| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
|---|
| Iksa | city | Respublika Mariy-El | Russia | 56.4908333 | 46.2838889 | 252 | 786 |
| Iksa-Kurtnya Vtoraya | city | Respublika Mariy-El | Russia | 56.4908333 | 46.2838889 | 252 | 786 |
| Iksha | city | Respublika Mariy-El | Russia | 56.6075 | 46.0677778 | 291 | 607 |
| Il'i-Vorozhtsovo | city | Respublika Mariy-El | Russia | 56.6666667 | 49.65 | 577 | 2045 |
| Il'inskoye | city | Respublika Mariy-El | Russia | 56.2213889 | 48.7925 | 308 | 1522 |
| Il'panur | city | Respublika Mariy-El | Russia | 56.7894444 | 49.3994444 | 501 | 2412 |
| Ilet' | city | Respublika Mariy-El | Russia | 56.1525 | 48.3258333 | 242 | 1583 |
| Ilet' | city | Respublika Mariy-El | Russia | 56.1138889 | 48.3522222 | 255 | 1862 |
| Ilet' | city | Respublika Mariy-El | Russia | 56.5705556 | 49.5019444 | 524 | 2080 |
| Iletnur | city | Respublika Mariy-El | Russia | 56.5686111 | 49.4027778 | 400 | 1655 |
| Imeni Lenina | city | Respublika Mariy-El | Russia | 56.5630556 | 45.9455556 | 252 | 607 |
| Ioshkar Ola | city | Respublika Mariy-El | Russia | 56.6369444 | 47.8711111 | 341 | 102838 |
| Irkina | city | Respublika Mariy-El | Russia | 56.05 | 48 | 203 | 1489 |
| Irkino | city | Respublika Mariy-El | Russia | 56.05 | 48 | 203 | 1489 |
| Irmuchash | city | Respublika Mariy-El | Russia | 56.7333333 | 49.3333333 | 442 | 2211 |
| Irnur | city | Respublika Mariy-El | Russia | 56.6902778 | 49.2975 | 433 | 2272 |
| Ishimovo | city | Respublika Mariy-El | Russia | 56.8333333 | 49.5 | 518 | 2310 |
| Ishtra | city | Respublika Mariy-El | Russia | 56.8944444 | 49.4797222 | 492 | 2328 |
| Ishtymbal | city | Respublika Mariy-El | Russia | 56.7886111 | 48.8233333 | 656 | 1870 |
| Ishtyra | city | Respublika Mariy-El | Russia | 56.8944444 | 49.4797222 | 492 | 2328 |
| Ishutur | city | Respublika Mariy-El | Russia | 56.6061111 | 48.7275 | 580 | 1602 |
| Ismentsy | city | Respublika Mariy-El | Russia | 55.9827778 | 48.2208333 | 275 | 1762 |
| Ivanbelyak | city | Respublika Mariy-El | Russia | 56.2213889 | 47.5216667 | 479 | 1485 |
| Ivanovskiy | city | Respublika Mariy-El | Russia | 56.6166667 | 49.6833333 | 538 | 2019 |
| Ivskaya Vershina | city | Respublika Mariy-El | Russia | 56.6691667 | 49.9769444 | 423 | 1695 |
| Izi Kugunur | city | Respublika Mariy-El | Russia | 56.6094444 | 48.7519444 | 639 | 1509 |
| Izi Shurga | city | Respublika Mariy-El | Russia | 56.4658333 | 48.7111111 | 626 | 1387 |
| Izishirga | city | Respublika Mariy-El | Russia | 56.4658333 | 48.7111111 | 626 | 1387 |
| Izykugunur | city | Respublika Mariy-El | Russia | 56.6094444 | 48.7519444 | 639 | 1509 |
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