In Pennsylvania, Congressional redistricting is controlled by the state legislature, while a five-member politician-appointed commission draws state legislative lines. When partisan politicians control the mapmaking process, we’re especially vulnerable to gerrymandering — which is why it’s so important we push our lawmakers to be transparent and consider public testimony every step of the way.


Pennsylvania State Legislative and Senate Districts

 The majority and minority leaders of the PA House and Senate each appoint two members to the Legislative Reapportionment Commission. These four members then have 45 days to vote on a fifth member to be the chair. If they can’t agree in this time, the PA Supreme Court appoints the chair instead. 

The maps drawn by the LRC are not subject to approval from either the state legislature or the governor. Instead, the Commission has full control over the mapping process. Any challenges to the map must be brought within 30 days to the Pennsylvania Supreme Court.  


Congressional Districts

In The Congressional Redistricting Process, the U.S. Census population data is used to determine how many seats each state gets in the U.S. House of Representative. Once our legislators know how many Congressional districts we will have, they redraw district lines to make sure those districts are as equal in population as possible. 

They then pass these maps as a bill — it must be approved by the PA House and Senate before going to the governor’s desk, where the governor can approve or veto.


Mapping Criteria

Both legislative and congressional districts must comply with the provisions of the US Constitution and Voting Rights Act and keep districts reasonably equal in population.  In addition:  

Mandatory Criteria:   

Congressional districts comply with the provisions of the US Constitution and Voting Rights Act and keep districts reasonably equal in population.  

Legislative Districts must  

  • Be Compact 
  • Be Contiguous 
  • Not split counties or municipalities unless necessary 

Other Important Criteria:  

  • Keeping communities of interest whole 
  • Competitiveness  
  • Avoiding drawing districts for the benefit or detriment of incumbents, declared candidates, or political parties 
  • Prohibition on drawing districts with the intent or effect of denial/abridgement of voting rights or vote dilution because of race or membership in a language minority group. 

Why Redistricting Matters for Pennsylvania

When done fairly, redistricting is a chance for political power to be equitably distributed across different communities, making sure everyone has a seat at the table.

Unfortunately, redistricting has historically been conducted behind closed doors with little to no public input, meaning they don’t have an accurate picture of what our communities look like.

Even worse, when‌ ‌politicians‌ ‌have‌ ‌the‌ ‌power‌ ‌to‌ ‌draw‌ ‌electoral‌ ‌maps,‌ ‌they‌ ‌manipulate‌ ‌district‌ ‌lines‌ ‌to‌ ‌divide‌ or‌ ‌pack‌ ‌together‌ ‌certain‌ ‌populations,‌ ‌keeping‌ ‌themselves‌ ‌and‌ ‌their‌ ‌party‌ ‌in‌ ‌power.‌‌ ‌It’s‌ ‌called‌ ‌gerrymandering‌ ‌–‌ ‌and‌ ‌it’s‌ ‌a‌ ‌major‌ ‌threat‌ ‌to‌ ‌our‌ ‌democracy.

Key Dates For Pennsylvania 2021 Redistricting

Hearings are held across Pennsylvania from May through September to take testimony from communities of interest. When the legislature receives the federal Census data, they use it in combination with public input to create draft maps.

From October through December, the legislature processes the data, displays draft maps, and holds hearings to get public feedback to revise the maps. After that, the Congressional draft maps are finalized, voted on by the state legislature, and sent to the Governor’s desk, who can veto or approve.

The first round of hearings in Pennsylvania has already passed! As we enter the next phase of redistricting, hearing dates will be posted at the state website, To give in-person testimony at an upcoming hearing, please email



Key Dates

  • Raw Redistricting Data 08/15/2021
  • Redistricting Data 09/30/2021
  • State Maps Due 12/29/2021
  • Candidate Filing 03/08/2022
  • Primary Election 05/17/2022

Pennsylvania Redistricting Resources

Use these resources to learn more about how you can get involved in fighting for fair districts and stopping gerrymandering in Pennsylvania.