Contra Costa County GIS Portal

Search for Contra Costa County CA GIS maps. A GIS map search can provide information like county maps, town maps, city maps, local maps, property maps, parcel maps, plat maps, public property, property tax assessments, flood zones, zoning boundaries, geographic information, historical maps, and property tax information.


Contra Costa County Assessor Offices are charged with determining the value of taxable property in their county or local area in order to calculate Contra Costa County property taxes. In addition to property values, Assessors maintain detailed county and local maps, including Geographic Information Science (GIS) maps. These Contra Costa County GIS maps can show public property, parks, property divisions, and roads, as well as property assessments and property taxes in Contra Costa County California. These maps can also include place names, bodies of water, flood zones, property zones, and other geographic information. Some Assessors may keep historic GIS maps that include historic property tax assessments. These maps may be available on the Contra Costa County Assessor Office website.

Contra Costa County Assessor's Office Martinez CA 2530 Arnold Drive 94553 925-313-7500


Contra Costa County Clerk Offices maintain public records for a county or local government, which includes GIS maps. These maps provide detailed information on the area, including Contra Costa County property maps that show boundaries, public property, property divisions, and in some cases, population information in Contra Costa County California. They may also include property value assessments and property tax rates. Contra Costa County GIS maps can show place names, bodies of water, zoning information, flood zones, and other geographic information. Clerks may also have historic GIS maps from the USGS or other organizations, and these maps are often available online through the Clerk Office website.

Antioch City Clerk Antioch CA 200 H Street 94509 925-779-7007

Brentwood Clerk Brentwood CA 708 3rd Street 94513 925-516-5440

Contra Costa Clerk Richmond CA 100 South 37th Street 94804 510-374-3241

Contra Costa County Clerk Martinez CA 555 Escobar Street 94553 925-335-7800

Hercules City Clerk Hercules CA 111 Civic Drive 94547 510-799-8215

Oakley City Clerk Oakley CA 3231 Main Street 94561 925-625-7000

Pinole City Clerk Pinole CA 2131 Pear St 94564 510-724-8928

Pleasant Hill City Clerk Pleasant Hill CA 100 Gregory Lane 94523 925-671-5237

Richmond City Clerk Richmond CA 450 Civic Center Plaza 94804 510-620-6513

San Pablo City Clerk San Pablo CA 1 Alvarado Street 94806 510-215-3005


Contra Costa County Town and City Halls provide municipal services for their town or city, including preserving vital records and maintaining records on their jurisdiction such as Contra Costa County GIS maps. The GIS maps at a Contra Costa County Town or City Hall can include property boundaries, public property, unclaimed parcels, and roads, as well as appraisal values for properties and property tax assessments in Contra Costa County California. These GIS maps may also show population information, place names, zoning boundaries, bodies of water, flood zones, and other geographic information. Some Town and City Halls also have historical maps of their area. These maps are often available to the public on the Contra Costa County Town and City Hall website.

Antioch City Hall Antioch CA 200 H Street 94509 925-779-7011

Clayton City Hall Clayton CA 6000 Heritage Trail 94517 925-673-7300

Concord City Hall Concord CA 1950 Parkside Drive 94519 925-671-3425

El Cerrito City Hall El Cerrito CA 10890 San Pablo Ave 94530 510-215-4300

Hercules City Hall Hercules CA 111 Civic Drive 94547 510-799-8200

Lafayette City Hall Lafayette CA 3675 Mount Diablo Boulevard 94549 925-284-1968

Martinez City Hall Martinez CA 525 Henrietta St 94553 925-372-3500

Oakley City Hall Oakley CA 3231 Main Street 94561 925-625-7017

Orinda City Hall Orinda CA 22 Orinda Way 94563 925-253-4220

Pinole City Hall Pinole CA 2131 Pear Street 94564 510-724-8928

Pleasant Hill City Hall Pleasant Hill CA 100 Gregory Ln 94523 925-671-5270

Richmond City Hall Richmond CA 450 Civic Center Plaza 94804 510-620-6513

San Pablo City Hall San Pablo CA 13831 San Pablo Avenue 94806 510-215-3000

Walnut Creek City Hall Walnut Creek CA 1666 North Main Street 94596 925-943-5800


Contra Costa County Recorders of Deeds keep real estate records to ensure the accuracy of property and land records. In addition to deeds, Recorders of Deeds also have detailed county and local maps, including Contra Costa County GIS maps that show property lines, building information, public property, unclaimed parcels, as well as property value assessments and property tax information. These GIS maps may also include place names, zoning boundaries, bodies of water, flood zones, and other geographic information in Contra Costa County California. The Recorder of Deeds may also have historic GIS maps. These maps are often available on the Contra Costa County Recorder of Deeds website.

The County Clerk Recorder’s Office Martinez CA 555 Escobar Street 94553 925-335-7900