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.  I want to remind everyone that for the week of 04/10/2017 the site will be up and down for upgrades.

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.  Click here to download.    

Bay Area Map

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

District and Supervisor Map

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

The new CCMAP has been launched, but is still under development Please use the "Web GIS" link on the left.  We are currently working hard to add updates.  
-Contra Costa County Base GIS Data Added
-Notification Tool updates
Please feel free to email us with any comments or concerns.