"The nonpartisan Redistricting Data Hub provides individuals, good government organizations, and community groups the data, resources, and knowledge to participate effectively in the redistricting process.
In service of this mission, we host over 12,000 datasets in all 50 states, from the census block to the district level, and continue to add new data that is useful for nonpartisan map drawing and analysis. This data is free to the public, and accompanied by technical support and nonpartisan analysis on request."