Fond du Lac is a town in Fond du Lac County, Wisconsin, United States, first settled in 1836.

The population was 3,687 at the 2020 census.

[4] The name is French for "bottom of the lake", from its location at the south end of Lake Winnebago.

According to the United States Census Bureau, the town has a total area of 20.9 square miles (54.2 km2), of which, 19.9 square miles (51.4 km2) of it is land and 1.1 square miles (2.8 km2) of it (5.16%) is water.

The town is near the Horicon Marsh State Wildlife Area and the Horicon National Wildlife Refuge.