Washington County is a county located in the U.S. state of Florida. Its county seat is Chipley. Washington County is a prohibition or entirely dry county. Washington County was created in 1825 and was named after George Washington. The County's history has seen Native American, Spanish and English cultural influences. Washington County has a total area of approximately 616 square miles of which 94% is land and 6% water. As of the 2000 census, there were 20,973 people, 7,931 households, and 5,646 families residing in Washington County, FL.