California County Map With Cities
By Marko Visic · Updated Oct 5, 2026
California has 58 counties, covering 155,860 square miles of land. The Census Bureau estimates its population at 39,355,309 as of July 1, 2025. The largest county by land area is San Bernardino County; the most populous is Los Angeles County; the least populous is Alpine County.
Tap or click any county for details. Need a printable version? Blank California map (PDF/PNG/SVG).
All 58 California counties
| County | FIPS code | Population (July 1, 2025) ▼ | Change since April 2020 | Land area (sq mi) | People per sq mi | Median household income (2020–2024) |
|---|---|---|---|---|---|---|
| Los Angeles County | 06037 | 9,694,934 | -3.2% | 4,060 | 2,388 | $90,112 |
| San Diego County | 06073 | 3,282,248 | -0.5% | 4,211 | 779 | $106,268 |
| Orange County | 06059 | 3,149,507 | -1.2% | 793 | 3,970 | $116,289 |
| Riverside County | 06065 | 2,544,916 | +5.2% | 7,209 | 353 | $93,074 |
| San Bernardino County | 06071 | 2,224,091 | +1.9% | 20,068 | 111 | $85,478 |
| Santa Clara County | 06085 | 1,914,391 | -1.1% | 1,291 | 1,483 | $164,281 |
| Alameda County | 06001 | 1,636,630 | -2.7% | 737 | 2,219 | $129,367 |
| Sacramento County | 06067 | 1,618,460 | +2.1% | 965 | 1,677 | $92,175 |
| Contra Costa County | 06013 | 1,170,070 | +0.3% | 717 | 1,632 | $127,229 |
| Fresno County | 06019 | 1,035,456 | +2.7% | 5,959 | 174 | $74,201 |
| Kern County | 06029 | 927,068 | +2.0% | 8,135 | 114 | $70,210 |
| Ventura County | 06111 | 830,851 | -1.6% | 1,841 | 451 | $109,797 |
| San Francisco County | 06075 | 826,079 | -6.0% | 47 | 17,695 | $140,970 |
| San Joaquin County | 06077 | 823,815 | +5.7% | 1,392 | 592 | $92,179 |
| San Mateo County | 06081 | 743,568 | -2.7% | 449 | 1,658 | $158,855 |
| Stanislaus County | 06099 | 557,719 | +0.8% | 1,496 | 373 | $81,468 |
| Sonoma County | 06097 | 486,444 | -0.5% | 1,575 | 309 | $104,674 |
| Tulare County | 06107 | 485,146 | +2.5% | 4,824 | 101 | $71,300 |
| Solano County | 06095 | 455,376 | +0.4% | 822 | 554 | $100,401 |
| Placer County | 06061 | 442,081 | +9.2% | 1,407 | 314 | $115,998 |
| Santa Barbara County | 06083 | 442,065 | -1.4% | 2,734 | 162 | $98,161 |
| Monterey County | 06053 | 433,729 | -1.7% | 3,282 | 132 | $97,230 |
| Merced County | 06047 | 297,260 | +5.2% | 1,938 | 153 | $65,510 |
| San Luis Obispo County | 06079 | 282,367 | 0.0% | 3,301 | 86 | $97,446 |
| Santa Cruz County | 06087 | 258,852 | -4.9% | 445 | 582 | $111,093 |
| Marin County | 06041 | 253,694 | -3.3% | 520 | 488 | $149,091 |
| Yolo County | 06113 | 224,410 | +3.0% | 1,013 | 222 | $91,752 |
| Butte County | 06007 | 209,211 | -1.1% | 1,637 | 128 | $67,928 |
| El Dorado County | 06017 | 192,323 | +0.6% | 1,708 | 113 | $108,845 |
| Shasta County | 06089 | 181,648 | -0.4% | 3,776 | 48 | $72,636 |
| Imperial County | 06025 | 181,411 | +0.9% | 4,175 | 43 | $57,681 |
| Madera County | 06039 | 167,927 | +7.5% | 2,137 | 79 | $76,627 |
| Kings County | 06031 | 154,327 | +1.2% | 1,391 | 111 | $70,995 |
| Napa County | 06055 | 132,949 | -3.7% | 752 | 177 | $111,471 |
| Humboldt County | 06023 | 131,647 | -3.5% | 3,568 | 37 | $61,160 |
| Nevada County | 06057 | 101,911 | -0.3% | 958 | 106 | $89,882 |
| Sutter County | 06101 | 98,787 | -0.8% | 603 | 164 | $79,704 |
| Yuba County | 06115 | 88,691 | +8.7% | 632 | 140 | $76,373 |
| Mendocino County | 06045 | 88,122 | -3.8% | 3,507 | 25 | $68,092 |
| San Benito County | 06069 | 70,082 | +9.2% | 1,389 | 50 | $114,394 |
| Lake County | 06033 | 67,772 | -0.6% | 1,255 | 54 | $60,621 |
| Tehama County | 06103 | 64,665 | -1.9% | 2,949 | 22 | $63,784 |
| Tuolumne County | 06109 | 53,160 | -4.4% | 2,221 | 24 | $77,404 |
| Calaveras County | 06009 | 46,605 | +2.9% | 1,020 | 46 | $78,647 |
| Siskiyou County | 06093 | 42,013 | -4.7% | 6,279 | 7 | $59,095 |
| Amador County | 06005 | 41,876 | +3.4% | 595 | 70 | $88,044 |
| Glenn County | 06021 | 28,141 | -2.7% | 1,314 | 21 | $67,139 |
| Lassen County | 06035 | 28,117 | -14.1% | 4,541 | 6 | $67,403 |
| Del Norte County | 06015 | 26,410 | -4.8% | 1,006 | 26 | $67,058 |
| Colusa County | 06011 | 21,836 | 0.0% | 1,151 | 19 | $75,672 |
| Plumas County | 06063 | 18,583 | -6.1% | 2,553 | 7 | $66,031 |
| Inyo County | 06027 | 18,158 | -4.5% | 10,197 | 2 | $73,991 |
| Mariposa County | 06043 | 16,918 | -1.3% | 1,449 | 12 | $68,412 |
| Trinity County | 06105 | 15,720 | -2.5% | 3,179 | 5 | $53,002 |
| Mono County | 06051 | 12,505 | -5.3% | 3,049 | 4 | $99,415 |
| Modoc County | 06049 | 8,426 | -3.2% | 3,948 | 2 | $59,455 |
| Sierra County | 06091 | 3,098 | -4.1% | 953 | 3 | $63,355 |
| Alpine County | 06003 | 1,043 | -11.5% | 738 | 1 | $105,521 |
FIPS code: the Census Bureau’s five-digit county ID, a two-digit state code plus a three-digit county code. It is not a ZIP code.
How many counties does California have?
California has 58 counties covering 155,860 square miles. The state was admitted to the Union in 1850 as the 31st state.
The largest county by land area is San Bernardino County at 20,068 square miles, home to 2,224,091 residents. The most populous is Los Angeles County with 9,694,934 residents — a density of 2,388 people per square mile. At the other end of the scale, Alpine County has 1,043 residents.
California’s capital is Sacramento, while the largest city is Los Angeles.
Related resources
Download a printable outline of California’s county boundaries from our blank map of California page — available in SVG, PNG, and PDF.
Use the What County Am I In? tool to detect which California county a GPS location or address falls in, or the Address to County Lookup for batch input.
For demographic radius analysis, the Find ZIP Codes in Radius and Population Within Radius tools let you draw a circle around any California address and see every ZIP code and the total population inside.
Two SimpleMapLab studies cover California specifically: the 100-mile radius around Sacramento measures how much of the state lives within 100 miles of its capitol, and the loneliest town in California ranks the state’s most isolated inhabited place. The county-counts blog post puts California’s 58 counties in national context.
Frequently asked questions
- County Population Totals, Vintage 2025: estimates for July 1, 2025, released March 2026
- Gazetteer Files, 2026: county land and water area
- American Community Survey 5-Year Estimates, 2020–2024: median household income (table B19013)
- County boundaries on the map: US Atlas TopoJSON build of the US Census Bureau’s TIGER/Line shapefiles. All figures are US Census Bureau data in the public domain.