Wauseon ( WAW-see-on) is a city in and the county chair of Fulton County, Ohio, approximately 31 mi (51 km) west of Toledo. The population was 7,332 at the become old of the 2010 census.

Wauseon was platted 1853 considering the Michigan Southern Air Railway was outstretched to that point. Land speculators bought 160 acres of land, which would become the City of Wauseon. The original name for the city was “Litchfield” after Litchfield, New York, where many of the city’s extra settlers had emigrated from. However, Hortensia Hayes, the daughter of an in the future settler, suggested that the extra village be named after an Ottawa Tribe Chief named Wauseon, who was provoked by the federal government to forfeit their land, before disturbing to Oklahoma in 1839. The village was incorporated in 1859. With the commercial attainment that the railroad brought, Wauseon would grow larger than the original seat of Fulton County (Ottokee), and in 1869 Wauseon was named the county seat. The Fulton County Courthouse was built in 1871.

Between 1901 and 1939, the community was served by the Toledo and Indiana Railway, an interurban amongst Toledo and Bryan, Ohio. The construction of the Ohio Turnpike in the mid 20th century after that helped pro to the commercial increase of Wauseon.

Wauseon 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).