Maps and Data

Adopted 2021 Supervisorial Districts

At the November 23, 2021, the Board of Supervisors adopted new supervisorial districts.  
View Adopted 2021 Supervisorial District Map (PDF).

Use the "Find My District" interactive map to see which supervisorial district you live in. 

Download Supervisorial District GIS Shapefile

County Prepared Maps

County Releases Five Draft Concept Maps for Consideration (October 12, 2021)
View Draft Concept Maps (PDF)
Ver propuestas de mapas (PDF)
查看地图提案 (PDF)

DistrctR Online Mapping Application and Submission Portal

DistrictR is an easy to use online application to allow users to draw communities of interest, propose district boundaries, and submit written testimony. All submissions submitted via DistrictR will be part of the public record and considered by the Board of Supervisors.   

View Maps in Districtr Online Mapping Portal
You can comment on the map or use the map as a template for your own districting plan.
Puede comentar en el mapa o usar el mapa como plantilla para su propio plan de distritación.
您可以对地图发表评论，或者使用该地图作为您自己的选区计划的模版。 

Draft Concept 1
Draft Concept 2
Draft Concept 3
Draft Concept 4
Draft Concept 5

Community Input Maps

• Submissions for District Plans and  Communities of Interest

2011 Board of Supervisors Map

View the 2011 Board of Supervisors Map (PDF)

California Redistricting Data

• California Statewide Database - Redistricting Data

Census Redistricting Data

• TIGER Shapefiles
• Redistricting Datasets: Includes Citizens Voting Age by Race and Ethnicity (2013-2017)
• California Department of Finance - Census 2020 Redistricting Data 
• Contra Costa County Demographics Webpage

Outreach Toolkit

• Redistricting Flyer (PDF)
• Redistricting Flyer 2 (PDF)
• Redistricting Flyer in Spanish (PDF)
• Redistricting Flyer 2 in Spanish (PDF)
• Redistricting Flyer in Chinese (PDF)
• Redistricting Flyer 2 in Chinese (PDF)
• Redistricting FAQ (PDF)
• Redistricting FAQ in Spanish (PDF)
• Redistricting FAQ in Chinese (PDF)

Other Redistricting Resources

These websites and application provide additional resources for map and data specialists. 

• Dave's Redistricting Application 2020 (DRA 2020)
  DRA 2020 is a free web app to create, view, analyze and share redistricting maps and includes a rich set of analytics, including measures of proportionality, competitiveness, minority representation, compactness and splitting. This is NOT the Contra Costa County online submissions portal.