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Send a question to the help desk about redistricting data or the redistricting process in your state. They can also help you get your account set up so you can download data

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Case Studies

Helping people understand their districts by providing data to analyze redistricting plans

With the Help Desk’s assistance, Spotlight PA, a nonpartisan investigative journalism publication, created a tool that enables Pennsylvania residents to easily look up information about their old and new districts.

Joining Election Results with Precinct Boundaries to Analyze Proposed Redistricting Plans

The organization Maine Voices Network wanted to support other groups who were presenting a congressional map as a legally compliant alternative to the Maine state legislature’s proposed plan.

Helping Civil Rights Organizations Create a Dataset for Racially Polarized Voting (RPV) Analyses

A member of a civil rights organization contacted the Redistricting Data Hub Help Desk with a question about our data. They had local election results at the district level that they wanted to merge with citizen voting age population (CVAP) data by race.


If you need help using our data to draw District and Community of Interest maps we have resources to support you.

Frequently Asked Questions

Find the answers to your questions about our data, redistricting knowledge and tools


Watch recordings that cover: Prison Gerrymandering, Community of Interest (COI), Racially Polarized Voting, Redistricting Data, Redistricting Process, and mapping tools.

Mapping Tools

Compare mapping tools and find the one that is best for you, learn how to import and export maps across tools, and find out which tools are used by different states.


Read articles and watch tutorials about the redistricting process

Redistricting Basics

Answers to fundamental questions about the redistricting process and how to draw and analyze maps: what is redistricting, what is gerrymandering, how to draw legally compliant maps, what data you need, why do we redistrict, when redistricting occurs and who is responsible for redistricting.

Local Redistricting

Any legislative body in which members are elected within districts must redraw these boundaries on occasion. That includes not only the US House of Representatives (congressional redistricting) and state legislatures, but also county and city legislative bodies, school districts, judicial districts and more.

Community of Interest

A community of interest COI is a group of people with shared concerns, interests, and characteristics. Every COI is unique; they might be formed around neighborhoods or the physical landscape, cultures, values, and many other things. Because of these shared interests and concerns, a common redistricting criteria is that COIs be considered during the process.

Racially Polarized Voting (RPV)

Racially Polarized Voting (RPV) analyses are done to determine compliance with the Voting Rights Act (VRA). The VRA was passed in 1965 with the intent to enforce the 15th Amendment. Section 2 of the Voting Rights Act protects against voting practices or procedures that inhibit the right to vote based on race, color, or membership in a language minority group.

Prison Gerrymandering

Prison gerrymandering is the practice of distorting representation by counting incarcerated people in the jail or prison where they are confined, rather than at their place of residence. Since the vast majority of incarcerated people cannot choose which facility to be confined at and are denied the right to vote, where they are counted impacts the representation of the communities to which they belong and in which they are confined.

Florida 2012 Redistricting

A primer on the first case in which a state court struck down a redistricting plan as a partisan gerrymander.

In 2010, the citizens of Florida rallied behind two proposed amendments to the state’s constitution, written by Ellen Freidin of Fair Districts Florida. With over 63% of the vote, Floridians codified the “Fair Districts Amendments,” which put in place two tiers of standards regulating how the Legislature could redistrict for both state legislative and congressional reapportionment.

Frequently Asked Questions



Our help desk team has made videos walking you through important ways to engage with our data and our tools

Choose Your Own Mapping Tool Feature

The Choose Your Own Mapping Tool uses a table to organize information about mapping tools that are used in the Redistricting process to draw Community of Interest or District Maps. In this demonstration, Kate shows you how to use the Airtable feature to get the most out of the information our team has collected.

How to download multiple datasets using our API

The Redistricting Data Hub’s Application Programming Interface (API) can be used to download multiple redistricting datasets at once. In this demonstration, Peter shows you how to use the API from the beginning.

How to sign up for an account and download data

The Redistricting Data Hub’s website has redistricting data ready for download once you register for a free account. In this demonstration, Jose shows you how to get started by signing up for an account and downloading your first dataset.

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