- Cable
- Cadott
- Cambria
- Cameron
- Camp Douglas
- Camp Lake
- Campbellsport
- Caroline
- Cascade
- Cascade Mountain
- Casco
- Cashton
- Cassville
- Castle Rock
- Cataract
- Catawba
- Cato
- Cazenovia
- Cecil
- Cedar Grove
- Cedarburg
- Centuria
- Chaseburg
- Chelsea
- Chenequa
- Chetek
- Chief Lake
- Chili
- Chilton
- Chippewa Falls
- Christie Mountain
- Christmas Mountain
- Clam Falls
- Clam Lake
- Clayton
- Clear Lake
- Clintonville
- Clyman
- Cobb
- Cochrane
- Colby
- Coleman
- Colfax
- Collins
- Coloma
- Combined Locks
- Commonwealth
- Como
- Concord
- Conrath
- Coon Valley
- Cooperstown
- Cornell
- Cornucopia
- Cottage Grove
- Couderay
- Crandon
- Crivitz
- Cross Plains
- Cuba City
- Cudahy
- Curtiss
