| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
| Sidi Hamzah | city | Mintaqat al Madinah | Saudi Arabia | 24.5 | 39.6166667 | 1955 | 1335 |
| Sidi` | city | | Saudi Arabia | 30.6522222 | 38.0669444 | 1738 | 336 |
| Sidis | city | | Saudi Arabia | 27.4616667 | 41.6672222 | 3244 | 714 |
| Sidus | city | Mintaqat ar Riyad | Saudi Arabia | 24.9916667 | 46.2075 | 2703 | 1461 |
| Sidīs | city | | Saudi Arabia | 27.4616667 | 41.6672222 | 3244 | 714 |
| Sidūs | city | Mintaqat ar Riyad | Saudi Arabia | 24.9916667 | 46.2075 | 2703 | 1461 |
| Sifeina | city | | Saudi Arabia | 23.15 | 40.5333333 | 3070 | 1291 |
| Sifsafa | city | | Saudi Arabia | 19.5666667 | 40.9 | 49 | 2816 |
| Sihat | city | Al Mintaqah ash Sharqiyah | Saudi Arabia | 26.4794444 | 50.045 | 19 | 173 |
| Sihmah | city | Al Mintaqah ash Sharqiyah | Saudi Arabia | 26.3930556 | 47.8269444 | 1092 | 294 |
| Silaimi | city | | Saudi Arabia | 26.2833333 | 41.35 | 3612 | 719 |
| Simira' | city | | Saudi Arabia | 26.4925 | 42.1280556 | 3139 | 719 |
| Simla | city | | Saudi Arabia | 25.4333333 | 44.4166667 | 2273 | 1456 |
| Simīrāʼ | city | | Saudi Arabia | 26.4925 | 42.1280556 | 3139 | 719 |
| Sinnariyah | city | | Saudi Arabia | 24.6744444 | 43.5463889 | 3366 | 1470 |
| Sirar | city | | Saudi Arabia | 20.3 | 40.8333333 | 1473 | 3738 |
| Sirr | city | | Saudi Arabia | 18.9133333 | 41.97 | 1433 | 3570 |
| Sirr | city | Mintaqat Jizan | Saudi Arabia | 16.7316667 | 42.9044444 | 200 | 11096 |
| Sirr Al Ghaliz | city | | Saudi Arabia | 18.2333333 | 42.6 | 6893 | 3584 |
| Sirr ad Ghalidh | city | | Saudi Arabia | 18.2333333 | 42.6 | 6893 | 3584 |
| Sirr Āl Ghalīz̧ | city | | Saudi Arabia | 18.2333333 | 42.6 | 6893 | 3584 |
| Sirum | city | | Saudi Arabia | 18.75 | 41.2 | 0 | 922 |
| Sirūm | city | | Saudi Arabia | 18.75 | 41.2 | 0 | 922 |
| Sitar | city | | Saudi Arabia | 22.5833333 | 46.25 | 3159 | 1489 |
| Sitara | city | | Saudi Arabia | 22.5833333 | 46.25 | 3159 | 1489 |
| Sitarah | city | | Saudi Arabia | 22.5833333 | 46.25 | 3159 | 1489 |
| Sitār | city | | Saudi Arabia | 22.5833333 | 46.25 | 3159 | 1489 |
| Sitārah | city | | Saudi Arabia | 22.5833333 | 46.25 | 3159 | 1489 |
| Siḩmah | city | Al Mintaqah ash Sharqiyah | Saudi Arabia | 26.3930556 | 47.8269444 | 1092 | 294 |
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