|Stevens County, Washington|
Stevens County Courthouse in Colville
Location within the U.S. state of Washington
Washington's location within the U.S.
|Founded||January 20, 1863|
|Named for||Isaac Stevens|
|• Total||2,541 sq mi (6,581 km2)|
|• Land||2,478 sq mi (6,418 km2)|
|• Water||63 sq mi (163 km2), 2.5%|
|• ( 2017)||44,730|
|• Density||18/sq mi (7/km2)|
|Time zone||Pacific: UTC−8/ −7|
Stevens County is a county located in the U.S. state of Washington along the Canada–US border. As of the 2014 United States Census, its population was 43,650.  As of July 2016, the population was estimated to be 44,439. The county seat and largest city is Colville.  The county was created in 1863  and named after Isaac Stevens, the first governor of Washington Territory.
- Pend Oreille County – east
- Spokane County – southeast
- Lincoln County – southwest
- Ferry County – west
- Kootenay Boundary Regional District, British Columbia – northeast
- Regional District of Central Kootenay, British Columbia – north
- Pacific Northwest National Scenic Trail (part)
- Colville National Forest (part)
- Kaniksu National Forest (part)
- Lake Roosevelt National Recreation Area (part)
- Little Pend Oreille National Wildlife Refuge (part)
|U.S. Decennial Census
1790–1960  1900–1990 
1990–2000  2010–2016 
As of the census  of 2000, there were 40,066 people, 15,017 households, and 11,022 families residing in the county. The population density was 16 people per square mile (6/km²). There were 17,599 housing units at an average density of 7 per square mile (3/km²). The racial makeup of the county was 90.05% White, 0.28% Black or African American, 5.66% Native American, 0.48% Asian, 0.16% Pacific Islander, 0.68% from other races, and 2.70% from two or more races. 1.84% of the population were Hispanic or Latino of any race. 20.6% were of German, 18.9% United States or American, 10.0% English, 7.9% Irish and 5.0% Norwegian ancestry.
There were 15,017 households out of which 34.40% had children under the age of 18 living with them, 60.40% were married couples living together, 8.70% had a female householder with no husband present, and 26.60% were non-families. 22.00% of all households were made up of individuals and 8.80% had someone living alone who was 65 years of age or older. The average household size was 2.64 and the average family size was 3.08.
In the county, the population was spread out with 28.70% under the age of 18, 6.40% from 18 to 24, 24.90% from 25 to 44, 27.10% from 45 to 64, and 12.90% who were 65 years of age or older. The median age was 39 years. For every 100 females there were 99.10 males. For every 100 females age 18 and over, there were 96.60 males.
The median income for a household in the county was $34,673, and the median income for a family was $40,250. Males had a median income of $35,256 versus $23,679 for females. The per capita income for the county was $15,895. About 11.50% of families and 15.90% of the population were below the poverty line, including 19.80% of those under age 18 and 11.90% of those age 65 or over.
As of the 2010 United States Census, the population density was 17.6 inhabitants per square mile (6.8/km2). There were 21,156 housing units at an average density of 8.5 per square mile (3.3/km2).  The racial makeup of the county was 88.9% White, 0.6% Black or African American, 1.5% Native American, 1.5% Asian, 0.2% Pacific Islander, 3.5% from other races, 3.7% two or more races. Those of Hispanic or Latino origin made up 2.7% of the population.  In terms of ancestry, 24.6% were German, 14.2% were Irish, 13.7% were English, 6.4% were Norwegian, and 6.1% were American. 
Of the households, 29.6% had children under the age of 18 living with them, 56.3% were married couples living together, 9.0% had a female householder with no husband present, 29.9% were non-families, and 24.6% of all households were made up of individuals. The average household size was 2.50 and the average family size was 2.95. The median age was 45.0 years. 
The median income for a household in the county was $42,845 and the median income for a family was $51,544. Males had a median income of $46,721 versus $33,651 for females. The per capita income for the county was $21,773. About 11.0% of families and 15.1% of the population were below the poverty line, including 21.1% of those under age 18 and 9.3% of those age 65 or over. 
- "State & County QuickFacts". United States Census Bureau. Retrieved January 7, 2014.
- "Find a County". National Association of Counties. Archived from the original on May 31, 2011. Retrieved June 7, 2011.
- "2010 Census Gazetteer Files". United States Census Bureau. August 22, 2012. Retrieved July 16, 2015.
- "Population and Housing Unit Estimates". Retrieved April 4, 2018.
- "U.S. Decennial Census". United States Census Bureau. Archived from the original on May 12, 2015. Retrieved January 7, 2014.
- "Historical Census Browser". University of Virginia Library. Retrieved January 7, 2014.
- "Population of Counties by Decennial Census: 1900 to 1990". United States Census Bureau. Retrieved January 7, 2014.
- "Census 2000 PHC-T-4. Ranking Tables for Counties: 1990 and 2000" (PDF). United States Census Bureau. Retrieved January 7, 2014.
- "American FactFinder". United States Census Bureau. Archived from the original on September 11, 2013. Retrieved May 14, 2011.
- "DP-1 Profile of General Population and Housing Characteristics: 2010 Demographic Profile Data". United States Census Bureau. Retrieved March 6, 2016.
- "Population, Housing Units, Area, and Density: 2010 – County". United States Census Bureau. Retrieved March 6, 2016.
- "DP02 SELECTED SOCIAL CHARACTERISTICS IN THE UNITED STATES – 2006–2010 American Community Survey 5-Year Estimates". United States Census Bureau. Retrieved March 6, 2016.
- "DP03 SELECTED ECONOMIC CHARACTERISTICS – 2006–2010 American Community Survey 5-Year Estimates". United States Census Bureau. Retrieved March 6, 2016.
- Leip, David. "Dave Leip's Atlas of U.S. Presidential Elections". uselectionatlas.org. Retrieved April 10, 2018.
- The leading "other" candidate, Progressive Theodore Roosevelt, received 1,971 votes, while Socialist candidate Eugene Debs received 988 votes, Prohibition candidate Eugene Chafin received 227 votes, and Socialist Labor candidate Arthur Reimer received 26 votes.
- An illustrated history of Stevens, Ferry, Okanogan and Chelan counties, State of Washington. Western Historical Pub. Co. 1904. Available online through the Washington State Library's Classics in Washington History collection
- Stevens County, Washington Government Page
- The Stevens County Wiki Project: A community wiki project, dedicated to creating an online wiki guide to Stevens County, Washington. Powered by Media Wiki.
- Stevens County Rural Library District: hosts of the Stevens County Wiki Project, the Stevens County Library District (SCRLD) has various regional links available from their website.
- Stevens County Heritage Historical photos and documents from the Libraries of Stevens County.
- uppercolumbia.net: a regional portal site for Stevens County and beyond. Includes business links and events calendar.
- The Heritage Network: History and Genealogy Resources for the Upper Columbia Region.
- An 1884 hailstorm in Stevens County on Wikisource
- Crossroads on the Columbia Preserve America Project Interpretive Section
- Crossroads on the Columbia Preserve America Project collection, exhibits, and images from museum and private collections covering Stevens County