| 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 |
| Idaho | 8.31 | 3.06 | -17.47 | -8.95 | -3.4 | 26.51 |
| Ada County | 13.21 | 6.61 | -19.86 | -8.17 | 6.11 | 37.9 |
| Adams County | 10.23 | 1.66 | -24.42 | -50.47 | -17.39 | 51.23 |
| Bannock County | 3.95 | -1.68 | -6.65 | -17.02 | -12.74 | 22.78 |
| Bear Lake County | 1.37 | -2.1 | 8.94 | -15.47 | -9.83 | 4.92 |
| Benewah County | -1.71 | -4.34 | -20.15 | -8.38 | -22.04 | 15.26 |
| Bingham County | 4.06 | -3.26 | -27.97 | -3.67 | -12.78 | 19.45 |
| Blaine County | -2.14 | -2.05 | -15.63 | -14.52 | -21.6 | 38.94 |
| Boise County | -7.79 | 6.1 | -35.81 | -45 | -8.2 | 62.14 |
| Bonner County | 0.46 | 3.14 | -15.27 | -18.11 | -20.67 | 42.36 |
| Bonneville County | 12 | 3.59 | -11.04 | -5.12 | -5.15 | 27.04 |
| Boundary County | 1.98 | -1.5 | -42.98 | 11.31 | -27.22 | 33.22 |
| Butte County | -4.19 | -15.53 | -21.36 | -18.84 | -34.51 | 4.56 |
| Camas County | 1.15 | -9.76 | 0 | -81 | 17.27 | 28.57 |
| Canyon County | 12.5 | 3.8 | -30.64 | -11.21 | 8.78 | 34.82 |
| Caribou County | -1.16 | 3.52 | 10.12 | -4.76 | -11.54 | 18.77 |
| Cassia County | 10.47 | 5.03 | 32.68 | 15.43 | 6.12 | -6.82 |
| Clark County | -8.43 | -36.9 | -37.5 | -39.53 | -53.75 | -24.14 |
| Clearwater County | 4.49 | 1.52 | -48.81 | -21.81 | -4.65 | 20.83 |
| Custer County | 2.54 | -13.47 | -44.65 | -30.83 | -35.16 | 23.24 |
| Elmore County | -9.09 | -7.72 | -53.23 | -28.92 | 6.93 | 28.97 |
| Franklin County | 5.23 | 6.65 | -23.65 | 9.82 | 16.68 | 9.66 |
| Fremont County | 3.25 | 3.6 | -33.81 | -9.54 | 8.36 | 23.19 |
| Gem County | 2.3 | -11.13 | -36.36 | -15.48 | -22.84 | 7.23 |
| Gooding County | 6.38 | -9.19 | -29.02 | -22.57 | -6.12 | -1.87 |
| Idaho County | 6.71 | 14.3 | 15.76 | 0.52 | -17.04 | 46.39 |
| Jefferson County | 17.04 | 12.22 | 11.9 | 0.31 | 3 | 31.29 |
| Jerome County | 12.47 | 8.79 | 45.16 | -17.93 | -9.3 | 29.75 |
| Kootenai County | 8.68 | 5.79 | -5.85 | -4.98 | -6.25 | 26.93 |
| Latah County | 2.21 | 3.23 | 15.43 | -7.32 | -14.6 | 26.14 |
| Lemhi County | -0.36 | 4.3 | 124.76 | -18.79 | -30.31 | 30.62 |
| Lewis County | 4.58 | 4.53 | -29.79 | 20.18 | -4.46 | 12.94 |
| Lincoln County | 16.04 | -7.16 | -41.77 | 30.73 | -26.68 | 21.31 |
| Madison County | 2.14 | -5.36 | -17.69 | -2.07 | -4.96 | -1.48 |
| Minidoka County | 7.87 | 1.77 | -0.71 | -19.63 | -8.61 | 20.28 |
| Nez Perce County | 2.81 | 6.92 | -7.93 | 2.04 | -2.3 | 21.78 |
| Oneida County | 2.34 | 4.31 | 42.06 | -15.02 | -11.11 | 18.53 |
| Owyhee County | 3.36 | -8.57 | 6.61 | -31.93 | -16.02 | 7.37 |
| Payette County | 0.74 | -0.63 | -20.46 | -19.98 | 2.28 | 13.29 |
| Power County | 0.55 | -5.64 | -2.8 | -21.6 | -30.42 | 26.93 |
| Shoshone County | -1.74 | -6.68 | -45.19 | -7.29 | -17.52 | 12.56 |
| Teton County | 22.12 | 23.41 | -6.67 | 19.05 | 20.63 | 67.01 |
| Twin Falls County | 10.23 | 4.03 | -15.98 | 5.43 | 9.04 | 7.85 |
| Valley County | 12.15 | -20.37 | -71.7 | -30.08 | -44.77 | 17.9 |
| Washington County | 0.14 | -7.37 | -49.36 | -22.87 | -7.8 | 9.91 |
Source: Gavop.com and Census Bureau