| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Sīlīgīrd | city | Iran | 35.13 | 50.27 | 5026 | 1381 | |
| Sīnehqān | city | Iran | 33.96 | 50.93 | 7365 | 3124 | |
| Sīneqān | city | Iran | 33.96 | 50.93 | 7365 | 3124 | |
| Sīnjgān | city | Iran | 34.51 | 50.33 | 5636 | 1185 | |
| Sīr Kand | city | Iran | 33.94 | 49.63 | 6870 | 2300 | |
| Sīrkan | city | Iran | 33.94 | 49.63 | 6870 | 2300 | |
| Sīrū | city | Iran | 34.42 | 50.89 | 4311 | 894 | |
| Sīyān Olyā | city | Iran | 33.84 | 50.05 | 6233 | 4121 | |
| Sīyāvashān | city | Iran | 34.44 | 50.00 | 6108 | 2893 | |
| Sīāh Kūh-e Pā’īn | city | Iran | 34.10 | 50.59 | 4530 | 2265 | |
| Sīāh Kūh-e Soflá | city | Iran | 34.10 | 50.59 | 4530 | 2265 | |
| Sīāh Vashān | city | Iran | 34.44 | 50.00 | 6108 | 2893 | |
| Sīān ‘Olyā | city | Iran | 33.84 | 50.05 | 6233 | 4121 | |
| Sīān-e Pā’īn | city | Iran | 33.83 | 50.06 | 6148 | 4023 | |
| Sīān-e Soflá | city | Iran | 33.83 | 50.06 | 6148 | 4023 | |
| Sīān-e ‘Olyā | city | Iran | 33.84 | 50.05 | 6233 | 4121 |