| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
|---|
| Sibert | city | Alabama | United States | 30.74444 | -88.06 | 9 | 93875 |
| Siberton | city | Alabama | United States | 33.98889 | -86.10833 | 551 | 16159 |
| Siddonsville | city | Alabama | United States | 32.41806 | -87.61333 | 249 | 517 |
| Sidhart historical | city | Alabama | United States | 34.005 | -85.45972 | 977 | 1290 |
| Sidney | city | Alabama | United States | 31.06778 | -88.23444 | 298 | 3166 |
| Sidney | city | Alabama | United States | 34.27889 | -86.36583 | 807 | 7483 |
| Sigma | city | Alabama | United States | 31.28194 | -85.19722 | 196 | 2458 |
| Signal Point Subdivision subdivision | city | Alabama | United States | 34.36861 | -86.25222 | 1003 | 7298 |
| Sigsbee | city | Alabama | United States | 34.34139 | -85.71 | 1197 | 3546 |
| Sikes | city | Alabama | United States | 32.88861 | -85.55861 | 800 | 1667 |
| Sikesville | city | Alabama | United States | 33.12639 | -85.67472 | 862 | 886 |
| Silas | city | Alabama | United States | 31.76528 | -88.32917 | 246 | 737 |
| Siloam | city | Alabama | United States | 32.42278 | -88.2675 | 351 | 1060 |
| Siluria | city | Alabama | United States | 33.22917 | -86.825 | 613 | 22896 |
| Silver Cross | city | Alabama | United States | 31.68083 | -88.17417 | 111 | 860 |
| Silver Landing | city | Alabama | United States | 31.23278 | -87.84778 | 36 | 613 |
| Silver Meadows | city | Alabama | United States | 31.20833 | -85.43611 | 272 | 27939 |
| Silver Run | city | Alabama | United States | 33.565 | -85.90806 | 643 | 8110 |
| Silverhill | city | Alabama | United States | 30.54528 | -87.75167 | 141 | 5870 |
| Simcoe | city | Alabama | United States | 34.22417 | -86.73444 | 898 | 5319 |
| Simmons Crossroads | city | Alabama | United States | 32.66722 | -85.7225 | 672 | 1940 |
| Simmsville | city | Alabama | United States | 33.32444 | -86.70889 | 666 | 10442 |
| Simpson | city | Alabama | United States | 33.07167 | -85.72194 | 767 | 810 |
| Simpson Subdivision subdivision | city | Alabama | United States | 33.23917 | -87.62667 | 164 | 10297 |
| Simpson subdivision | city | Alabama | United States | 34.58333 | -87.00028 | 597 | 39607 |
| Sims Chapel | city | Alabama | United States | 31.21944 | -88.14861 | 49 | 1095 |
| Simsville | city | Alabama | United States | 32.10444 | -85.87083 | 357 | 639 |
| Singing Brook subdivision | city | Alabama | United States | 31.30417 | -85.84528 | 354 | 18297 |
| Sipsey | city | Alabama | United States | 33.82472 | -87.08611 | 400 | 5754 |
| Six Mile | city | Alabama | United States | 34.42389 | -86.75639 | 652 | 3197 |
| Six Points subdivision | city | Alabama | United States | 34.8175 | -87.68056 | 564 | 41728 |
| Six Way | city | Alabama | United States | 34.52444 | -86.88278 | 603 | 8641 |
| Sixmile | city | Alabama | United States | 33.00778 | -87.00556 | 357 | 889 |
| Sizemore Landing | city | Alabama | United States | 30.86361 | -87.89556 | 72 | 2594 |
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