Counties of California
California has 58 counties, home to 39,355,309 people across 403,677 km². Each county below opens its full profile — Census Bureau and American Community Survey figures, and how it ranks against the rest of California and the country.
- Counties
- 58
- Population
- 39,355,309
- 2025 estimate
- #1 of 51 states
- Area
- 403,677 km²
- #3 of 51 states
- Density
- 97
- per km²
- #12 of 51 states
How California's counties spread
Across California's counties: the middle value, where the state ranks among all states (1 = highest median), and which county is highest and lowest. Medians rather than totals, since most of these are rates that cannot be added up.
Amenities & Infrastructure
| Indicator | Median | Rank | Highest | Lowest |
|---|---|---|---|---|
| Households with Broadband2024 | 91.8% | 5 / 50 | Marin County95.8% | Sierra County79.5% |
| Median Gross Rent2024 | $1,624 | 2 / 50 | San Mateo County$2,922 | Modoc County$836 |
| Median Home Value2024 | $481,100 | 4 / 50 | San Mateo County$1,559,600 | Modoc County$224,700 |
| Owner-Occupied Homes2024 | 62.8% | 50 / 50 | Calaveras County84.0% | San Francisco County38.2% |
| Vacant Homes2024 | 10.1% | 40 / 50 | Alpine County72.1% | Contra Costa County3.5% |
Demography
| Indicator | Median | Rank | Highest | Lowest |
|---|---|---|---|---|
| Aged 65 and Over2024 | 17.4% | 46 / 50 | Sierra County35.1% | Kings County10.8% |
| American Indian & Alaska Native2024 | 0.3% | 13 / 50 | Alpine County25.1% | Sierra County0.0% |
| Asian, non-Hispanic2024 | 4.5% | 3 / 50 | Santa Clara County40.3% | Sierra County0.0% |
| Average Household Size2024people | 2.7 | 3 / 50 | Alpine County3.6 | Mariposa County2 |
| Black, non-Hispanic2024 | 1.7% | 25 / 50 | Solano County12.3% | Alpine County0.0% |
| Foreign-Born2024 | 19.4% | 1 / 50 | Santa Clara County41.5% | Sierra County3.8% |
| Hispanic or Latino2024 | 27.6% | 4 / 50 | Imperial County86.0% | Trinity County6.1% |
| Median Age2024years | 39.7 | 42 / 50 | Trinity County54.9 | Merced County31.8 |
| Sex Ratio2024per 1,000 males | 1,000 | 27 / 50 | Sierra County1,147 | Lassen County618 |
| Speak a Language Other Than English2024 | 33.7% | 1 / 50 | Imperial County75.3% | Trinity County6.4% |
| Under 182024 | 20.9% | 29 / 50 | Tulare County29.8% | San Francisco County13.7% |
| Veterans2024 | 5.3% | 46 / 50 | Modoc County11.7% | San Francisco County2.5% |
| White, non-Hispanic2024 | 48.0% | 48 / 50 | Sierra County86.0% | Imperial County9.1% |
Economy
| Indicator | Median | Rank | Highest | Lowest |
|---|---|---|---|---|
| Below Poverty Line2024 | 12.8% | 20 / 50 | Trinity County20.7% | Sierra County4.4% |
| Households on SNAP2024 | 12.8% | 21 / 50 | Imperial County28.7% | Mono County4.6% |
| Income Inequality2024index | 0.465 | 8 / 50 | San Francisco County0.522 | Lassen County0.412 |
| Median Household Income2024 | $83,473 | 8 / 50 | Santa Clara County$164,281 | Trinity County$53,002 |
| Per Capita Income2024 | $41,592 | 13 / 50 | Marin County$93,920 | Imperial County$23,552 |
| Unemployment Rate2024 | 6.5% | 2 / 50 | Sierra County12.6% | Inyo County2.5% |
Education
| Indicator | Median | Rank | Highest | Lowest |
|---|---|---|---|---|
| Bachelor's Degree or Higher2024 | 25.7% | 18 / 50 | Marin County61.1% | Lassen County13.1% |
| High School or Higher2024 | 88.4% | 38 / 50 | Alpine County96.3% | Imperial County71.5% |
Health Coverage
| Indicator | Median | Rank | Highest | Lowest |
|---|---|---|---|---|
| No Health Insurance2024 | 6.3% | 29 / 50 | Sierra County13.7% | Placer County3.2% |
| With a Disability2024 | 12.8% | 41 / 50 | Plumas County24.6% | Santa Clara County9.0% |
Population & Density
| Indicator | Median | Rank | Highest | Lowest |
|---|---|---|---|---|
| Population2025 | 186,986 | 5 / 50 | Los Angeles County9,694,934 | Alpine County1,043 |
| Population Density2025/km² | 43 | 14 / 50 | San Francisco County6,832 | Inyo County1 |
Work & Commute
| Indicator | Median | Rank | Highest | Lowest |
|---|---|---|---|---|
| Commute by Public Transit2024 | 0.7% | 11 / 50 | San Francisco County18.7% | Plumas County0.0% |
| Households with No Vehicle2024 | 5.5% | 24 / 50 | San Francisco County30.2% | Calaveras County2.3% |
| Mean Commute Time2024minutes | 25.7 | 19 / 50 | San Benito County36.6 | Inyo County16 |
| Work from Home2024 | 12.6% | 13 / 50 | Marin County31.5% | Kings County5.2% |
All counties
| County | Population 2025 | Area | Median income |
|---|---|---|---|
| Alameda County | 1,636,630 | 1,910 km² | $129,367 |
| Alpine County | 1,043 | 1,912 km² | $105,521 |
| Amador County | 41,876 | 1,540 km² | $88,044 |
| Butte County | 209,211 | 4,239 km² | $67,928 |
| Calaveras County | 46,605 | 2,642 km² | $78,647 |
| Colusa County | 21,836 | 2,980 km² | $75,672 |
| Contra Costa County | 1,170,070 | 1,857 km² | $127,229 |
| Del Norte County | 26,410 | 2,606 km² | $67,058 |
| El Dorado County | 192,323 | 4,423 km² | $108,845 |
| Fresno County | 1,035,456 | 15,433 km² | $74,201 |
| Glenn County | 28,141 | 3,403 km² | $67,139 |
| Humboldt County | 131,647 | 9,241 km² | $61,160 |
| Imperial County | 181,411 | 10,814 km² | $57,681 |
| Inyo County | 18,158 | 26,411 km² | $73,991 |
| Kern County | 927,068 | 21,069 km² | $70,210 |
| Kings County | 154,327 | 3,603 km² | $70,995 |
| Lake County | 67,772 | 3,251 km² | $60,621 |
| Lassen County | 28,117 | 11,762 km² | $67,403 |
| Los Angeles County | 9,694,934 | 10,516 km² | $90,112 |
| Madera County | 167,927 | 5,534 km² | $76,627 |
| Marin County | 253,694 | 1,347 km² | $149,091 |
| Mariposa County | 16,918 | 3,752 km² | $68,412 |
| Mendocino County | 88,122 | 9,083 km² | $68,092 |
| Merced County | 297,260 | 5,019 km² | $65,510 |
| Modoc County | 8,426 | 10,226 km² | $59,455 |
| Mono County | 12,505 | 7,897 km² | $99,415 |
| Monterey County | 433,729 | 8,500 km² | $97,230 |
| Napa County | 132,949 | 1,948 km² | $111,471 |
| Nevada County | 101,911 | 2,481 km² | $89,882 |
| Orange County | 3,149,507 | 2,055 km² | $116,289 |
| Placer County | 442,081 | 3,645 km² | $115,998 |
| Plumas County | 18,583 | 6,612 km² | $66,031 |
| Riverside County | 2,544,916 | 18,671 km² | $93,074 |
| Sacramento County | 1,618,460 | 2,500 km² | $92,175 |
| San Benito County | 70,082 | 3,597 km² | $114,394 |
| San Bernardino County | 2,224,091 | 51,977 km² | $85,478 |
| San Diego County | 3,282,248 | 10,906 km² | $106,268 |
| San Francisco County | 826,079 | 121 km² | $140,970 |
| San Joaquin County | 823,815 | 3,606 km² | $92,179 |
| San Luis Obispo County | 282,367 | 8,549 km² | $97,446 |
| San Mateo County | 743,568 | 1,162 km² | $158,855 |
| Santa Barbara County | 442,065 | 7,081 km² | $98,161 |
| Santa Clara County | 1,914,391 | 3,344 km² | $164,281 |
| Santa Cruz County | 258,852 | 1,153 km² | $111,093 |
| Shasta County | 181,648 | 9,779 km² | $72,636 |
| Sierra County | 3,098 | 2,469 km² | $63,355 |
| Siskiyou County | 42,013 | 16,262 km² | $59,095 |
| Solano County | 455,376 | 2,128 km² | $100,401 |
| Sonoma County | 486,444 | 4,080 km² | $104,674 |
| Stanislaus County | 557,719 | 3,875 km² | $81,468 |
| Sutter County | 98,787 | 1,561 km² | $79,704 |
| Tehama County | 64,665 | 7,638 km² | $63,784 |
| Trinity County | 15,720 | 8,234 km² | $53,002 |
| Tulare County | 485,146 | 12,494 km² | $71,300 |
| Tuolumne County | 53,160 | 5,752 km² | $77,404 |
| Ventura County | 830,851 | 4,768 km² | $109,797 |
| Yolo County | 224,410 | 2,624 km² | $91,752 |
| Yuba County | 88,691 | 1,637 km² | $76,373 |
Compare California's counties on a map, add layers and run a scatter — open the atlas, or browse all 3,144 US counties or all states.