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Draw a Map for 2021 Redistricting Project

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County District mapRedistricting is different from most issues that come up in County government. Instead of being limited to saying you support or oppose a County-prepared ordinance or resolution, you can draw a map yourself!

There are different tools for different purposes, and different tools for different levels of technical skill and interest.

What do the existing supervisorial districts look like

All Supervisorial Districts Map (PDF: 8.7MB)

Demographic Summary of Existing Districts

Communities of Interest Testimony

Mapping Tools Overview

How to Submit your Map

Maps should be submitted to After you submit your map, the demographic consultants will generate the population and other demographic details for your proposed map. Maps can be viewed on the Draft Maps page.

It is helpful if you submit written comments with your map describing how your map was drawn to meet the required criteria. An example of this would be describing the specific neighborhoods or communities of interest that are kept within a single district.

Once the Advisory Redistricting Commission and Board of Supervisors have gone through the process to hear your thoughts and see your drawn maps, they will post drafted maps here for your consideration.

Important: Please share your feedback on draft maps at any of the upcoming public meetings on redistricting or submit written feedback to

Tools for Drawing Maps

A variety of map-drawing tools are available:

  1. Paper-only maps
  2. Paper maps with a Microsoft Excel spreadsheet to calculate population totals
  3. DistrictR a simple online map drawing tool to easily draw neighborhoods or communities of interest.
  4. Caliper’s Maptitude Online Redistricting mapping tool to draw maps census block by census block and submit maps electronically.
  5. Interactive Review Map to review, analyze, and compare maps, not to create them. Zoom in and out on map boundaries, view population counts/ID#s, and view draft maps (once the draft maps are released). Similar to Google Maps in ease of use.
  6. Story Map is an easy to use “story” of demographic and other data to learn about your community and identify “communities of interest.” Story Map is similar to PowerPoint but interactive. Story Map is to review and analyze data, not to create maps.