Wauseon is a city in and the county seat of Fulton County, Ohio, United States. The population was 7,332 at the 2010 census. It was named after Wauseon, a Potawatomi Native American who lived in the area before the founding of the state. As of the census of 2000, there were 7,091 people, 2,706 households, and 1,875 families residing in the city. The population density was 1,437.6 people per square mile (555.3/km²). There were 2,851 housing units at an average density of 578.0 per square mile (223.3/km²). The racial makeup of the city was 92.77% White, 0.55% African American, 0.37% Native American, 0.82% Asian, 0.01% Pacific Islander, 4.02% from other races, and 1.47% from two or more races. Hispanic or Latino of any race were 9.79% of the population.