Washington County, Ohio
|Washington County, Ohio|
Washington County Courthouse
Location in the state of Ohio
Ohio's location in the U.S.
|Founded||27 July, 1788|
|Named for||George Washington|
|• Total||640.00 sq mi (1,658 km2)|
|• Land||631.97 sq mi (1,637 km2)|
|• Water||8.02 sq mi (21 km2), 1.25%|
|• Density||97.8/sq mi (38/km²)|
|Time zone||Eastern: UTC-5/-4|
Washington County is a county located in the state of Ohio. According to the 2010 census, it has a population of 61,778, which is a decrease of 2.3% from 63,251 in 2000. Its county seat is Marietta. The county, the oldest in the state, is named for George Washington. Washington County is included in the Parkersburg-Marietta-Vienna, West Virginia-Ohio Metropolitan Statistical Area.
According to the 2010 census, the county has a total area of 640.00 square miles (1,657.6 km2), of which 631.97 square miles (1,636.8 km2) (or 98.75%) is land and 8.02 square miles (20.8 km2) (or 1.25%) is water.
Washington County's southern and eastern boundary is the Ohio River. The Muskingum River, Little Muskingum River, Duck Creek, and the Little Hocking River flow through the county to the Ohio River.
- Noble County (north)
- Monroe County (northeast)
- Tyler County, West Virginia (east)
- Pleasants County, West Virginia (southeast)
- Wood County, West Virginia (south)
- Athens County (southwest)
- Morgan County (northwest)
- Wayne National Forest (part)
- Boord State Nature Preserve
As of the census of 2000, there were 63,251 people, 25,137 households, and 17,671 families residing in the county. The population density was 100 people per square mile (38/km²). There were 27,760 housing units at an average density of 44 per square mile (17/km²). The racial makeup of the county was 97.33% White, 0.92% Black or African American, 0.24% Native American, 0.43% Asian, 0.05% Pacific Islander, 0.13% from other races, and 0.89% from two or more races. 0.51% of the population were Hispanic or Latino of any race. 29.5% were of German, 23.4% American, 12.3% English and 11.0% Irish ancestry according to Census 2000.
There were 25,137 households out of which 30.90% had children under the age of 18 living with them, 57.90% were married couples living together, 9.10% had a female householder with no husband present, and 29.70% were non-families. 25.40% of all households were made up of individuals and 11.20% had someone living alone who was 65 years of age or older. The average household size was 2.45 and the average family size was 2.93.
In the county, the population was spread out with 23.50% under the age of 18, 8.80% from 18 to 24, 27.50% from 25 to 44, 25.10% from 45 to 64, and 15.00% who were 65 years of age or older. The median age was 39 years. For every 100 females there were 94.60 males. For every 100 females age 18 and over, there were 91.00 males.
The median income for a household in the county was $34,275, and the median income for a family was $41,605. Males had a median income of $32,034 versus $21,346 for females. The per capita income for the county was $18,082. About 8.60% of families and 11.40% of the population were below the poverty line, including 15.70% of those under age 18 and 10.20% of those age 65 or over.
Washington County has a 3 member Board of County Commissioners that oversee the various County departments, similar to all but 2 of the 88 Ohio counties. Washington County's elected commissioners are: Tim Irvine (R), David White (R), and Ron Feathers (R). 
- Covered bridges of southeast Ohio
- National Register of Historic Places listings in Washington County, Ohio
- "Ohio County Profiles: Washington County" (PDF). Ohio Department of Development. Retrieved 2007-04-28.
- "Washington County QuickFacts". United States Census Bureau. Retrieved 2012-02-16.
- "Find a County". National Association of Counties. Retrieved 2011-06-07.
- "Washington County data". Ohio State University Extension Data Center. Retrieved 2007-04-28.[dead link]
- "US Gazetteer files: 2010, 2000, and 1990". United States Census Bureau. 2011-02-12. Retrieved 2011-04-23.
- Ohio Atlas & Gazetteer. Yarmouth, Me.: DeLorme. 1991. pp. 71–73, 80–81. ISBN 0-89933-233-1.
- "U.S. Decennial Census". Census.gov. Retrieved November 7, 2013.
- "American FactFinder". United States Census Bureau. Retrieved 2008-01-31.
- "Washington County Board of Commissioners". Washington County Ohio Homepage. Retrieved November 29, 2013.
||Morgan County||Noble County||Monroe County|
|Tyler County, West Virginia|
|Athens County||Wood County, West Virginia||Pleasants County, West Virginia|