See also: List of counties in Washington for counties in the state of Washington.
Washington County is the name of 30 counties and one parish in the United States of America, all named for George Washington. It is the most common county name in the United States.
Extant counties
- Washington County, Alabama
- Washington County, Arkansas
- Washington County, Colorado
- Washington County, Florida
- Washington County, Georgia
- Washington County, Idaho
- Washington County, Illinois
- Washington County, Indiana
- Washington County, Iowa
- Washington County, Kansas
- Washington County, Kentucky
- Washington Parish, Louisiana
- Washington County, Maryland
- Washington County, Maine
- Washington County, Minnesota
- Washington County, Missouri
- Washington County, Mississippi
- Washington County, Nebraska
- Washington County, New York
- Washington County, North Carolina
- Washington County, Ohio
- Washington County, Oklahoma
- Washington County, Oregon
- Washington County, Pennsylvania
- Washington County, Rhode Island
- Washington County, Tennessee
- Washington County, Texas
- Washington County, Utah
- Washington County, Virginia
- Washington County, Vermont
- Washington County, Wisconsin
Extinct counties
- Washington County, former county of South Dakota (1883-1943) that joined with Jackson, Pennington and Shannon counties.
- Washington County, District of Columbia (historic subdivision abolished in 1871)
Other meanings
Washington County may also refer to
- Washington County (album), a 1970 album by Arlo Guthrie
