- Calmar
- Carlisle
- Carroll
- Cascade
- Casey
- Cedar Falls
- Cedar Rapids
- Center Point
- Centerville
- Central City
- Chariton
- Charles City
- Cherokee
- Chester
- Churdan
- Clarence
- Clarinda
- Clarksville
- Clear Lake
- Clinton
- Clive
- Coin
- Colfax
- Coon Rapids
- Corning
- Correctionville
- Corydon
- Council Bluffs
- Crawfordsville
- Cresco
- Creston
- Sac City
- Sanborn
- Schaller
- Scranton
- Shelby
- Sheldon
- Shellsburg
- Shenandoah
- Sherrill
- Sibley
- Sidney
- Sigourney
- Sioux Center
- Sioux City
- Sioux Rapids
- Solon
- Spencer
- Spillville
- Spirit Lake
- Springville
- St Ansgar
- Stacyville
- State Center
- Storm Lake
- Story City
- Strawberry Point
- Strawberry Pt
- Stuart
- Sumner
- Sutherland
- Swea City
- Swedesburg