Property research by county

California county reference

58 counties and county equivalents in California. Search names or FIPS codes, compare Census geography and keep the original sources with your work.

• Alameda County

  California · FIPS 06001

  1,636,630 residents · 2025 estimate

• Alpine County

  California · FIPS 06003

  1,043 residents · 2025 estimate

• Amador County

  California · FIPS 06005

  41,876 residents · 2025 estimate

• Butte County

  California · FIPS 06007

  209,211 residents · 2025 estimate

• Calaveras County

  California · FIPS 06009

  46,605 residents · 2025 estimate

• Colusa County

  California · FIPS 06011

  21,836 residents · 2025 estimate

• Contra Costa County

  California · FIPS 06013

  1,170,070 residents · 2025 estimate

• Del Norte County

  California · FIPS 06015

  26,410 residents · 2025 estimate

• El Dorado County

  California · FIPS 06017

  192,323 residents · 2025 estimate

• Fresno County

  California · FIPS 06019

  1,035,456 residents · 2025 estimate

• Glenn County

  California · FIPS 06021

  28,141 residents · 2025 estimate

• Humboldt County

  California · FIPS 06023

  131,647 residents · 2025 estimate

• Imperial County

  California · FIPS 06025

  181,411 residents · 2025 estimate

• Inyo County

  California · FIPS 06027

  18,158 residents · 2025 estimate

• Kern County

  California · FIPS 06029

  927,068 residents · 2025 estimate

• Kings County

  California · FIPS 06031

  154,327 residents · 2025 estimate

• Lake County

  California · FIPS 06033

  67,772 residents · 2025 estimate

• Lassen County

  California · FIPS 06035

  28,117 residents · 2025 estimate

• Los Angeles County

  California · FIPS 06037

  9,694,934 residents · 2025 estimate

• Madera County

  California · FIPS 06039

  167,927 residents · 2025 estimate

• Marin County

  California · FIPS 06041

  253,694 residents · 2025 estimate

• Mariposa County

  California · FIPS 06043

  16,918 residents · 2025 estimate

• Mendocino County

  California · FIPS 06045

  88,122 residents · 2025 estimate

• Merced County

  California · FIPS 06047

  297,260 residents · 2025 estimate

• Modoc County

  California · FIPS 06049

  8,426 residents · 2025 estimate

• Mono County

  California · FIPS 06051

  12,505 residents · 2025 estimate

• Monterey County

  California · FIPS 06053

  433,729 residents · 2025 estimate

• Napa County

  California · FIPS 06055

  132,949 residents · 2025 estimate

• Nevada County

  California · FIPS 06057

  101,911 residents · 2025 estimate

• Orange County

  California · FIPS 06059

  3,149,507 residents · 2025 estimate

• Placer County

  California · FIPS 06061

  442,081 residents · 2025 estimate

• Plumas County

  California · FIPS 06063

  18,583 residents · 2025 estimate

• Riverside County

  California · FIPS 06065

  2,544,916 residents · 2025 estimate

• Sacramento County

  California · FIPS 06067

  1,618,460 residents · 2025 estimate

• San Benito County

  California · FIPS 06069

  70,082 residents · 2025 estimate

• San Bernardino County

  California · FIPS 06071

  2,224,091 residents · 2025 estimate

• San Diego County

  California · FIPS 06073

  3,282,248 residents · 2025 estimate

• San Francisco County

  California · FIPS 06075

  826,079 residents · 2025 estimate

• San Joaquin County

  California · FIPS 06077

  823,815 residents · 2025 estimate

• San Luis Obispo County

  California · FIPS 06079

  282,367 residents · 2025 estimate

• San Mateo County

  California · FIPS 06081

  743,568 residents · 2025 estimate

• Santa Barbara County

  California · FIPS 06083

  442,065 residents · 2025 estimate

• Santa Clara County

  California · FIPS 06085

  1,914,391 residents · 2025 estimate

• Santa Cruz County

  California · FIPS 06087

  258,852 residents · 2025 estimate

• Shasta County

  California · FIPS 06089

  181,648 residents · 2025 estimate

• Sierra County

  California · FIPS 06091

  3,098 residents · 2025 estimate

• Siskiyou County

  California · FIPS 06093

  42,013 residents · 2025 estimate

• Solano County

  California · FIPS 06095

  455,376 residents · 2025 estimate

• Sonoma County

  California · FIPS 06097

  486,444 residents · 2025 estimate

• Stanislaus County

  California · FIPS 06099

  557,719 residents · 2025 estimate

• Sutter County

  California · FIPS 06101

  98,787 residents · 2025 estimate

• Tehama County

  California · FIPS 06103

  64,665 residents · 2025 estimate

• Trinity County

  California · FIPS 06105

  15,720 residents · 2025 estimate

• Tulare County

  California · FIPS 06107

  485,146 residents · 2025 estimate

• Tuolumne County

  California · FIPS 06109

  53,160 residents · 2025 estimate

• Ventura County

  California · FIPS 06111

  830,851 residents · 2025 estimate

• Yolo County

  California · FIPS 06113

  224,410 residents · 2025 estimate

• Yuba County

  California · FIPS 06115

  88,691 residents · 2025 estimate

Use the county data

Use the county name and FIPS code to identify the correct jurisdiction before collecting parcel, assessor, recorder or court information. Compare this national reference with the separate property-data coverage directory.

National geographic coverage does not mean that parcel records or probate feeds are connected for every county.

Geography: 2025 U.S. Census Gazetteer. Population: Vintage 2025 estimates, July 1, 2025. County equivalents include parishes, boroughs, independent cities and planning regions. Puerto Rico population is not supplied by this population file.