thumb| Washington County er navnet på 30 amter (counties) i USA. De er alle opkaldt efter USA's første præsident, George Washington. Det er det mest udbredte amts-navn i USA.
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 County, Maine Washington County, Maryland Washington County, Minnesota Washington County, Mississippi
Washington County, Missouri 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, Vermont Washington County, Virginia Washington County, Wisconsin
Parish Washington Parish