California is divided into 58 counties, each functioning as a vital unit of local government. These counties encompass a diverse range of communities, from major metropolitan areas like Los Angeles and San Francisco to rural regions and coastal towns. Use this interactive map and search tools to explore California’s counties, discover cities within each region, and look up ZIP codes for specific locations. Whether you’re planning a move, researching demographics, or simply curious about the Golden State, this tool provides a comprehensive guide to understanding California’s geographic and administrative layout.

Interactive Map of All California Counties

Click on any county below to explore more about it.

No.	County Name	Largest City	County Map & Zip Code Link
1	Alameda	Oakland	Alameda County Map Link
2	Alpine	Markleeville	Alpine County Map Link
3	Amador	Jackson	Amador County Map Link
4	Butte	Chico	Butte County Map Link
5	Calaveras	San Andreas	Calaveras County Map Link
6	Colusa	Colusa	Colusa County Map Link
7	Contra Costa	Concord	Contra Costa County Map Link
8	Del Norte	Crescent City	Del Norte County Map Link
9	El Dorado	South Lake Tahoe	El Dorado County Map Link
10	Fresno	Fresno	Fresno County Map Link
11	Glenn	Willows	Glenn County Map Link
12	Humboldt	Eureka	Humboldt County Map Link
13	Imperial	El Centro	Imperial County Map Link
14	Inyo	Bishop	Inyo County Map Link
15	Kern	Bakersfield	Kern County Map Link
16	Kings	Hanford	Kings County Map Link
17	Lake	Clearlake	Lake County Map Link
18	Lassen	Susanville	Lassen County Map Link
19	Los Angeles	Los Angeles	Los Angeles County Map Link
20	Madera	Madera	Madera County Map Link
21	Marin	San Rafael	Marin County Map Link
22	Mariposa	Mariposa	Mariposa County Map Link
23	Mendocino	Ukiah	Mendocino County Map Link
24	Merced	Merced	Merced County Map Link
25	Modoc	Alturas	Modoc County Map Link
26	Mono	Mammoth Lakes	Mono County Map Link
27	Monterey	Salinas	Monterey County Map Link
28	Napa	Napa	Napa County Map Link
29	Nevada	Truckee	Nevada County Map Link
30	Orange	Anaheim	Orange County Map Link
31	Placer	Roseville	Placer County Map Link
32	Plumas	Quincy	Plumas County Map Link
33	Riverside	Riverside	Riverside County Map Link
34	Sacramento	Sacramento	Sacramento County Map Link
35	San Benito	Hollister	San Benito County Map Link
36	San Bernardino	San Bernardino	San Bernardino County Map Link
37	San Diego	San Diego	San Diego County Map Link
38	San Francisco	San Francisco	San Francisco County Map Link
39	San Joaquin	Stockton	San Joaquin County Map Link
40	San Luis Obispo	San Luis Obispo	San Luis Obispo County Map Link
41	San Mateo	Daly City	San Mateo County Map Link
42	Santa Barbara	Santa Maria	Santa Barbara County Map Link
43	Santa Clara	San Jose	Santa Clara County Map Link
44	Santa Cruz	Santa Cruz	Santa Cruz County Map Link
45	Shasta	Redding	Shasta County Map Link
46	Sierra	Downieville	Sierra County Map Link
47	Siskiyou	Yreka	Siskiyou County Map Link
48	Solano	Vallejo	Solano County Map Link
49	Sonoma	Santa Rosa	Sonoma County Map Link
50	Stanislaus	Modesto	Stanislaus County Map Link
51	Sutter	Yuba City	Sutter County Map Link
52	Tehama	Red Bluff	Tehama County Map Link
53	Trinity	Weaverville	Trinity County Map Link
54	Tulare	Visalia	Tulare County Map Link
55	Tuolumne	Sonora	Tuolumne County Map Link
56	Ventura	Oxnard	Ventura County Map Link
57	Yolo	Davis	Yolo County Map Link
58	Yuba	Marysville	Yuba County Map Link

California County Map Download

You can download the California County Map from below:

Frequently Asked Questions

The largest county in California by area is San Bernardino County.

Area: Approximately 20,105 square miles (52,072 km²)
Largest City: San Bernardino
Fun Fact: It’s not only the largest in California but also the largest county by area in the entire United States (excluding boroughs and census areas in Alaska).

The smallest county in California by area is San Francisco County.

Area: Approximately 47 square miles (121 km²)
Largest (and only) City: San Francisco
Special Fact: San Francisco is a consolidated city-county, meaning the city and county share the same government. It’s the only such case in California.

California has 58 counties.

Each county functions as a local level of government within the state and has its own set of responsibilities, including law enforcement, public health, and infrastructure services.

Source: Wikipedia, US Census