Fighting gerrymandering, one precinct at a time.

Update   November 2020: Pennsylvania

Update   July 2020: Iowa

Update   July 2020: Illinois

We're building a complete, legislative-quality database of electoral precinct data for the entire nation, and we need your help.


We're gathering raw precinct data in all formats from all 50 states, Washington DC, and Puerto Rico.

Cleaning & Validating

We then employ a rigorous process to make sure our data is top quality, aligned to census data and election results.


All of the data we collect and clean will be available for the public to use to analyze districts and build better redistricting tools.

Current Progress