A complete reference of every voting Congressional district based on the 2020 census reapportionment (118th Congress and forward), plus the DC delegate and the five non-voting delegates representing US territories. Each row identifies the state, district number (or 0 for at-large), total seats in the state, whether the seat is at-large, and whether the seat votes on House legislation.
Pro tip: Seven states have only one at-large district: Alaska, Delaware, North Dakota, South Dakota, Vermont, Wyoming, and (since the 2020 census) not Montana — which gained a second seat. Use the is_at_large column to filter cleanly.
Select which columns to include in your download.
About the US Congressional Districts Dataset
The US House of Representatives has 435 voting seats apportioned among the 50 states by population, plus six non-voting delegates: one for the District of Columbia, and one each for Puerto Rico, Guam, the US Virgin Islands, American Samoa, and the Northern Mariana Islands. The non-voting delegates participate in committee work and floor debate but cannot vote on final passage of legislation. District boundaries are redrawn after each decennial census.
Common Use Cases
Political-tech tooling (voter targeting, donor outreach, GOTV), journalism and election coverage, civic-engagement apps, government-affairs dashboards, redistricting analysis, election-night county-by-county results displays, and political donation compliance systems.
Column Reference
- state, state_abbr — state or territory name and two-letter USPS code.
- district_number — district number (1-N), or 0 for at-large seats.
- seats_in_state — total seats apportioned to this state.
- is_at_large — Yes if the state has only one seat.
- is_voting — Yes if the seat votes on House legislation (No for DC and the five territorial delegates).
Apportionment Changes from the 2020 Census
Six states gained seats (Texas +2, Florida, North Carolina, Colorado, Montana, Oregon each +1) and seven lost seats (California, Illinois, Michigan, New York, Ohio, Pennsylvania, West Virginia each -1) compared to the 2010 apportionment. Montanas gain returned it to two seats for the first time since 1993.
Mid-Decade Redistricting
State legislatures generally redraw district maps once after each decennial census, but a few states (Texas, New York, Ohio, North Carolina) have engaged in mid-decade redraws in response to court orders. District boundaries can shift even if the district number does not, so this dataset captures the seat structure rather than the boundary lines (which are GIS shapefiles, not row data).
