Maps & GIS

Interactive Maps
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.

Data Download
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.

Contra Costa, Bay Area Map
TheContra Costa, Bay Area Map will help you find Contra Costa's location in the San Francisco Bay Area.
District & Supervisor Map
The District and Supervisor Map identify your District Supervisor and determine if you live in unicorportated or incorporated Contra Costa

Contact Us
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.