| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Pablo | city | Montana | United States | 47.60 | -114.12 | 3349 | |
| Pacific Junction | city | Montana | United States | 48.56 | -109.76 | 2582 | |
| Pack and Lacey Crossing | city | Montana | United States | 47.54 | -110.90 | 3382 | |
| Packers | city | Montana | United States | 47.50 | -112.89 | 5400 | |
| Packers Roost | city | Montana | United States | 48.75 | -113.78 | 4435 | |
| Palace Addition | city | Montana | United States | 45.66 | -110.56 | 4501 | |
| Pappas Place | city | Montana | United States | 45.97 | -112.36 | 6709 | |
| Paradise | city | Montana | United States | 47.39 | -114.80 | 2598 | |
| Paragon | city | Montana | United States | 46.37 | -106.00 | 2509 | |
| Paris (historical) | city | Montana | United States | 47.29 | -106.16 | 2532 | |
| Park Addition | city | Montana | United States | 45.66 | -110.56 | 4501 | |
| Park City | city | Montana | United States | 45.63 | -108.92 | 3392 | |
| Park City | city | Montana | United States | 46.54 | -112.11 | 5104 | |
| Park Dale (historical) | city | Montana | United States | 48.04 | -106.44 | 2037 | |
| Park Grove | city | Montana | United States | 48.03 | -106.45 | 2037 | |
| Park Road Trailer Court | city | Montana | United States | 45.65 | -110.57 | 4530 | |
| Parkdale (historical) | city | Montana | United States | 48.22 | -114.31 | 3349 | |
| Parker | city | Montana | United States | 46.18 | -111.61 | 4199 | |
| Parker School | city | Montana | United States | 48.25 | -109.74 | 4189 | |
| Pats Trailer Park | city | Montana | United States | 48.56 | -109.65 | 2509 | |
| Patterson | city | Montana | United States | 45.63 | -111.05 | 5111 | |
| Patterson (historical) | city | Montana | United States | 47.65 | -110.57 | 3349 | |
| Patterson Corner | city | Montana | United States | 45.79 | -112.89 | 5869 | |
| Paul Place | city | Montana | United States | 45.98 | -112.26 | 5912 | |
| Paxton (historical) | city | Montana | United States | 47.63 | -105.34 | 2509 | |
| Peaceful Haven Mobile Home Park | city | Montana | United States | 47.69 | -114.08 | 3349 | |
| Peaks and Pines Park | city | Montana | United States | 45.97 | -114.14 | 4189 | |
| Pearmond (historical) | city | Montana | United States | 48.01 | -105.86 | 1998 | |
| Peerless | city | Montana | United States | 48.78 | -105.83 | 2851 | |
| Pendroy | city | Montana | United States | 48.07 | -112.30 | 4199 | |
| Penwells (historical) | city | Montana | United States | 45.84 | -110.99 | 5206 | |
| Perma | city | Montana | United States | 47.36 | -114.58 | 2719 | |
| Pershing (historical) | city | Montana | United States | 45.76 | -104.55 | 3349 | |
| Peterson Place | city | Montana | United States | 45.37 | -109.46 | 5029 | |
| Philbrook (historical) | city | Montana | United States | 46.99 | -109.97 | 4258 | |
| Philipsburg | city | Montana | United States | 46.33 | -113.29 | 5869 | |
| Phillips | city | Montana | United States | 48.09 | -108.16 | 2585 | |
| Phon (historical) | city | Montana | United States | 47.52 | -106.57 | 2509 | |
| Piche | city | Montana | United States | 47.61 | -104.23 | 1955 | |
| Piedmont | city | Montana | United States | 45.84 | -112.13 | 4366 | |
| Piegan | city | Montana | United States | 48.43 | -112.69 | 4189 | |
| Pierce Crossing | city | Montana | United States | 48.35 | -112.49 | 4189 | |
| Piltzville | city | Montana | United States | 46.86 | -113.86 | 3349 | |
| Pine Creek | city | Montana | United States | 45.51 | -110.56 | 5029 | |
| Pine Grove | city | Montana | United States | 48.00 | -108.68 | 3727 | |
| Pine Grove Trailer Court | city | Montana | United States | 45.68 | -111.04 | 5029 | |
| Pine Park | city | Montana | United States | 48.37 | -114.18 | 3349 | |
| Pine Prairie | city | Montana | United States | 48.03 | -114.71 | 4189 | |
| Pinegrove | city | Montana | United States | 46.88 | -113.90 | 3349 | |
| Pinegrove Trailer Park | city | Montana | United States | 46.88 | -113.90 | 3349 | |
| Pinesdale | city | Montana | United States | 46.33 | -114.22 | 4189 | |
| Pinnacle | city | Montana | United States | 48.36 | -113.65 | 3618 | |
| Pioneer | city | Montana | United States | 46.51 | -112.97 | 5029 | |
| Pioneer | city | Montana | United States | 46.00 | -112.53 | 5869 | |
| Pioneer Junction | city | Montana | United States | 48.34 | -115.52 | 2509 | |
| Piper | city | Montana | United States | 46.99 | -109.20 | 4524 | |
| Pipestone | city | Montana | United States | 45.90 | -112.23 | 4573 | |
| Pipestone Hot Springs | city | Montana | United States | 45.89 | -112.23 | 4570 | |
| Plains | city | Montana | United States | 47.46 | -114.88 | 2598 | |
| Pleasant Park Mobile Home Court | city | Montana | United States | 47.48 | -111.31 | 3398 | |
| Pleasant Prairie | city | Montana | United States | 48.59 | -105.08 | 2509 | |
| Pleasant Valley (historical) | city | Montana | United States | 48.06 | -105.58 | 1998 | |
| Pleasant Valley (historical) | city | Montana | United States | 47.95 | -110.68 | 2926 | |
| Pleasant Valley Colony | city | Montana | United States | 47.36 | -111.08 | 4189 | |
| Pleasant View | city | Montana | United States | 47.04 | -104.93 | 2509 | |
| Plentywood | city | Montana | United States | 48.77 | -104.56 | 2070 | |
| Plevna | city | Montana | United States | 46.42 | -104.52 | 2759 | |
| Polaris | city | Montana | United States | 45.37 | -113.12 | 6709 | |
| Polebridge | city | Montana | United States | 48.77 | -114.29 | 3599 | |
| Polson | city | Montana | United States | 47.69 | -114.16 | 3349 | |
| Pompeys Pillar | city | Montana | United States | 45.99 | -107.95 | 2910 | |
| Pondera Colony | city | Montana | United States | 48.26 | -112.39 | 4189 | |
| Ponderosa Mobile Home Park | city | Montana | United States | 46.30 | -114.05 | 4189 | |
| Ponderosa Trailer Court | city | Montana | United States | 45.68 | -111.07 | 5029 | |
| Pony | city | Montana | United States | 45.66 | -111.89 | 5869 | |
| Poplar | city | Montana | United States | 48.11 | -105.20 | 1998 | |
| Poplars Trailer Court | city | Montana | United States | 48.53 | -109.70 | 2604 | |
| Porcupine (historical) | city | Montana | United States | 46.29 | -106.66 | 2509 | |
| Portage | city | Montana | United States | 47.65 | -111.12 | 3392 | |
| Portal | city | Montana | United States | 46.34 | -112.12 | 6000 | |
| Porters Corner | city | Montana | United States | 46.25 | -113.33 | 5869 | |
| Post Creek | city | Montana | United States | 47.40 | -114.10 | 2798 | |
| Posts Trailer Court | city | Montana | United States | 48.40 | -115.54 | 2509 | |
| Potomac | city | Montana | United States | 46.88 | -113.58 | 3628 | |
| Potts Trailer Court | city | Montana | United States | 45.78 | -111.18 | 4471 | |
| Powderville | city | Montana | United States | 45.76 | -105.12 | 2821 | |
| Power | city | Montana | United States | 47.72 | -111.69 | 3730 | |
| Power Plant (historical) | city | Montana | United States | 47.74 | -108.90 | 2509 | |
| Powers | city | Montana | United States | 45.80 | -111.16 | 4402 | |
| Pownal | city | Montana | United States | 47.41 | -110.19 | 3395 | |
| Prairie Dale (historical) | city | Montana | United States | 45.70 | -104.50 | 3349 | |
| Prairie Elk (historical) | city | Montana | United States | 47.78 | -105.86 | 2509 | |
| Prairie Mobile Village | city | Montana | United States | 46.63 | -111.93 | 3772 | |
| Pray | city | Montana | United States | 45.38 | -110.68 | 5029 | |
| Presserville (historical) | city | Montana | United States | 47.83 | -105.49 | 2509 | |
| Preston | city | Montana | United States | 46.74 | -111.36 | 5869 | |
| Primrose | city | Montana | United States | 46.93 | -114.17 | 3349 | |
| Princeton | city | Montana | United States | 46.42 | -113.17 | 5869 | |
| Prison Farm | city | Montana | United States | 46.38 | -112.73 | 5029 | |
| Proctor | city | Montana | United States | 47.89 | -114.31 | 3349 | |
| Pryor | city | Montana | United States | 45.43 | -108.53 | 4189 | |
| Purewater (historical) | city | Montana | United States | 47.22 | -106.23 | 2509 |