UpAlphabetical listing of Places in Mississippi
| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
| Sibley | city | Mississippi | United States | 31.38 | -91.40 | 98 | |
| Sibleyton | city | Mississippi | United States | 33.44 | -89.53 | 331 | |
| Sidon | city | Mississippi | United States | 33.41 | -90.20 | 118 | |
| Signal | city | Mississippi | United States | 32.40 | -90.85 | 298 | |
| Siloam | city | Mississippi | United States | 33.64 | -88.76 | 239 | |
| Silver City | city | Mississippi | United States | 33.10 | -90.50 | 98 | |
| Silver Creek | city | Mississippi | United States | 31.61 | -90.00 | 275 | |
| Silver Creek Acres | city | Mississippi | United States | 30.42 | -89.40 | 32 | |
| Silver Lake (historical) | city | Mississippi | United States | 33.20 | -91.06 | 108 | |
| Silver Run | city | Mississippi | United States | 30.73 | -89.35 | 170 | |
| Silver Springs | city | Mississippi | United States | 34.78 | -88.78 | 830 | |
| Simmons Mobile Home Park | city | Mississippi | United States | 30.39 | -88.62 | 9 | |
| Simmonsville | city | Mississippi | United States | 31.06 | -90.31 | 347 | |
| Simonds | city | Mississippi | United States | 31.01 | -90.18 | 216 | |
| Simpson | city | Mississippi | United States | 31.84 | -89.34 | 318 | |
| Simrall | city | Mississippi | United States | 32.20 | -90.95 | 219 | |
| Sinai | city | Mississippi | United States | 32.12 | -90.19 | 288 | |
| Singleton | city | Mississippi | United States | 32.89 | -89.54 | 830 | |
| Singleton (historical) | city | Mississippi | United States | 33.19 | -88.86 | 298 | |
| Singleton Settlement | city | Mississippi | United States | 32.38 | -89.41 | 400 | |
| Sipsey Fork | city | Mississippi | United States | 33.95 | -88.24 | 311 | |
| Sisloff Junction | city | Mississippi | United States | 33.77 | -90.23 | 124 | |
| Siwel | city | Mississippi | United States | 32.25 | -90.30 | 347 | |
| Six Towns (historical) | city | Mississippi | United States | 32.26 | -89.23 | 830 | |
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