The GIS team has developed an interactive map application for use on our web site.  The goal of serving maps via a web browser is to provide you with easier access to County data.  Please turn off your popup blocker when using our interactive map applications.

The Community Development Mapping Archives page provides a central location to find and view archived maps such as supervisorial districts, county zoning, bike routes, urban limit line and much more

The County provides free access to most of our GIS data via the internet.  Note that GIS or CAD software on your computer is required to use these files.  You must first register for an account before you can download data.  If you have already registered just click to login.

The Contra Costa, Bay Area Map will help you find Contra Costa's location in the San Francisco Bay Area.

The District & Supervisor Map identify your District Supervisor and determine if you live in unicorportated or incorporated Contra Costa

Your feedback allows us to better assist you and helps in our continuing effort to improve our web site. The GIS Team can be reached via email at: