The tabs below represent the unique congressional sessions as collected by the U.S. Census Bureau through the Redistricting Data Program. Each tab contains information specific to that session's boundary collection along with other relevant products generated in support of any changes. Typically, new products are generated only when changes to congressional districts are reported between sessions. Any changes to congressional plans are submitted to the Census Bureau by non-partisan state liaisons, identified by the governor and legislative leadership of each state at the beginning of each decade's Redistricting Data Program. Once these plans are processed and inserted into the MAF/TIGER database, the Census Bureau generates verification materials for each state to review and certify as accurate. Any reported changes to the verification materials were incorporated into these final products.
Congressional districts are generally included as part of the standard set of geographies for which decennial census and American Community Survey (ACS) 1-Year and 5-Year estimates data are produced. These data are available on data.census.gov. Selected other data products produced specifically for congressional and state legislative districts are referenced in the relevant tabs below, and are also available from data.census.gov.
Following the post-2020 Census redistricting process, the Census Bureau collects congressional district boundaries from all states for each new Congress. The information on this page reflects the boundaries as submitted by the state assigned non-partisan liaisons in Phase 4 of the Redistricting Data Program, i.e. those in effect for the 2024 election cycle. Five states (Alabama, Georgia, Louisiana, New York, and North Carolina) delineated new boundaries for the 2024 election cycle. All other states, the District of Columbia, and Puerto Rico had no changes to their congressional district boundaries from the 2022 cycle.