Washington County

Washington County is the name of 30 counties and one parish in the United States of America, each named for George Washington, revolutionary war general and first President of the United States. In total, the following 32 states and one district have or had a Washington County:

Extant counties

Former counties

Other

See also

Washington County, Oregon

Washington County is one of 36 counties in the U.S. state of Oregon. As of the 2010 census, the population was 529,710, making it the second most populous county in the state. The county seat and largest city is Hillsboro.

Washington County is included in the Portland-Vancouver-Hillsboro, OR-WA Metropolitan Statistical Area.

Cities in Washington County include Hillsboro, Beaverton, Tigard, and Forest Grove, the oldest city in the county.

Originally named Twality when created in 1843, the territorial legislature renamed it for the first president of the United States, George Washington, in 1849. The original boundaries included the entire northwest corner of Oregon before sections became new counties. The Tualatin River and its drainage basin are almost entirely within the county, with the county nearly coterminous with the Tualatin Valley. It is bordered on the west and north by the Northern Oregon Coast Range, on the south by the Chehalem Mountains, and on the north and east by the Tualatin Mountains (or West Hills).

Washington County, Idaho

Washington County is a county in the U.S. state of Idaho. As of the 2010 census, the population was 10,198. The county seat and largest city is Weiser, with over half of the county's population. The county was established in 1879 when Idaho was a territory and named after U.S. president George Washington.

Washington County is home to the Idaho ground squirrel.

Geography

According to the U.S. Census Bureau, the county has a total area of 1,474 square miles (3,820 km²), of which 1,453 square miles (3,760 km²) is land and 21 square miles (54 km²) (1.4%) is water.

Adjacent counties

Major highways

US 95

SH-71

National protected areas

Rivers

Reservoirs

Demographics

2000 census

As of the census of 2000, there were 9,977 people, 3,762 households, and 2,738 families residing in the county. The population density was 7 people per square mile (3/km²). There were 4,138 housing units at an average density of 3 per square mile (1/km²). The racial makeup of the county was 87.61% White, 1.03% Asian, 0.66% Native American, 0.10% Black or African American, 0.07% Pacific Islander, 8.17% from other races, and 2.36% from two or more races. 13.75% of the population were Hispanic or Latino of any race. 15.7% were of German, 14.3% English, 10.1% American and 7.7% Irish ancestry according to Census 2000.