DistrictBuilder is a free and open source redistricting tool.Try it out
DistrictBuilder’s software gives you access to the same block-level data used in legal redistricting plans — for free. Come to the table with electoral maps that better reflect local communities and lead to fair representation.
Public engagement in the redistricting process is key to creating fair districts. With DistrictBuilder Organizations, your redistricting commission, agency, or community group can collect maps and input from the public for redistricting.
Fight for fair and transparent redistricting. DistrictBuilder empowers you to draw a better map.Try it out
Explore questions of proportionality, competitiveness, contiguity, and more, as new legal decisions, public oversight, and technology change the criteria for drawing electoral districts.
We calculated which congressional districts have become over or underpopulated since they were last drawn.
Not sure where to begin? DistrictBuilder’s wiki has all the information you need to build your first map.
Want to learn more about Public Mapping? The Public Mapping Project book shares lessons learned, the tech, and how to DIY redistricting.
Build the map that demands fair representationStart now