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California · find a service

Find your supervisor district in California

Find reviewed official supervisor-district lookup guidance, maps and referrals, with their actual scope and limitations.

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In California, 59 county departments publish 63 official links for this service. Reviewed requirements cover availability notices (35). 57 counties have a page for it below.

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59 guides with reviewed service links · Reviewed local guides

Choose a county on the map

Highlighted counties have a reviewed service guide matching this selection. An agency may serve only a city or part of a county.

California58 counties
California county mapChoose a county to open its directory. Use the county search and list for smaller counties.Alameda County: open directoryAlpine County: open directoryAmador County: open directoryButte County: open directoryCalaveras County: open directoryColusa County: open directoryContra Costa County: open directoryDel Norte County: open directoryEl Dorado County: open directoryFresno County: open directoryGlenn County: open directoryHumboldt County: open directoryImperial County: open directoryInyo County: open directoryKern County: open directoryKings County: open directoryLake County: open directoryLassen County: open directoryLos Angeles County: open directoryMadera County: open directoryMarin County: open directoryMariposa County: open directoryMendocino County: open directoryMerced County: open directoryModoc County: open directoryMono County: open directoryMonterey County: open directoryNapa County: open directoryNevada County: open directoryOrange County: open directoryPlacer County: open directoryPlumas County: open directoryRiverside County: open directorySacramento County: open directorySan Benito County: open directorySan Bernardino County: open directorySan Diego County: open directorySan Francisco County: open directorySan Joaquin County: open directorySan Luis Obispo County: open directorySan Mateo County: open directorySanta Barbara County: open directorySanta Clara County: open directorySanta Cruz County: open directoryShasta County: open directorySierra County: open directorySiskiyou County: open directorySolano County: open directorySonoma County: open directoryStanislaus County: open directorySutter County: open directoryTehama County: open directoryTrinity County: open directoryTulare County: open directoryTuolumne County: open directoryVentura County: open directoryYolo County: open directoryYuba County: open directory
County directory Reviewed service guides available
Map for browsing; agency service areas may differ.
Map source

U.S. Census boundaries via U.S. Atlas · 2017 edition, simplified for display.

Showing 59 guides as a short list. Choose your county or type a city above to see each guide’s instructions, conditions and sources here.

County government · Calaveras

Calaveras County Board of Supervisors

Supervisor district lookup and map guidance

Official supervisor district lookup and map guidance (opens in a new tab)
Published supervisor district guidance; no address or parcel query was performed

The new Supervisorial Districts were created using United States Census Blocks and are legally described as such in the ordinance adopting them. Census blocks were not created using the County’s parcel layer. This may cause interpretation in certain areas to be difficult. Staff continues to make necessary adjustments in County systems and may make adjustments to this map as necessary to match the Census Block boundaries to the County’s data. This work is expected to take several months to complete. If after reviewing this map you still have questions regarding which Supervisorial District you reside in, please contact Information Technology, GIS Division at (209) 754-6608.

Official information checked October 26, 2026 · Details & sources

Full guide, contact details & sources →
County government · Contra Costa

Contra Costa County Board of Supervisors

Supervisor district lookup and map guidance

Official supervisor district lookup and map guidance (opens in a new tab)
Published supervisor district guidance; no address or parcel query was performed

Below is an interactive map of Contra Costa County showing the elected officials for each of its five Supervisorial Districts. Click on the plus (+) sign to zoom in and click and drag to look around the map. You can enter your address and city in the Search bar on the top right of the map below to find the County Supervisor who represents you. The contact information for each Supervisor will appear to the left of the map. If you zoom in, only the information for the Supervisor(s) of the currently visible District(s) will appear.

Official information checked October 26, 2026 · Details & sources

Full guide, contact details & sources →
County government · El Dorado

El Dorado County Board of Supervisors

Supervisor district lookup and map guidance

Official supervisor district lookup and map guidance (opens in a new tab)
Published supervisor district guidance; no address or parcel query was performed

Supervisorial District Maps are located online and are available in the Board of Supervisor's office at 330 Fair Lane, Placerville, CA 95667. If you are unable to verify which district you are in, you may call the office of the Clerk of the Board at (530) 621-5390. We will need your street address to determine which Supervisorial District you reside in.

Official information checked October 26, 2026 · Details & sources

Full guide, contact details & sources →
County government · Inyo

Inyo County Board of Supervisors

Supervisor district lookup and map guidance

Official supervisor district lookup and map guidance (opens in a new tab)
Published supervisor district guidance; no address or parcel query was performed

Use the map below to find which district you're located in and to access the contact information of your district's Supervisor.

Official information checked October 26, 2026 · Details & sources

Published supervisor district guidance; no address or parcel query was performed

1. Click on one of the Supervisors to zoom in on their district.

Official information checked October 26, 2026 · Details & sources

Full guide, contact details & sources →
County government · Lake

Lake County Board of Supervisors

Supervisor district lookup and map guidance

Official supervisor district lookup and map guidance (opens in a new tab)
Published supervisor district guidance; no address or parcel query was performed

Welcome to the County of Lake Board of Supervisors Page. If you are unsure which District you live in, visit our Supervisorial Districts page, and enter your home address in the search bar at the upper right.

Official information checked October 26, 2026 · Details & sources

Full guide, contact details & sources →
County government · Marin

Marin County Board of Supervisors

Supervisor district lookup and map guidance

Official supervisor district lookup and map guidance (opens in a new tab)
Published supervisor district guidance; no address or parcel query was performed

Interactive Map Explore our interactive map to see the boundaries of the district you live in. [External]

Official information checked October 26, 2026 · Details & sources

Published supervisor district guidance; no address or parcel query was performed

Lookup Tool Enter your address or parcel number in our lookup tool to find your district.

Official information checked October 26, 2026 · Details & sources

Full guide, contact details & sources →
County government · Mariposa

Mariposa County Board of Supervisors

Supervisor district lookup and map guidance

Official district-identification assistance (opens in a new tab)
Published district-identification phone assistance only; no phone call, meeting action or person/address query was performed

call the Registrar of Voters at (209) 966-2207; or call the Clerk of the Board of Supervisors office at (209) 966-3222 for assistance.

Official information checked October 26, 2026 · Details & sources

Full guide, contact details & sources →
County government · Merced

Merced County Board of Supervisors

Supervisor district lookup and map guidance

Official supervisor district lookup and map guidance (opens in a new tab)
Published supervisor district guidance; no address or parcel query was performed

Meet the Board of Supervisors members and find your Supervisor using the Merced County Elected Officials Mapping Tool.

Official information checked October 26, 2026 · Details & sources

Published supervisor district guidance; no address or parcel query was performed

Conozca a los supervisores y encuentre su Supervisor usando el Condado de Merced Instrumento del Oficiales Electos.

Official information checked October 26, 2026 · Details & sources

Full guide, contact details & sources →
County government · Nevada

Nevada County Information Systems — Geographic Information Systems

Supervisor district lookup and map guidance

Official supervisor district lookup guidance (opens in a new tab)
GIS-published interactive lookup purpose; no historical PDF currency, result accuracy or service availability is inferred

View maps of Supervisorial Districts in the county. To identify the supervisor for a specific location, use the interactive web map below to enter your address in the search bar, or click on any feature in the map to open a pop-up window with more information.

Official information checked October 26, 2026 · Details & sources

Full guide, contact details & sources →
County government · Sacramento

Sacramento County Board of Supervisors

Supervisor district lookup and map guidance

Official supervisor district lookup and map guidance (opens in a new tab)
Published supervisor district guidance; no address or parcel query was performed

Would you like to know​ which member of the Board of Supervisors represents you?

Official information checked October 26, 2026 · Details & sources

Published supervisor district guidance; no address or parcel query was performed

Please enter your ​street number and street name and you'll be directed to the website for your County Supervisor:

Official information checked October 26, 2026 · Details & sources

Full guide, contact details & sources →
County government · San Luis Obispo

San Luis Obispo County Board of Supervisors

Supervisor district lookup and map guidance

Find My Supervisor — official lookup guidance (opens in a new tab)
Official dedicated service purpose only; not a result for any address, legal boundary import or claim that old redistricting maps are current

This service finds your Supervisor and Supervisor District by entering a valid Address, City, and Zip Code.

Official information checked October 26, 2026 · Details & sources

Full guide, contact details & sources →
County government · San Mateo

San Mateo County Board of Supervisors

Supervisor district lookup and map guidance

Board’s official district map resource (opens in a new tab)
Official LAFCO referral to the Board district resource only; other profile figures, meeting information and county-outline imagery are outside this review

The San Mateo County Board of Supervisors is composed of five members elected to four-year terms by the public in their respective districts (see FIND YOUR DISTRICT on the Board of Supervisors website).

Official information checked October 26, 2026 · Details & sources

Full guide, contact details & sources →
County government · Santa Clara

Santa Clara County Board of Supervisors

Supervisor district lookup and map guidance

Official supervisor district lookup and map guidance (opens in a new tab)
Published supervisor district guidance; no address or parcel query was performed

Click next to the magnifying glass to enter your address (EX: 1234 Main St, Anytown US) in the search box below to find out who is your district supervisor. A full-screen map is also available.

Official information checked October 26, 2026 · Details & sources

Full guide, contact details & sources →
County government · Santa Cruz

Santa Cruz County Board of Supervisors

Supervisor district lookup and map guidance

Official supervisor district lookup and map guidance (opens in a new tab)
Published supervisor district guidance; no address or parcel query was performed

Click the map above to learn more about your Supervisor and district. Click here if you aren't sure which Supervisor represents you.

Official information checked October 26, 2026 · Details & sources

Full guide, contact details & sources →
County government · Sonoma

Sonoma County Board of Supervisors

Supervisor district lookup and map guidance

Official supervisor district lookup and map guidance (opens in a new tab)
Published supervisor district guidance; no address or parcel query was performed

There are two options to find the Supervisorial District for an address:

Official information checked October 26, 2026 · Details & sources

Published supervisor district guidance; no address or parcel query was performed

Enter the address in the Online District Lookup below.

Official information checked October 26, 2026 · Details & sources

Full guide, contact details & sources →

Find your supervisor district by county