Towns
| State | City/Town | Town Title |
|---|---|---|
| Iowa | Seymour | Seymour, IA |
| Iowa | Shambaugh | Shambaugh, IA |
| Iowa | Shannon City | Shannon City, IA |
| Iowa | Sharpsburg | Sharpsburg, IA |
| Iowa | Sheffield | Sheffield, IA |
| Iowa | Shelby | Shelby, IA |
| Iowa | Sheldahl | Sheldahl, IA |
| Iowa | Sheldon | Sheldon, IA |
| Iowa | Shell Rock | Shell Rock, IA |
| Iowa | Shellsburg | Shellsburg, IA |
| Iowa | Shenandoah | Shenandoah, IA |
| Iowa | Sherrill | Sherrill, IA |
| Iowa | Shueyville | Shueyville, IA |
| Iowa | Sibley | Sibley, IA |
| Iowa | Sidney | Sidney, IA |
| Iowa | Sigourney | Sigourney, IA |
| Iowa | Silver City | Silver City, IA |
| Iowa | Sioux Center | Sioux Center, IA |
| Iowa | Sioux City | Sioux City, IA |
| Iowa | Sioux Rapids | Sioux Rapids, IA |
| Iowa | Slater | Slater, IA |
| Iowa | Sloan | Sloan, IA |
| Iowa | Smithland | Smithland, IA |
| Iowa | Soldier | Soldier, IA |
| Iowa | Solon | Solon, IA |