| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| La Bree Mobile Homes Incorporated | city | Montana | United States | 47.11 | -104.72 | 2040 | |
| La Casa Trailer Park | city | Montana | United States | 45.87 | -112.10 | 4376 | |
| La Chapelle Place | city | Montana | United States | 47.34 | -112.29 | 4399 | |
| La Hood Park | city | Montana | United States | 45.85 | -111.92 | 4379 | |
| La Salle | city | Montana | United States | 48.31 | -114.24 | 3349 | |
| Lake Mary Ronan | city | Montana | United States | 47.94 | -114.39 | 3727 | |
| Lake McDonald | city | Montana | United States | 48.62 | -113.87 | 3375 | |
| Lakeshore Summer Home Area | city | Montana | United States | 44.74 | -111.21 | 6709 | |
| Lakeside | city | Montana | United States | 46.68 | -111.83 | 3667 | |
| Lakeside | city | Montana | United States | 48.02 | -114.22 | 3349 | |
| Lakeside | city | Montana | United States | 48.08 | -104.18 | 1952 | |
| Lakeside Plaza Mobile Home Park | city | Montana | United States | 48.53 | -109.70 | 2604 | |
| Lakeview | city | Montana | United States | 44.60 | -111.81 | 6709 | |
| Lakeview | city | Montana | United States | 44.80 | -111.24 | 6709 | |
| Lakeview (historical) | city | Montana | United States | 48.00 | -106.50 | 2509 | |
| Lambert | city | Montana | United States | 47.68 | -104.62 | 2509 | |
| Lame Deer | city | Montana | United States | 45.62 | -106.67 | 3398 | |
| Lanark | city | Montana | United States | 48.14 | -104.36 | 1998 | |
| Lander Crossing | city | Montana | United States | 47.64 | -110.93 | 3349 | |
| Landtsheim (historical) | city | Montana | United States | 47.12 | -104.79 | 2509 | |
| Landusky | city | Montana | United States | 47.90 | -108.62 | 4189 | |
| Langford City (historical) | city | Montana | United States | 46.55 | -111.03 | 5029 | |
| Larb (historical) | city | Montana | United States | 48.21 | -107.30 | 2509 | |
| Larchwood | city | Montana | United States | 47.85 | -115.63 | 2509 | |
| Laredo | city | Montana | United States | 48.43 | -109.88 | 2614 | |
| Larslan | city | Montana | United States | 48.58 | -106.19 | 2926 | |
| Laurel | city | Montana | United States | 45.67 | -108.77 | 3349 | |
| Laurin | city | Montana | United States | 45.35 | -112.12 | 5131 | |
| Lavina | city | Montana | United States | 46.29 | -108.94 | 3480 | |
| Lay Settlement (historical) | city | Montana | United States | 45.61 | -111.15 | 5196 | |
| Lazy Day (historical) | city | Montana | United States | 45.29 | -110.24 | 7099 | |
| Lazy Day Court | city | Montana | United States | 48.37 | -114.21 | 3349 | |
| Leadville | city | Montana | United States | 46.31 | -112.54 | 7647 | |
| Leary Place | city | Montana | United States | 45.02 | -112.06 | 6709 | |
| Lebo | city | Montana | United States | 46.34 | -110.39 | 5869 | |
| Ledger | city | Montana | United States | 48.26 | -111.82 | 3398 | |
| Lee (historical) | city | Montana | United States | 45.87 | -106.39 | 3349 | |
| Leedy (historical) | city | Montana | United States | 47.66 | -107.60 | 2509 | |
| Legg (historical) | city | Montana | United States | 47.59 | -107.90 | 2509 | |
| Lehigh | city | Montana | United States | 47.04 | -110.21 | 4599 | |
| Leibrands Trailer Court | city | Montana | United States | 48.79 | -105.41 | 2509 | |
| Leisure Village | city | Montana | United States | 46.24 | -114.15 | 3677 | |
| Leisure Village Mobile Home Park | city | Montana | United States | 46.64 | -111.94 | 3763 | |
| Leiterville | city | Montana | United States | 45.55 | -112.12 | 7549 | |
| Lennep | city | Montana | United States | 46.42 | -110.54 | 5226 | |
| Leonard Place | city | Montana | United States | 45.02 | -112.05 | 6853 | |
| Leroy | city | Montana | United States | 47.87 | -109.32 | 3497 | |
| Lewiston (historical) | city | Montana | United States | 46.46 | -111.99 | 4399 | |
| Lewistown | city | Montana | United States | 47.06 | -109.43 | 4189 | |
| Lewistown Heights | city | Montana | United States | 47.08 | -109.45 | 4189 | |
| Lewistown Junction | city | Montana | United States | 47.05 | -109.42 | 4189 | |
| Lexley Acres Mobile Home Park | city | Montana | United States | 45.76 | -111.18 | 4484 | |
| Libby | city | Montana | United States | 48.39 | -115.56 | 2509 | |
| Liberty Center (historical) | city | Montana | United States | 47.93 | -111.99 | 3605 | |
| Lima | city | Montana | United States | 44.64 | -112.59 | 6709 | |
| Limestone | city | Montana | United States | 45.48 | -109.90 | 5869 | |
| Lincoln | city | Montana | United States | 46.95 | -112.68 | 4573 | |
| Lindisfarne | city | Montana | United States | 47.81 | -114.23 | 3349 | |
| Lindsay | city | Montana | United States | 47.22 | -105.15 | 2696 | |
| Lingenpolter | city | Montana | United States | 46.53 | -112.97 | 5029 | |
| Lingshire | city | Montana | United States | 46.84 | -111.41 | 5029 | |
| Linley (historical) | city | Montana | United States | 45.28 | -109.42 | 5200 | |
| Lion City (historical) | city | Montana | United States | 45.61 | -112.93 | 8599 | |
| Lippard | city | Montana | United States | 47.95 | -110.39 | 2598 | |
| Lipske Trailer Court | city | Montana | United States | 46.76 | -114.08 | 3349 | |
| Lismas (historical) | city | Montana | United States | 47.94 | -106.53 | 2509 | |
| Little Bear (historical) | city | Montana | United States | 45.54 | -111.17 | 5869 | |
| Little Chicago (historical) | city | Montana | United States | 47.53 | -111.28 | 3398 | |
| Little Crooked (historical) | city | Montana | United States | 47.51 | -108.55 | 2900 | |
| Living Springs | city | Montana | United States | 46.59 | -109.54 | 4599 | |
| Livingston | city | Montana | United States | 45.66 | -110.56 | 4501 | |
| Lloyd | city | Montana | United States | 48.29 | -109.36 | 4199 | |
| Lockwood | city | Montana | United States | 45.82 | -108.41 | 3349 | |
| Lodge Grass | city | Montana | United States | 45.31 | -107.36 | 3366 | |
| Lodge Pole | city | Montana | United States | 48.03 | -108.53 | 3487 | |
| Logan | city | Montana | United States | 45.88 | -111.43 | 4212 | |
| Lohman | city | Montana | United States | 48.59 | -109.41 | 2509 | |
| Lolo | city | Montana | United States | 46.76 | -114.08 | 3349 | |
| Lolo Hot Springs | city | Montana | United States | 46.73 | -114.53 | 4399 | |
| Lolo Peak Trailer Court | city | Montana | United States | 46.75 | -114.09 | 3349 | |
| Loma | city | Montana | United States | 47.94 | -110.50 | 2598 | |
| Lombard | city | Montana | United States | 46.11 | -111.40 | 4189 | |
| Lone Tree (historical) | city | Montana | United States | 48.38 | -112.06 | 3500 | |
| Lonepine | city | Montana | United States | 47.70 | -114.64 | 3349 | |
| Lonesome Hurst Summer Home Area | city | Montana | United States | 44.74 | -111.24 | 6709 | |
| Lonesome Prairie (historical) | city | Montana | United States | 48.24 | -110.27 | 2798 | |
| Lonetree (historical) | city | Montana | United States | 47.54 | -110.28 | 3349 | |
| Loring | city | Montana | United States | 48.79 | -107.86 | 2700 | |
| Loring Colony | city | Montana | United States | 48.79 | -107.97 | 2880 | |
| Loring Colony School | city | Montana | United States | 48.79 | -107.97 | 2880 | |
| Lost Creek | city | Montana | United States | 46.18 | -112.95 | 5406 | |
| Lost Creek (historical) | city | Montana | United States | 47.52 | -105.58 | 2509 | |
| Lost Lake (historical) | city | Montana | United States | 48.64 | -108.28 | 2900 | |
| Lothair | city | Montana | United States | 48.47 | -111.23 | 3349 | |
| Lothrop | city | Montana | United States | 46.99 | -114.45 | 3349 | |
| Louisville | city | Montana | United States | 46.56 | -111.80 | 4189 | |
| Lower Bridger (historical) | city | Montana | United States | 45.70 | -110.93 | 5255 | |
| Lower Ellis Place | city | Montana | United States | 47.28 | -112.29 | 4429 | |
| Lower Madison (historical) | city | Montana | United States | 45.84 | -111.48 | 4189 | |
| Loweth | city | Montana | United States | 46.37 | -110.71 | 6000 | |
| Lowrane (historical) | city | Montana | United States | 48.94 | -107.82 | 2611 | |
| Lowry | city | Montana | United States | 47.51 | -112.01 | 3756 | |
| Lozeau | city | Montana | United States | 47.12 | -114.78 | 2798 | |
| Ludington | city | Montana | United States | 47.83 | -104.06 | 1925 | |
| Lufboro (historical) | city | Montana | United States | 47.28 | -104.46 | 2509 | |
| Lupfer | city | Montana | United States | 48.48 | -114.51 | 3349 | |
| Lustre | city | Montana | United States | 48.39 | -105.88 | 2736 | |
| Luther | city | Montana | United States | 45.28 | -109.43 | 5200 | |
| Lux | city | Montana | United States | 45.73 | -111.07 | 5029 |