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State Legislative Districts

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The tabs below represent the state legislative years associated with the state legislative districts collected by the U.S. Census Bureau through the Redistricting Data Program. The boundaries in effect for a specific legislative year are those boundaries in effect for that year’s election. Boundary updates are collected every two years, and typically, new products are generated only for state legislative districts with changes. 

State legislative districts are generally included as part of the standard set of geographies for which decennial census and American Community Survey (ACS) 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.


  • 2022
  • 2020
  • 2018
  • 2016
  • 2014
  • 2012
  • 2000

Following the post-2020 Census redistricting process, the Census Bureau collected state legislative district boundaires from all states. These were the boundaries in effect for the 2022 election cycle.

Data Products

American Community Survey Data Profiles

These data profiles contain social, economic, housing and demographic statistics for the 2022 State Legislative Districts from the 2017 - 2021 American Community Survey (ACS) 5-year estimates. The four data profiles are available through a web-based lookup tool on the ACS website and on the Census Bureau's FTP site. 

118th Congressional District Summary File - Planned Release in August 2023

The 118th Congressional District Summary File will contain the data 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 is planned for release in May 2023, but only include geographies related to the 118th Congressional and the 2022 State Legislative Districts. 

Geographic Products

Block Equivalency Files

These Block Equivalency Files (BEFs) are the whole 2020 Census tabulation block representations of the 2022 State Legislative 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 all states, the District of Columbia, and Puerto Rico. 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 depict the correct location of the boundary (splits tabulation blocks), except for the January 2023 TIGER/Line shapefile release which does not depict the block splits.  A listing of those blocks split in the states' official plans is also provided.

Three states split blocks in their 2022 State Legislative District- Upper Chamber (SLDU) and State Legislative District- Lower Chamber (SLDL) plans: Colorado, Minnesota, and North Dakota. Additionally, Delaware split a block in their 2022 SLDU plan and Pennsylvania split a block in their 2022 SLDL plan.

TIGER/Line Shapefiles and Geodatabases

These 118th Congressional District TIGER/Line products include the 2022 State Legislative Districts, the 118th Congressional Districts, and the supporting 2020 Census geography. They also contain the urban areas defined as of December 29, 2022 and the new county-equivalent planning regions in Connecticut. 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 maps and TIGER/Line products will typically depict the correct location of the boundary. However, for the TIGER/Line products released in January 2023 only, the shapefiles will show the split block allocated in its entirety to the congressional or state legislative district specified to the U.S. Census Bureau by the state.

The shapefiles for the 118th Congressional and 2022 State Legislative Districts are identified by their abbreviation within the file name: "cd118" for the 118th congressional districts; "sldu" for the state legislative districts - upper house; and "sldl" for the state legislative districts - lower house.

State Legislative District Maps

The State Legislative District (SLD) Reference Maps display the boundaries, names, and/or codes of SLDs in effect for the 2022 election cycle. Two separate map types make up this series: one that displays State Legislative Districts – Upper Chamber (SLDUs) and one that displays the State Legislative Districts – Lower Chamber (SLDLs). Each of these maps shows the extent of the subject SLD, as well as the surrounding SLDs of the same type. 

Relationship Files

The 2022 State Legislative District Relationship Files provide simple relationships between 2022 State Legislative 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.

Related Information

Page Last Revised - March 1, 2023
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