It includes the cities of Brillion, Chilton, and New Holstein, and the parts of Appleton and Menasha which fall within Calumet County.

It also contains the villages of Hilbert, Potter, Sherwood, Stockbridge, St. Nazianz, Valders, and Whitelaw.

[7] The boundaries of the 3rd district have changed significantly over the various redistricting laws passed since 1972.

[10] The 2002 court-ordered redistricting plan removed towns of Fond du Lac and southern Calumet, and added back areas of southeastern Outagamie County.

The 2022 court-ordered redistricting shifted the district further west, adding part of Manitowoc County and shedding towns along the east shore of Lake Winnebago.