| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Sibley | city | Louisiana | United States | 32.58 | -92.47 | 262 | |
| Sibley | city | Louisiana | United States | 32.54 | -93.30 | 196 | |
| Sicard | city | Louisiana | United States | 32.53 | -92.04 | 78 | |
| Sicily Island | city | Louisiana | United States | 31.85 | -91.66 | 49 | |
| Sideline Mobile Home Park | city | Louisiana | United States | 29.87 | -89.87 | 3 | |
| Siegen | city | Louisiana | United States | 30.37 | -91.07 | 22 | |
| Siegle | city | Louisiana | United States | 32.49 | -92.18 | 95 | |
| Sieper | city | Louisiana | United States | 31.21 | -92.81 | 173 | |
| Sieps | city | Louisiana | United States | 31.32 | -92.46 | 52 | |
| Sievers Trailer Court | city | Louisiana | United States | 29.86 | -90.11 | 3 | |
| Sikes | city | Louisiana | United States | 32.08 | -92.49 | 209 | |
| Silessi Mobile Home Park | city | Louisiana | United States | 30.47 | -90.47 | 22 | |
| Siloam Springs | city | Louisiana | United States | 32.16 | -92.67 | 246 | |
| Silver Pine Village | city | Louisiana | United States | 32.43 | -93.82 | 255 | |
| Silverside | city | Louisiana | United States | 30.40 | -91.11 | 22 | |
| Silverside Heights Garden | city | Louisiana | United States | 30.39 | -91.11 | 22 | |
| Silverwood | city | Louisiana | United States | 30.19 | -92.60 | 3 | |
| Simmesport | city | Louisiana | United States | 30.98 | -91.80 | 9 | |
| Simmons Settlement | city | Louisiana | United States | 30.68 | -92.89 | 72 | |
| Simms | city | Louisiana | United States | 31.46 | -92.42 | 196 | |
| Simpson | city | Louisiana | United States | 31.25 | -93.02 | 229 | |
| Simsboro | city | Louisiana | United States | 32.53 | -92.79 | 347 | |
| Singer | city | Louisiana | United States | 30.65 | -93.41 | 127 | |
| Siracusaville | city | Louisiana | United States | 29.69 | -91.15 | 3 |