| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Ирса | city | Leningradskaya Oblast' | Russia | 59.45 | 31.90 | 26 | 763 |
| Ирсенг | city | Alsace | France | 47.59 | 7.25 | 1233 | 13715 |
| Ирсеть | city | Mordoviya | Russia | 54.51 | 44.56 | 830 | 937 |
| Ирсон | city | Picardie | France | 49.92 | 4.08 | 830 | 11239 |
| Ирсу | city | Zhambyl | Kazakhstan | 43.44 | 74.94 | 3349 | 1192 |