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:
- Washington County, South Dakota, a former county (1883–1943) that was divided and then merged into Jackson County, Pennington County, and Shannon County in 1943 because of financial troubles in South Dakota
- Washington County, District of Columbia, a former county of the District of Columbia that was abolished in 1871 along with all of the other counties in that District
- Washington County (album), a 1970 album by Arlo Guthrie
|This disambiguation page lists articles associated with the title Washington County.
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