# Counties in California by average household size, 2024

All 58 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/california-counties

| Rank | Place | persons per household |
|---:|---|---:|
| 1 | Alpine County | 3.6 |
| 2 | Imperial County | 3.5 |
| 3 | Madera County | 3.4 |
| 4 | Merced County | 3.3 |
| 5 | Tulare County | 3.3 |
| 6 | San Benito County | 3.3 |
| 7 | San Bernardino County | 3.2 |
| 8 | San Joaquin County | 3.2 |
| 9 | Kings County | 3.2 |
| 10 | Monterey County | 3.2 |
| 11 | Riverside County | 3.2 |
| 12 | Kern County | 3.1 |
| 13 | Stanislaus County | 3.1 |
| 14 | Fresno County | 3.1 |
| 15 | Sutter County | 2.9 |
| 15 | Ventura County | 2.9 |
| 17 | Yuba County | 2.9 |
| 18 | Colusa County | 2.9 |
| 19 | Glenn County | 2.9 |
| 20 | Orange County | 2.9 |
| 21 | Santa Clara County | 2.8 |
| 22 | Los Angeles County | 2.8 |
| 22 | Santa Barbara County | 2.8 |
| 24 | Solano County | 2.8 |
| 25 | Trinity County | 2.8 |
| 26 | Contra Costa County | 2.8 |
| 27 | San Mateo County | 2.8 |
| 28 | Sacramento County | 2.8 |
| 28 | Yolo County | 2.8 |
| 30 | San Diego County | 2.7 |
| 31 | Alameda County | 2.7 |
| 32 | Napa County | 2.6 |
| 33 | Placer County | 2.6 |
| 34 | Del Norte County | 2.6 |
| 35 | Santa Cruz County | 2.6 |
| 35 | Tehama County | 2.6 |
| 37 | Lassen County | 2.6 |
| 38 | Mendocino County | 2.5 |
| 39 | El Dorado County | 2.5 |
| 39 | Shasta County | 2.5 |
| 41 | Lake County | 2.5 |
| 41 | Sonoma County | 2.5 |
| 43 | Calaveras County | 2.5 |
| 44 | Modoc County | 2.5 |
| 45 | Marin County | 2.4 |
| 46 | San Luis Obispo County | 2.4 |
| 47 | Butte County | 2.4 |
| 48 | Humboldt County | 2.4 |
| 48 | Plumas County | 2.4 |
| 50 | Nevada County | 2.4 |
| 51 | Amador County | 2.4 |
| 52 | Inyo County | 2.3 |
| 52 | Tuolumne County | 2.3 |
| 54 | Siskiyou County | 2.2 |
| 55 | San Francisco County | 2.2 |
| 56 | Mono County | 2.2 |
| 57 | Sierra County | 2.2 |
| 58 | Mariposa County | 2 |