| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Sīnglī-ye Shīrīn | city | Khorasan-e Shomali | Iran | 37.21 | 58.13 | 4189 | 2384 |
| Sīnkelī-ye Shīrīn | city | Khorasan-e Shomali | Iran | 37.21 | 58.13 | 4189 | 2384 |
| Sīnān | city | Khorasan-e Shomali | Iran | 37.07 | 57.43 | 4189 | 15350 |
| Sīr Separānlū-ye Pā’īn | city | Khorasan-e Shomali | Iran | 37.69 | 58.02 | 5393 | 2421 |
| Sīr Sīrānlū-ye Pā’īn | city | Khorasan-e Shomali | Iran | 37.69 | 58.02 | 5393 | 2421 |
| Sīrseprānlū-ye ‘Olyā | city | Khorasan-e Shomali | Iran | 37.70 | 58.01 | 5869 | 2386 |
| Sīs Pārānlū-ye Pā’īn | city | Khorasan-e Shomali | Iran | 37.69 | 58.02 | 5393 | 2421 |
| Sīspārānlū-ye Soflá | city | Khorasan-e Shomali | Iran | 37.69 | 58.02 | 5393 | 2421 |