| 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 |
| Washington | 8.04 | 1.61 | -17.07 | -14.16 | -3.65 | 24.79 |
| Adams County | 12.05 | 4.41 | 9.48 | 50.36 | -15.49 | 3.19 |
| Asotin County | 3.97 | 2.14 | -37.99 | -16.77 | -12.18 | 29.3 |
| Benton County | 14.81 | 9.68 | 0.84 | -7.84 | 0.45 | 34.24 |
| Chelan County | 5.09 | 0.62 | -34.29 | -3.26 | -9.86 | 21.22 |
| Clallam County | 3.12 | -0.6 | 12.68 | -14.62 | -23.58 | 16.34 |
| Clark County | 6.8 | 0.35 | -31.68 | -17.19 | -2.4 | 32.3 |
| Columbia County | 0.13 | -2.66 | -39.78 | -12.95 | -18.67 | 15.91 |
| Cowlitz County | 2.47 | 0.3 | -18.25 | -18.9 | -15.67 | 31.53 |
| Douglas County | 9.56 | 5.51 | -12.99 | -8.73 | 0.96 | 23.28 |
| Ferry County | 2.79 | 21.04 | -2.15 | 11.31 | -17.37 | 62.56 |
| Franklin County | 23.92 | 21.87 | 16.89 | 15.67 | 16.61 | 39.09 |
| Garfield County | 4.74 | -0.91 | -34.78 | 43.4 | -9.01 | -0.28 |
| Grant County | 10.12 | 3.23 | 3.66 | -19.08 | 4.53 | 13.37 |
| Grays Harbor County | 0.42 | -1.46 | -44.98 | -12.24 | -5.82 | 16.24 |
| Island County | -1.73 | -5.17 | -9.37 | -29.92 | -13.21 | 7.83 |
| Jefferson County | 2.94 | -0.06 | -46.76 | -25.35 | -27.96 | 28.76 |
| King County | 10.06 | 0.77 | -21.39 | -13.1 | -0.48 | 24.54 |
| Kitsap County | 6.96 | 2.68 | -10.97 | -18.69 | -5.1 | 27.02 |
| Kittitas County | 9.83 | 8.35 | 9.72 | -21.33 | 4.95 | 24.16 |
| Klickitat County | 3.76 | -5.81 | -50.46 | 33.33 | -17.46 | 1.07 |
| Lewis County | 2.8 | -4.36 | -34.66 | -11.14 | -16.78 | 16.33 |
| Lincoln County | 1.17 | -0.52 | -17.91 | -0.24 | -16.92 | 16.03 |
| Mason County | 7.9 | 10.9 | -9.13 | -10.08 | -4.95 | 35.84 |
| Okanogan County | 4.1 | 8.49 | 37.26 | 4.58 | -8.84 | 19.38 |
| Pacific County | -3.26 | -6.34 | -5.9 | -32.03 | -20.2 | 6.55 |
| Pend Oreille County | 1.82 | 2.34 | 55.4 | -41.04 | -3.54 | 16.48 |
| Pierce County | 6.15 | 0.11 | -11.32 | -17.07 | -5.67 | 24.18 |
| San Juan County | 4.32 | 0.66 | -27.65 | -9.3 | -22.19 | 21.86 |
| Skagit County | 2.75 | -0.76 | -16.12 | -16.12 | -10.47 | 17.35 |
| Skamania County | 5.41 | -3.54 | -16.03 | -26.98 | -21.77 | 36.66 |
| Snohomish County | 10.83 | 2.76 | -17.69 | -17.9 | 2.1 | 34.02 |
| Spokane County | 5.69 | 0.02 | -21.18 | -13.53 | -4.94 | 21.55 |
| Stevens County | 4.35 | 5.86 | -11.04 | -14.26 | -5.69 | 27.81 |
| Thurston County | 9.81 | 3.17 | -8.09 | -11.22 | -9.61 | 31.11 |
| Wahkiakum County | 1.51 | 7.3 | -39.34 | -51.67 | 0 | 32.3 |
| Walla Walla County | 3.34 | 7.2 | -12.44 | -10.94 | 5.37 | 20.86 |
| Whatcom County | 7.37 | 6.56 | 3.12 | -8.01 | -5.81 | 27.61 |
| Whitman County | 11.83 | 6.35 | -8.78 | 5.72 | -4.84 | 24.01 |
| Yakima County | 6.22 | -0.93 | -16.5 | -15.26 | -2.01 | 13.83 |
Source: Gavop.com and Census Bureau