Washington County is a county in the U.S. state of Idaho. As of the 2020 census, the population was 10,500. 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.

Geography

According to the U.S. Census Bureau, the county has a total area of , of which is land and (1.4%) is water.

Adjacent counties

  • Adams County - north
  • Gem County - east
  • Payette County - south
  • Malheur County, Oregon - southwest
  • Baker County, Oregon - west

Major highways

  • 20px US 95

National protected areas

  • Boise National Forest (part)
  • Deer Flat National Wildlife Refuge (part)
  • Payette National Forest (part)

Rivers

  • Snake River
  • Weiser River

Reservoirs

  • Brownlee
  • Crane Creek
  • Mann Creek
  • Paddock Valley

Demographics

2020 census

As of the 2020 census, the county had a population of 10,500 and a median age of 46.0 years. 23.4% of residents were under the age of 18 and 26.0% of residents were 65 years of age or older. For every 100 females there were 96.8 males, and for every 100 females age 18 and over there were 95.0 males age 18 and over.

The 2020 census recorded 4,087 households in the county, of which 28.7% had children under the age of 18 living with them and 22.9% had a female householder with no spouse or partner present. About 25.0% of all households were made up of individuals and 14.2% had someone living alone who was 65 years of age or older.

The 2020 census reported that 52.4% of residents lived in urban areas, while 47.6% lived in rural areas.

Racial and ethnic composition

Note: the US Census treats Hispanic/Latino as an ethnic category. This table excludes Latinos from the racial categories and assigns them to a separate category. Hispanics/Latinos can be of any race.

{| class="wikitable"

|+Washington County racial composition <br> (NH = Non-Hispanic)

!Race

!Pop 2010

!Pop 2020

!% 2010

!% 2020

|-

|White (NH)

|8,166

|8,118

|80.07%

|77.31%

|-

|Black or African American (NH)

|10

|17

|0.1%

|0.16%

|-

|Native American or Alaska Native (NH)

|75

|74

|0.74%

|0.7%

|-

|Asian (NH)

|90

|81

|0.88%

|0.77%

|-

|Pacific Islander (NH)

|3

|7

|0.03%

|0.07%

|-

|Some Other Race (NH)

|12

|53

|0.12%

|0.5%

|-

|Mixed/Multi-Racial (NH)

|126

|488

|1.24%

|4.65%

|-

|Hispanic or Latino

|1,716

|1,662

|16.83%

|15.83%

|-

|Total

|10,198

|10,500

|

|

|}

2010 census

As of the 2010 United States census, there were 10,198 people, 4,034 households, and 2,803 families living in the county. The population density was . There were 4,529 housing units at an average density of . The racial makeup of the county was 86.6% white, 1.0% American Indian, 0.9% Asian, 0.2% black or African American, 9.1% from other races, and 2.2% from two or more races. Those of Hispanic or Latino origin made up 16.8% of the population.

Of the 4,034 households, 30.4% had children under the age of 18 living with them, 54.9% were married couples living together, 9.7% had a female householder with no husband present, 30.5% were non-families, and 25.8% of all households were made up of individuals. The average household size was 2.50 and the average family size was 2.99. The median age was 43.6 years.

Education

The county is served by three school districts based in the county:

  • Weiser District #431
  • Weiser High School
  • Weiser Middle School
  • Park Intermediate School
  • Pioneer Primary School.
  • Cambridge Joint District #432
  • Midvale Senior High School.
  • Midvale Junior High School
  • Midvale Elementary School

Additionally Payette Joint School District 371 includes a portion of Washington County.

Washington County is in the area (but not the taxing region) of the College of Western Idaho, which has its main campus in Nampa.

Communities

Cities

  • Cambridge
  • Midvale
  • Weiser

Politics

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Healthcare

The county is served by the Southwest Idaho Health District.

See also

  • National Register of Historic Places listings in Washington County, Idaho

References

  • County Parcel Map
  • State of Idaho official site - Washington County