52.2% were of German and 6.3% Irish ancestry according to Census 2000.
There were 24,082 households out of which 27.3% had children under the age of 18 living with them, 44.3% were married couples living together, 9.1% had a female householder with no husband present, and 43.3% were non-families. Route 45 travels north to New London, Wisconsin and travels south to Fond du Lac along Lake Winnebago.
The population density was 2,662.2 people per square mile (1,028.0/km²).
There were 25,420 housing units at an average density of 1,075.6 per square mile (415.3/km²).
Oshkosh is a city in Winnebago County, Wisconsin, United States, located where the Fox River enters Lake Winnebago from the west. The city is located adjacent to and partially within the Town of Oshkosh.