Wauseon is a city in and the county seat of Fulton County, Ohio, United States. The population was 7,091 at the 2000 census. It was named after Wauseon, a Potawatomi Native American who lived in the area before the founding of the state.
Wauseon is the county seat of Fulton County, Ohio. It is located at 41°33′8″N 84°8′21″W / 41.55222°N 84.13917°W / 41.55222; -84.13917 (41.552230, -84.139126).