| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
|---|
| Yaak | city | Montana | United States | 48.83306 | -115.70778 | 3221 | 126 |
| Yakt | city | Montana | United States | 48.54556 | -115.96778 | 1998 | 126 |
| Yakt historical | city | Montana | United States | 48.02694 | -115.00556 | 3330 | 150 |
| Yankee Flat historical | city | Montana | United States | 45.15889 | -112.99444 | 6200 | 45 |
| Yarnell | city | Montana | United States | 48.47083 | -115.29139 | 2506 | 225 |
| Yates | city | Montana | United States | 46.95111 | -104.13 | 2814 | 47 |
| Yegen | city | Montana | United States | 45.72361 | -108.62194 | 3198 | 23830 |
| Ynot historical | city | Montana | United States | 48.83667 | -107.67556 | 2398 | 14 |
| Yogo Crossing | city | Montana | United States | 46.85556 | -110.31583 | 5200 | 33 |
| York | city | Montana | United States | 46.72167 | -111.75111 | 4104 | 283 |
| Yreka | city | Montana | United States | 46.86139 | -113.33 | 4753 | 64 |
| Yukon Saddle | city | Montana | United States | 46.70972 | -113.81306 | 4799 | 481 |
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