Washington Court House is a city in Fayette County, Ohio, United States. It is the county seat of Fayette County and is located between Cincinnati and Columbus, Ohio. The population was 14,192 in 2010 at the 2010 census. Until 2002, the official name of the city was City of Washington, but there also existed a municipality in Guernsey County, Ohio with the name Washington (now known as Old Washington). The area was originally settled by Virginia war veterans who received the land from the government as payment for their service in the American Revolution. In 2002, a new charter was adopted, officially changing the name to the "City of Washington Court House." The name is often abbreviated as "Washington C.H."