Washington County, Georgia
Location within the U.S. state of Georgia
Georgia's location within the U.S.
|Founded||February 25, 1784|
|Named for||George Washington|
|• Total||684 sq mi (1,770 km2)|
|• Land||678 sq mi (1,760 km2)|
|• Water||5.9 sq mi (15 km2) 0.9%%|
| • Estimate |
|• Density||31/sq mi (12/km2)|
|Time zone||UTC−5 ( Eastern)|
|• Summer ( DST)||UTC−4 ( EDT)|
Washington County is a county located in the U.S. state of Georgia. As of the 2010 census, the population was 21,187.  The county seat is Sandersville.  The county was established on February 25, 1784. It was named for Revolutionary War general (and afterward President of the United States) George Washington. 
The western portion of Washington County, west of a north-to-south line running through Sandersville, is located in the Lower Oconee River sub-basin of the Altamaha River basin. The northeastern portion of the county, north of Riddleville, is located in the Upper Ogeechee River sub-basin of the Ogeechee River basin, while the southeastern portion, centered on Harrison, is located in the Ohoopee River sub-basin of the Altamaha River basin. 
- Glascock County (northeast)
- Jefferson County (east)
- Johnson County (south)
- Wilkinson County (southwest)
- Baldwin County (west)
- Hancock County (northwest)
|U.S. Decennial Census
1790-1960  1900-1990 
1990-2000  2010-2013 
As of the 2010 United States Census, there were 21,187 people, 7,547 households, and 5,269 families living in the county.  The population density was 31.2 inhabitants per square mile (12.0/km2). There were 9,047 housing units at an average density of 13.3 per square mile (5.1/km2).  The racial makeup of the county was 52.7% black or African American, 45.0% white, 0.5% Asian, 0.1% American Indian, 0.7% from other races, and 1.0% from two or more races. Those of Hispanic or Latino origin made up 1.9% of the population.  In terms of ancestry, 10.4% were American. 
Of the 7,547 households, 35.4% had children under the age of 18 living with them, 42.8% were married couples living together, 22.4% had a female householder with no husband present, 30.2% were non-families, and 27.2% of all households were made up of individuals. The average household size was 2.56 and the average family size was 3.10. The median age was 38.9 years. 
The median income for a household in the county was $31,382 and the median income for a family was $41,055. Males had a median income of $35,699 versus $24,860 for females. The per capita income for the county was $15,033. About 19.0% of families and 27.6% of the population were below the poverty line, including 35.6% of those under age 18 and 18.2% of those age 65 or over. 
As of the census  of 2000, there were 21,176 people, 7,435 households, and 5,382 families living in the county. The population density was 31 people per square mile (12/km²). There were 8,327 housing units at an average density of 12 per square mile (5/km²). The racial makeup of the county was 53.20% Black or African American, 45.73% White, 0.17% Native American, 0.26% Asian, 0.01% Pacific Islander, 0.20% from other races, and 0.43% from two or more races. 0.63% of the population were Hispanic or Latino of any race.
There were 7,435 households out of which 34.60% had children under the age of 18 living with them, 46.70% were married couples living together, 21.50% had a female householder with no husband present, and 27.60% were non-families. 24.80% of all households were made up of individuals and 10.60% had someone living alone who was 65 years of age or older. The average household size was 2.65 and the average family size was 3.17.
In the county, the population was spread out with 26.90% under the age of 18, 8.80% from 18 to 24, 30.30% from 25 to 44, 21.40% from 45 to 64, and 12.60% who were 65 years of age or older. The median age was 36 years. For every 100 females there were 81.50 males. For every 100 females age 18 and over, there were 75.20 males. The median income for a household in the county was $29,910, and the median income for a family was $36,325. Males had a median income of $33,263 versus $21,388 for females. The per capita income for the county was $15,565. About 18.70% of families and 22.90% of the population were below the poverty line, including 30.00% of those under age 18 and 23.20% of those age 65 or over.
The county is served by the Washington County School District, which includes: 
- Ridge Road Elementary School
- T.J. Elder Middle School
- Washington County High School.
The county is also the location of one privately run school:
- Brentwood School
The 1933 short story The People's Choice by Erskine Caldwell is set in Washington County, where the story's protagonist is a popular local politician elected again and again as the county's tax assessor.
The biography of one of the main characters (Grant Alexander) in the 2011 console game "X-Men: Destiny" states that they were born in Sandersville, Georgia.
Like most other majority-minority counties in the South, Washington County has primarily backed Democratic Party candidates for most of its history. Democratic margins of victory in presidential elections were far greater prior to 1964, but the county has only failed to back a Democratic presidential candidate five times in its history. However, no candidate of any party since Bill Clinton in 1996 has managed to win the county by a margin of 1,000 votes or greater.
- Central Savannah River Area
- National Register of Historic Places listings in Washington County, Georgia
- "State & County QuickFacts". United States Census Bureau. Retrieved June 27, 2014.
- "Find a County". National Association of Counties. Retrieved June 7, 2011.
- Krakow, Kenneth K. (1975). Georgia Place-Names: Their History and Origins (PDF). Macon, GA: Winship Press. p. 247. ISBN 0-915430-00-2.
- "US Gazetteer files: 2010, 2000, and 1990". United States Census Bureau. February 12, 2011. Retrieved April 23, 2011.
- "Georgia Soil and Water Conservation Commission Interactive Mapping Experience". Georgia Soil and Water Conservation Commission. Retrieved November 20, 2015.
- "Population and Housing Unit Estimates". Retrieved July 31, 2019.
- "U.S. Decennial Census". United States Census Bureau. Retrieved June 27, 2014.
- "Historical Census Browser". University of Virginia Library. Retrieved June 27, 2014.
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- "Census 2000 PHC-T-4. Ranking Tables for Counties: 1990 and 2000" (PDF). United States Census Bureau. Retrieved June 27, 2014.
- "DP-1 Profile of General Population and Housing Characteristics: 2010 Demographic Profile Data". United States Census Bureau. Archived from the original on February 13, 2020. Retrieved December 30, 2015.
- "Population, Housing Units, Area, and Density: 2010 - County". United States Census Bureau. Archived from the original on February 13, 2020. Retrieved December 30, 2015.
- "DP02 SELECTED SOCIAL CHARACTERISTICS IN THE UNITED STATES – 2006-2010 American Community Survey 5-Year Estimates". United States Census Bureau. Archived from the original on February 13, 2020. Retrieved December 30, 2015.
- "DP03 SELECTED ECONOMIC CHARACTERISTICS – 2006-2010 American Community Survey 5-Year Estimates". United States Census Bureau. Archived from the original on February 13, 2020. Retrieved December 30, 2015.
- "U.S. Census website". United States Census Bureau. Retrieved January 31, 2008.
- District, Washington County School. "Washington County Board of Education - Washington County Board of Education Listing". Retrieved May 26, 2009.
- Leip, David. "Dave Leip's Atlas of U.S. Presidential Elections". uselectionatlas.org. Retrieved March 24, 2018.
- Ella Mitchell, History of Washington County. Atlanta, GA: Byrd Printing Company, 1924. —Reissued 1973.