| County/Place | Population Percentage Change Latest to Earliest | Percentage Change in total owner occupied | Percentage Change in below 35 years age group | Percentage Change in 35 to 44 years age group | Percentage Change in 45 to 59 years age group | Percentage Change in above 60 years age group |
|---|---|---|---|---|---|---|
| United States | 4.99 | -0.81 | -18.96 | -17.74 | -2.61 | 17.58 |
| Anaconda-Deer Lodge County | 3.77 | -7.38 | -52.29 | -27.27 | -2.92 | 4.92 |
| Montana | 6.11 | 6.98 | 1.2 | -6.88 | -4.25 | 26.55 |
| Beaverhead County | 4.55 | 10.43 | 3.52 | -34.08 | 9.13 | 34.05 |
| Big Horn County | 2.59 | -9.11 | 5.52 | -41.12 | -21.1 | 18.08 |
| Blaine County | 1.27 | -2.51 | -35.98 | -10.92 | -1.79 | 10.6 |
| Broadwater County | 23.69 | 62.32 | 159.57 | 28.27 | 49.23 | 79.96 |
| Carbon County | 5.41 | 13.36 | -16.12 | -26.61 | -10.25 | 67.41 |
| Carter County | -2.62 | -0.93 | 123.08 | -6.12 | -17.96 | 6.4 |
| Cascade County | 0.22 | -2.11 | -12.14 | -14.62 | -10.35 | 14.32 |
| Chouteau County | 12.1 | -1.71 | 80 | 5.3 | -13.17 | 0.93 |
| Custer County | 7.33 | -1.07 | -17.02 | -28.02 | 7.04 | 9.37 |
| Daniels County | 18.54 | 20.11 | 48.08 | 47.37 | 22.15 | 5.9 |
| Dawson County | 9.57 | 5.52 | 48.69 | 76.04 | -16.71 | 2.33 |
| Deer Lodge County | 3.77 | -7.38 | -52.29 | -27.27 | -2.92 | 4.92 |
| Fallon County | 15.05 | -4.22 | 51.09 | 13.64 | -21.52 | -7.86 |
| Fergus County | 2.23 | 5.23 | -2.49 | 6.61 | -14.84 | 23.31 |
| Flathead County | 7.7 | 15.16 | 6.74 | -15.34 | 10.96 | 36.62 |
| Gallatin County | 10.16 | 15.74 | 0.44 | 22.82 | 2.01 | 40.44 |
| Garfield County | -7.75 | -15.1 | 40 | -38 | -48.67 | 15.09 |
| Glacier County | 1.95 | -7.39 | -47.56 | -16.73 | -9.32 | 9.51 |
| Golden Valley County | -13.4 | -7.39 | 100 | -59.32 | 3.9 | 6.9 |
| Granite County | 10 | 23.17 | -16.28 | -38.74 | 3.19 | 60.61 |
| Hill County | 0.54 | -0.81 | -13.06 | 19.72 | -12.94 | 10.82 |
| Jefferson County | 3.57 | 18 | 98.08 | 8.37 | -13.97 | 63.45 |
| Judith Basin County | -3.85 | -10 | 20 | 18.64 | 5.65 | -23.73 |
| Lake County | 3.25 | 12.56 | 45.53 | -21.68 | -4.93 | 35.41 |
| Lewis and Clark County | 8.78 | 8.97 | 14.7 | -7.14 | 4.18 | 19.97 |
| Liberty County | 12.81 | 18.75 | -17.86 | -21.31 | 12.83 | 41.18 |
| Lincoln County | 3.42 | 9.73 | 22.74 | -17.65 | -10 | 34.47 |
| McCone County | -1.09 | 1.34 | 18.52 | -38.27 | -4.95 | 16.81 |
| Madison County | 6.19 | 13.14 | 35.71 | -15.26 | -27.84 | 64.67 |
| Meagher County | 16.58 | 22.12 | -20.59 | 79.55 | -1.6 | 40.32 |
| Mineral County | 8.72 | 6.78 | -69.51 | -2.68 | -35.45 | 60.35 |
| Missoula County | 5.99 | 10.15 | 15.47 | -4.43 | -3.92 | 32.42 |
| Musselshell County | 8.54 | 1.41 | 255 | -26.9 | -16.07 | 9.14 |
| Park County | -1.42 | 4.92 | -18.94 | -21.14 | -11.59 | 46.63 |
| Petroleum County | -13.48 | -9.49 | -100 | -12.5 | -4 | 4.23 |
| Phillips County | 5.25 | -7.82 | -21.48 | -36.15 | -7.76 | 7.35 |
| Pondera County | 5.03 | -3.53 | 18.52 | -23.76 | -11.3 | 8.21 |
| Powder River County | 2.1 | 13.36 | 3.85 | -54.88 | 5.78 | 52.46 |
| Powell County | -1.16 | -6.38 | 7.04 | -73.61 | -8.82 | 36.52 |
| Prairie County | 36.65 | 13.57 | -21.05 | 491.67 | -19.51 | 17.98 |
| Ravalli County | 1.9 | 3.35 | 17.85 | -28.13 | -11.43 | 27.6 |
| Richland County | 21.95 | 12.46 | 98.78 | 16.79 | -4.67 | 15.23 |
| Roosevelt County | 8.22 | -17.89 | -16.48 | -12.31 | -34.8 | 0.51 |
| Rosebud County | 2.19 | 1.35 | -24.41 | 15.12 | -12.44 | 24.68 |
| Sanders County | 3.62 | 10.42 | 47.02 | -20.65 | -19.71 | 38.19 |
| Sheridan County | 1.74 | 0.32 | 54.88 | 4.67 | -25.62 | 14.56 |
| Silver Bow County | 5.53 | 1.75 | -0.36 | -14.45 | 0 | 11.14 |
| Stillwater County | 8.34 | 19.47 | -4.35 | 21.8 | 2.56 | 42.42 |
| Sweet Grass County | -1.14 | 2.91 | -26.47 | -5.47 | -16.79 | 31.7 |
| Teton County | -0.95 | -7.31 | 76.25 | -59.01 | -14.12 | 13.84 |
| Toole County | 0.78 | -7.96 | 47.83 | -17.7 | -7.31 | -12.3 |
| Treasure County | -10.96 | -7.41 | -18.75 | -92.5 | -1.27 | 21.3 |
| Valley County | 10 | 0.09 | -2.23 | 38.39 | -9.64 | 0.2 |
| Wheatland County | 4.81 | -17.29 | 60 | -67.06 | -22.87 | -5.65 |
| Wibaux County | 6.94 | 3.28 | 100 | -23.68 | -40.3 | 53.13 |
| Yellowstone County | 9.44 | 7.47 | -13.9 | 4.58 | -1.35 | 28.24 |
Source: Gavop.com and Census Bureau