| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Sīs | city | Azarbayjan-e Sharqi | Iran | 38.20 | 45.81 | 5029 | 1788 |
| Sīs Pārānlū-ye Pā’īn | city | Khorasan-e Shomali | Iran | 37.69 | 58.02 | 5393 | 2421 |
| Sīsakht | city | Kohgiluyeh va Bowyer Ahmad | Iran | 30.86 | 51.46 | 7549 | 5330 |
| Sīsangān | city | Gilan | Iran | 37.19 | 49.04 | 5347 | 10877 |
| Sīsarā Pā’īn | city | Mazandaran | Iran | 36.72 | 51.23 | -1689 | 13046 |
| Sīseh Garag-e Pā’īn | city | Kohgiluyeh va Bowyer Ahmad | Iran | 30.58 | 51.40 | 7841 | 1595 |
| Sīser | city | Azarbayjan-e Gharbi | Iran | 36.25 | 45.62 | 4468 | 5004 |
| Sīsgān | city | Khorasan-e Jonubi | Iran | 33.06 | 59.44 | 7004 | 596 |
| Sīsheh Rīz | city | Sistan va Baluchestan | Iran | 28.91 | 61.42 | 3415 | 298 |
| Sīshk | city | Khorasan-e Razavi | Iran | 33.61 | 57.28 | 6227 | 303 |
| Sīsnīān | city | Fars | Iran | 30.03 | 52.41 | 5377 | 2980 |
| Sīspārānlū-ye Soflá | city | Khorasan-e Shomali | Iran | 37.69 | 58.02 | 5393 | 2421 |
| Sīstak | city | Sistan va Baluchestan | Iran | 25.88 | 59.38 | 347 | 745 |
| Sīstān | city | Gilan | Iran | 36.96 | 49.76 | 2509 | 7691 |
| Sīstān | city | Fars | Iran | 28.52 | 53.28 | 3582 | 4768 |
| Sīstān | city | Gilan | Iran | 36.96 | 49.85 | 2509 | 11771 |
| Sīstān Maḩalleh | city | Golestan | Iran | 36.91 | 54.37 | 42 | 22313 |
| Sīstān-e ‘Olyā | city | Fars | Iran | 28.52 | 53.28 | 3582 | 4768 |
| Sīstāneh | city | Hamadan | Iran | 34.66 | 48.32 | 6066 | 5364 |
| Sīstānī | city | Yazd | Iran | 31.81 | 55.69 | 6709 | 298 |
| Sīsān | city | Azarbayjan-e Sharqi | Iran | 37.84 | 46.77 | 5869 | 2086 |
| Sīsān-e Chā’ī | city | Azarbayjan-e Sharqi | Iran | 37.84 | 46.77 | 5869 | 2086 |
| Sīsān-e Qadīm | city | Azarbayjan-e Sharqi | Iran | 37.83 | 46.74 | 6709 | 2086 |
| Sīsān-e Qadīmī | city | Azarbayjan-e Sharqi | Iran | 37.84 | 46.77 | 5869 | 2086 |