# Counties in Washington by average household size, 2024

All 39 values come from U.S. Census Bureau for 2024, so the places are comparable.

- Indicator id: `average_household_size`
- Unit: persons per household
- Definition: Average number of persons per private household. EU countries: EU-SILC. United States: American Community Survey five-year estimate of people in households divided by occupied housing units, where the period shown is the last year of the five-year span.
- Source: U.S. Census Bureau, American Community Survey 5-year estimates, table B25010: average household size of occupied housing units (https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/data/5YRData/acsdt5y2024-b25010.dat)
- Publisher page: https://invokely.ai/en/publishers/us-census-bureau
- Retrieved: 2026-10-12
- Citation: U.S. Census Bureau. American Community Survey 5-year estimates, table B25010: average household size of occupied housing units. https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/data/5YRData/acsdt5y2024-b25010.dat. Retrieved 2026-10-12.
- Web page: https://invokely.ai/rankings/average-household-size/washington-counties

| Rank | Place | persons per household |
|---:|---|---:|
| 1 | Adams County | 3.3 |
| 2 | Franklin County | 3.2 |
| 3 | Yakima County | 2.9 |
| 4 | Grant County | 2.8 |
| 5 | Douglas County | 2.7 |
| 6 | Benton County | 2.7 |
| 7 | Snohomish County | 2.6 |
| 8 | Clark County | 2.6 |
| 9 | Pierce County | 2.6 |
| 10 | Lewis County | 2.6 |
| 11 | Mason County | 2.6 |
| 12 | Cowlitz County | 2.5 |
| 13 | Chelan County | 2.5 |
| 13 | Kitsap County | 2.5 |
| 15 | Thurston County | 2.5 |
| 16 | Skagit County | 2.5 |
| 16 | Stevens County | 2.5 |
| 18 | Skamania County | 2.5 |
| 19 | Spokane County | 2.4 |
| 19 | Walla Walla County | 2.4 |
| 21 | Grays Harbor County | 2.4 |
| 22 | Whatcom County | 2.4 |
| 23 | King County | 2.4 |
| 24 | Lincoln County | 2.4 |
| 25 | Asotin County | 2.4 |
| 25 | Island County | 2.4 |
| 27 | Pend Oreille County | 2.3 |
| 28 | Klickitat County | 2.3 |
| 28 | Okanogan County | 2.3 |
| 30 | Ferry County | 2.3 |
| 31 | Kittitas County | 2.3 |
| 32 | Garfield County | 2.3 |
| 33 | Wahkiakum County | 2.2 |
| 34 | Clallam County | 2.2 |
| 34 | Whitman County | 2.2 |
| 36 | Pacific County | 2.2 |
| 37 | Columbia County | 2.1 |
| 38 | San Juan County | 2 |
| 39 | Jefferson County | 2 |