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.
Organizations give groups of concerned citizens, nonprofits, or redistricting commissions the tools to create their own community on DistrictBuilder and engage the public in the redistricting process. It’s a place to map collaboratively, highlight the group’s goals, showcase maps that the community has created, or display official proposed maps.
Explore questions of proportionality, competitiveness, contiguity, and more, as new legal decisions, public oversight, and technology change the criteria for drawing electoral districts.
We walk through the tools and metrics available in DistrictBuilder to evaluate your map
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