The seat and largest city is Fond du Lac.
It borders Winnebago, Calumet, Sheboygan, Washington, Dodge and Green Lake Counties.
Main highways include I-41/US-41, US-45, US-151, WI-23, WI-26, WI-44 and WI-49.
Cities
Campbellsport
Eden
Fond du Lac
Ripon