Congressional Districts

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Congressional Districts

Author:

The Redistricting and Voting Rights Data Office (contact [email protected] or 301-763-4039)

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.

119th Congress

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 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.

Data Products

2020 Census 119th Congressional District Summary File - Expected Release December 2024

The 119th Congressional District Summary File (CD119) will contain data for congressional and state legislative districts compiled from the questions asked of all people and about every housing unit in the 2020 Census. Population items will include age, sex, race, Hispanic or Latino origin, household type, family type, relationship to householder, group quarters population, housing occupancy and housing tenure (whether a housing unit is owner-occupied or renter-occupied).

The file will contain subject content identical to that shown in the 2020 Census Demographic and Housing Characteristics File (DHC), which was released in May 2023, but only include geographies related to the 119th Congressional and the 2024 State Legislative Districts.

American Community Survey 1-Year and 5-Year Estimates Data

The American Community Survey (ACS) produces data for congressional districts (CDs) annually, as part of the 1-year and 5-year estimates data releases. ACS data for the 119th Congressional Districts will not be released until September 2025 (1-year estimates) and December 2025 (5-year estimates). These data will be available at data.census.gov. Currently data for the 118th Congressional Districts are available.

Geographic Products

Block Equivalency Files

These Block Equivalency Files (BEFs) are the whole 2020 Census tabulation block representations of the 119th Congressional District plans as submitted by the states to the U.S. Census Bureau. The .ZIP file contains a national block equivalency file and individual state files for the five states (Alabama, Georgia, Louisiana, New York, and North Carolina) that redrew their congressional district plans for the 119th Congress. The fields in these files should be imported as text to preserve leading zeros.

In instances where plans included split 2020 Census tabulation blocks, the Census Bureau requested that the state assign the whole block to one district for the purpose of tabulating data. These block equivalency files contain the whole block tabulation plan. The Census Bureau's maps and TIGER/Line shapefiles will depict the correct location of the boundary (splits tabulation blocks). A listing of those blocks split in the states' official plans is also provided.

Only one state--Colorado--split blocks in their 119th Congressional District plan. Colorado split one block, 080010096072000, between Congressional District 07 and Congressional District 08. The data for that census block will be tabulated to Congressional District 08. This is unchanged from Colorado's 118th Congressional District plan.

TIGER/Line Shapefiles and Geodatabases

TIGER/Line products that include the 119th Congressional Districts, the 2024 State Legislative Districts, and other geography effective as of January 1, 2024 will be released in the Fall of 2024. The congressional and state legislative district boundaries are the boundaries as submitted by the state liaisons in Phase 4 of the Redistricting Data Program.

If the boundary of a congressional or state legislative district splits a 2020 Census tabulation block, the Census Bureau's annual TIGER/Line products will depict the correct location (showing the block split) of the boundary.

The shapefiles for the 119th Congressional and 2024 State Legislative Districts will be identified by their abbreviation within the file name: "cd119" for the 119th congressional districts; "sldu" for the state legislative districts - upper house; and "sldl" for the state legislative districts - lower house.

Congressional District Maps

The congressional district map suite includes three map types (national, state-based, and congressional district-based) that depict the congressional districts in effect for the 119th Congress of the United States (January 2025-2027). These maps are scheduled to be released on a flow beginning in early 2025.

Congressional District Relationship Files

The 119th Congressional District Relationship Files provide simple relationships between the 119th Congressional Districts and other 2020 Census tabulation geography including American Indian areas, counties, county subdivisions, census tracts, places, school districts, urban/rural population and land area, and ZIP Code Tabulation Areas. These files are scheduled to be released in early 2025.