Winnebago County is a county in the U.S. state of Wisconsin. As of the 2010 census, the population was 166,994. Its county seat is Oshkosh.Winnebago County comprises the Oshkosh-Neenah, WI Metropolitan Statistical Area, which is included in the Appleton-Oshkosh-Neenah, WI Combined Statistical Area.HistoryWinnebago County was created in 1840 and organized in 1848. The name Winnebago is of Algonquin origin and means 'people dwelling by the fetid or ill-smelling water', which may refer to a sulfur spring. The county seat, Oshkosh, was incorporated as a city in 1853, when it already had a population of nearly 2,800.GeographyAccording to the U.S. Census Bureau, the county has a total area of, of which is land and (25%) is water.Adjacent countiesWaupaca County - northwestOutagamie County - northeastCalumet County - eastFond du Lac County - southGreen Lake County - southwestWaushara County - west
