| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Soldier | city | Iowa | United States | 41.99 | -95.78 | 1148 | |
| Sollberg | city | Iowa | United States | 42.74 | -93.64 | 1217 | |
| Solomon | city | Iowa | United States | 40.91 | -95.44 | 1102 | |
| Solon | city | Iowa | United States | 41.81 | -91.49 | 830 | |
| Somber | city | Iowa | United States | 43.42 | -93.40 | 1669 | |
| Somers | city | Iowa | United States | 42.38 | -94.43 | 1174 | |
| South Amana | city | Iowa | United States | 41.78 | -91.97 | 843 | |
| South Augusta | city | Iowa | United States | 40.75 | -91.28 | 830 | |
| South English | city | Iowa | United States | 41.45 | -92.09 | 830 | |
| South Garry Owen | city | Iowa | United States | 42.23 | -90.81 | 951 | |
| South Ridge Estates | city | Iowa | United States | 41.51 | -93.60 | 849 | |
| South River Crossing (historical) | city | Iowa | United States | 41.22 | -93.75 | 938 | |
| South Switch Junction | city | Iowa | United States | 42.47 | -90.65 | 830 | |
| South Towne Park | city | Iowa | United States | 41.59 | -91.01 | 830 | |
| Southern Acres Mobile Estates | city | Iowa | United States | 42.71 | -95.44 | 1669 | |
| Southview Estates Mobile Home Park | city | Iowa | United States | 42.43 | -92.29 | 898 |