.
County Justice Services Building – Hillsboro
Location: 150 Northeast First Avenue / NE Lincoln Street
Built: 1968 – 1970
Style: Modern
Architect: Annand-Boone Architects
Contractor: Todd Building Company
Description: The building faces west and is a four story concrete and glass structure. The building is located on landscaped grounds in the city center to the west of the courthouse. The west front has a center section which projects from the building and has square towers on either side of the recessed entrance. The towers rise above the flat roof line. The windows are horizontal. The building is connected to the courthouse on the east side. The building was remodeled in 1990 to 1992. The architect was GBD Architects of Portland and the contractor was LD Maltson, Inc. of Salem. The construction manager was Swinney and Associates of Portland.
County Juvenile Services Building – Hillsboro
Location: 222 NE First Avenue / NE Lincoln Street
Built: 1991 – 1993
Style: Modern
Architect: Lee-Ruff-Stark, Architects of Portland
Contractor: L D Mattson, Associates of Salem
Description: The building faces west and is a two story buff colored brick and concrete structure. The building is located on landscaped grounds in the city center to the north of the courthouse. The west front has a central curved entrance with glass walls on the first story. The windows are square and the roof line is flat.
County Administration – Hillsboro
Location: 155 Northeast First Avenue / NW Lincoln Street
Built: 1988 – 1990
Style: Modern
Architect: Yosy Grube Hall
Contractor: Howard S Wright
Description: The building faces east and is a three story concrete structure. The building is located on landscaped grounds in the city center to the west of the courthouse. The building is the Charles D Cameron Public Services Building. The east front has a central entrance. The roof line is flat.
County Public Safety Building – Hillsboro
Location: Northeast Lincoln Street / Northeast First Avenue
Built: 1968 – 1971
Style: Modern
Architect: Annand-Boone-Dynan-Huffstutter
Contractor: Todd Building Company
Description: The building faces north and is a three story white colored concrete and glass structure. The building is located on landscaped grounds in the city center on the north side of the courthouse. The north front has a projecting center section with recessed entrance on the first story. Along the east and west sides are horizontal windows with concrete dividers. The roof line is flat. The building is attached to the courthouse on the south side and was constructed as a jail.
County Courthouse – Hillsboro
County Justice Services Building
County Juvenile Services Building
County Administration
County Public Safety Building
Photos taken 2012 and 2016