| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Taft | city | Montana | United States | 47.42 | -115.60 | 4435 | |
| Talc | city | Montana | United States | 47.72 | -115.44 | 2509 | |
| Tampico | city | Montana | United States | 48.30 | -106.83 | 2509 | |
| Tarkio | city | Montana | United States | 47.02 | -114.74 | 3349 | |
| Tate Place | city | Montana | United States | 45.05 | -112.02 | 6709 | |
| Tattnall | city | Montana | United States | 48.63 | -107.54 | 2509 | |
| Tee Pee Trailer Court | city | Montana | United States | 45.68 | -111.07 | 5029 | |
| Teigen | city | Montana | United States | 47.04 | -108.60 | 3349 | |
| Terry | city | Montana | United States | 46.79 | -105.31 | 2509 | |
| Thiels West Trailer Court | city | Montana | United States | 48.55 | -109.75 | 2598 | |
| Thoeny | city | Montana | United States | 48.88 | -106.92 | 2509 | |
| Thomasville (historical) | city | Montana | United States | 45.83 | -111.04 | 5029 | |
| Thompson Falls | city | Montana | United States | 47.60 | -115.34 | 2509 | |
| Three Forks | city | Montana | United States | 47.28 | -111.09 | 4189 | |
| Three Forks | city | Montana | United States | 48.11 | -113.31 | 5029 | |
| Three Forks | city | Montana | United States | 45.89 | -111.55 | 4189 | |
| Three Forks Junction | city | Montana | United States | 45.90 | -111.60 | 4189 | |
| Thurlow | city | Montana | United States | 46.29 | -106.31 | 2509 | |
| Tiber | city | Montana | United States | 48.51 | -111.08 | 3349 | |
| Tiber Dam Camp | city | Montana | United States | 48.31 | -111.09 | 3349 | |
| Tindall (historical) | city | Montana | United States | 47.16 | -107.62 | 3349 | |
| Tippet Place | city | Montana | United States | 45.93 | -112.18 | 5029 | |
| Tipville (historical) | city | Montana | United States | 48.85 | -112.32 | 4189 | |
| Tobacco | city | Montana | United States | 48.83 | -114.98 | 2798 | |
| Tobacco (historical) | city | Montana | United States | 48.92 | -115.06 | 2657 | |
| Tobin | city | Montana | United States | 46.64 | -112.10 | 4189 | |
| Toluca | city | Montana | United States | 45.75 | -107.87 | 3349 | |
| Toole | city | Montana | United States | 47.33 | -115.02 | 3349 | |
| Top O'Deep | city | Montana | United States | 46.82 | -113.26 | 6709 | |
| Torens Trailer Park | city | Montana | United States | 48.17 | -111.95 | 3540 | |
| Toston | city | Montana | United States | 46.17 | -111.44 | 4189 | |
| Town and Country Trailer Park | city | Montana | United States | 45.44 | -105.41 | 3349 | |
| Townsend | city | Montana | United States | 46.32 | -111.52 | 4189 | |
| Tracy | city | Montana | United States | 47.41 | -111.15 | 3599 | |
| Trailcreek | city | Montana | United States | 48.92 | -114.41 | 4189 | |
| Trails End Trailer Court | city | Montana | United States | 48.78 | -104.58 | 2040 | |
| Trask | city | Montana | United States | 46.10 | -112.42 | 6289 | |
| Travellers Rest Trailer Court | city | Montana | United States | 46.75 | -114.08 | 3349 | |
| Travois Village | city | Montana | United States | 46.89 | -114.02 | 3349 | |
| Trego | city | Montana | United States | 48.71 | -114.87 | 3349 | |
| Trident | city | Montana | United States | 45.95 | -111.48 | 4189 | |
| Trine (historical) | city | Montana | United States | 47.79 | -108.35 | 3349 | |
| Trinity (historical) | city | Montana | United States | 46.77 | -112.22 | 4488 | |
| Trout Creek | city | Montana | United States | 47.84 | -115.60 | 2509 | |
| Troy | city | Montana | United States | 48.46 | -115.89 | 1998 | |
| Truchot Hill | city | Montana | United States | 47.84 | -112.19 | 4189 | |
| Truly | city | Montana | United States | 47.36 | -111.44 | 3398 | |
| Tucker | city | Montana | United States | 46.37 | -114.14 | 3402 | |
| Tungsten | city | Montana | United States | 46.28 | -113.06 | 8389 | |
| Tunis | city | Montana | United States | 47.81 | -110.84 | 2916 | |
| Turah | city | Montana | United States | 46.84 | -113.83 | 3366 | |
| Turner | city | Montana | United States | 48.84 | -108.41 | 3349 | |
| Turner Colony | city | Montana | United States | 48.76 | -108.43 | 3349 | |
| Turtle Lake | city | Montana | United States | 47.67 | -114.07 | 3349 | |
| Tuscor | city | Montana | United States | 47.90 | -115.69 | 2509 | |
| Tusler | city | Montana | United States | 46.48 | -105.75 | 2509 | |
| Twin Acres Mobile Home Park | city | Montana | United States | 48.17 | -114.29 | 3349 | |
| Twin Bridges | city | Montana | United States | 45.54 | -112.33 | 5029 | |
| Twin Creeks | city | Montana | United States | 46.91 | -113.71 | 3382 | |
| Two Dot | city | Montana | United States | 46.42 | -110.07 | 4494 | |
| Two River Trailer Park | city | Montana | United States | 46.75 | -114.09 | 3349 | |
| Twodot | city | Montana | United States | 46.42 | -110.07 | 4494 | |
| Tyman Place | city | Montana | United States | 46.22 | -110.64 | 6000 | |
| Tšêškemâhoévehoéno | city | Montana | United States | 46.27 | -106.68 | 2693 |