| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
|---|
| Sibirak | city | Irkutskaya Oblast' | Russia | 54.7247222 | 100.5127778 | 1833 | 187 |
| Sibiryak | city | Irkutskaya Oblast' | Russia | 54.7247222 | 100.5127778 | 1833 | 187 |
| Sidorova | city | Irkutskaya Oblast' | Russia | 54.2833333 | 103.0833333 | 1315 | 49 |
| Sidorova | city | Irkutskaya Oblast' | Russia | 57.75 | 108.1333333 | 1099 | 56 |
| Sidorovo | city | Irkutskaya Oblast' | Russia | 54.2833333 | 103.0833333 | 1315 | 49 |
| Sil'gisha | city | Irkutskaya Oblast' | Russia | 61.3833333 | 108.0166667 | 984 | 5 |
| Silyisha | city | Irkutskaya Oblast' | Russia | 61.3833333 | 108.0166667 | 984 | 5 |
| Simakhina | city | Irkutskaya Oblast' | Russia | 57.6666667 | 102.6 | 925 | 60 |
| Simakhino | city | Irkutskaya Oblast' | Russia | 57.6666667 | 102.6 | 925 | 60 |
| Simenga | city | Irkutskaya Oblast' | Russia | 62.6166667 | 108.3833333 | 787 | 5 |
| Sina | city | Irkutskaya Oblast' | Russia | 57.7833333 | 114.6 | 2355 | 14 |
| Siniy Khrebtin | city | Irkutskaya Oblast' | Russia | 60.3666667 | 107.6 | 1085 | 5 |
| Sinya | city | Irkutskaya Oblast' | Russia | 57.7833333 | 114.6 | 2355 | 14 |
| Sinyuga | city | Irkutskaya Oblast' | Russia | 57.75 | 115.2166667 | 935 | 14 |
| Sinyushkina | city | Irkutskaya Oblast' | Russia | 56.5166667 | 106.25 | 1364 | 47 |
| Sinyushkino | city | Irkutskaya Oblast' | Russia | 56.5166667 | 106.25 | 1364 | 47 |
| Sisina | city | Irkutskaya Oblast' | Russia | 58.5 | 116.2166667 | 2847 | 14 |
| Siskovo | city | Irkutskaya Oblast' | Russia | 57.4166667 | 116.4666667 | 1141 | 14 |
| Sizova | city | Irkutskaya Oblast' | Russia | 57.8333333 | 102.7 | 820 | 14 |
| Sizovo | city | Irkutskaya Oblast' | Russia | 57.8333333 | 102.7 | 820 | 14 |
| Sizovskaya | city | Irkutskaya Oblast' | Russia | 57.8333333 | 102.7 | 820 | 14 |
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