| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Sīnak Chāl | city | Semnan | Iran | 35.49 | 52.79 | 9425 | 2086 |
| Sīneh Benā | city | Semnan | Iran | 36.42 | 55.48 | 4189 | 298 |
| Sīnehband | city | Semnan | Iran | 36.42 | 55.48 | 4189 | 298 |
| Sīraft | city | Semnan | Iran | 35.88 | 53.50 | 6811 | 3859 |
| Sīroft | city | Semnan | Iran | 35.88 | 53.50 | 6811 | 3859 |
| Sīyāh Marz Kūh | city | Semnan | Iran | 36.65 | 54.75 | 6761 | 8428 |
| Sīyān | city | Semnan | Iran | 36.27 | 54.10 | 5029 | 298 |
| Sīāh Kamar | city | Semnan | Iran | 36.65 | 54.92 | 7549 | 298 |
| Sīāh Kūh | city | Semnan | Iran | 35.98 | 53.29 | 8746 | 8170 |
| Sīāh Marz Kūh | city | Semnan | Iran | 36.65 | 54.75 | 6761 | 8428 |
| Sīāh Rūd Bār | city | Semnan | Iran | 36.00 | 53.44 | 8389 | 8195 |
| Sīāh Rūdbād | city | Semnan | Iran | 36.00 | 53.44 | 8389 | 8195 |
| Sīāh Rūdbār | city | Semnan | Iran | 36.00 | 53.44 | 8389 | 8195 |
| Sīāh Rūdbār-e Pā’īn | city | Semnan | Iran | 35.98 | 53.43 | 8389 | 8195 |
| Sīāh Rūdbār-e Vasaţ | city | Semnan | Iran | 35.99 | 53.44 | 9228 | 8195 |