Neenah (/ˈninə/) is a city in Winnebago County, Wisconsin, in the north central United States. It is situated on the banks of Lake Winnebago, Little Lake Butte des Morts, and the Fox River, approximately forty miles (60 km) southwest of Green Bay. Neenah's population was 25,501 at the 2010 census.

Neenah is bordered by the Town of Neenah. The city is the southwesternmost of the Fox Cities of northeast Wisconsin. It is the smaller of the two principal cities of the Oshkosh-Neenah Metropolitan Statistical Area, which is included in the Appleton-Oshkosh-Neenah Combined Statistical Area. It is sometimes referred to as a twin city with Menasha, with which it shares Doty Island.