Three states (Colorado, Minnesota, and Pennsylvania) delineated new boundaries for the 2018 election cycle. All other states, the District of Columbia, and Puerto Rico had no changes to their congressional district boundaries from the 2016 cycle.

The 116th Congressional District Summary File contains the data compiled from the questions asked of all people and about every housing unit in the 2010 Census. Population items include age, sex, race, Hispanic or Latino origin, household relationship, household type, household size, family type, family size, and group quarters. Housing items include occupancy status, vacancy status, and tenure (whether a housing unit is owner-occupied or renter-occupied). 

The files contain subject content identical to that shown in the 2010 Census Summary File 1 (SF 1), with the exclusion of those tables originally produced at the tract level or above (PCT, HCT, PCO tables). This change was necessary to ensure that these data tables comply with the U.S. Census Bureau’s updated disclosure avoidance policies.

The file provides population and housing characteristics for the total population, population totals for the major race and Hispanic or Latino groups, and population and housing characteristics repeated by the major race and Hispanic or Latino groups. These data are also available at data.census.gov.

These Block Equivalency Files (BEFs) are the whole 2010 Census tabulation block representations of the 116th 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 those states--Colorado, Minnesota, and Pennsylvania--who reported changes during this collection cycle. The fields in these files should be imported as text to preserve leading zeros.

In instances where plans included split 2010 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). A listing of those blocks split in the states' official plans, and which district the population of these blocks is tabulated to, is also provided.

Only two state--Kentucky and Minnesota--split blocks in their 116th Congressional District plans. Kentucky did not have changes from their 113th Congressional District plan so these block splits carry over. The state of Minnesota provided splits in their 115th and 116th Congressional District plan. None of the Minnesota block splits changed population allocations as they were cosmetic in nature.

The 2018 – 2022 TIGER/Line products include the 116th Congressional Districts. The congressional district boundaries are the boundaries as submitted by the state liaisons in Phase 4 of the Redistricting Data Program.

The shapefiles for the congressional and state legislative districts are identified by their abbreviation within the file name: "cd116" for the 116th congressional districts; "sldu" for the state legislative districts - upper house; and "sldl" for the state legislative districts - lower house.

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 116th Congress of the United States (January 2019-2021). 

The 116th Congressional District Relationship Files provide simple relationships between the 116th Congressional Districts and other 2010 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.