Voting guide
How do I find my congressional district?
Short answer
Your congressional district is determined by your residential address. Enter your address into a district lookup or your state election authority's voter tool to see your current district number. It may differ from your last election if your state redrew its maps — redistricting happens after each census and, in some states, more often than that.
How districts are drawn
The U.S. House has 435 seats, apportioned among the states by population after each decennial census. Each state then draws district boundaries containing roughly equal populations — currently around 760,000 people per district.
Who draws the lines varies. In most states the legislature does, sometimes subject to a governor's veto. A number of states use independent or bipartisan commissions instead. Court challenges can force mid-decade redraws, which is why a district number can change even in a year with no census.
Why your district may have changed
If your district number is different from what you remember, the most likely explanations are a post-census redraw, a court-ordered map change, or a move on your part.
A changed district can mean a different incumbent, a different set of candidates, and a different set of local issues in the race — even though nothing about your address changed.
State legislative districts are separate
Your congressional district is not the same as your state senate or state house district. These are drawn independently and are much smaller. You will usually have one of each, and all three appear separately on your ballot.
State legislative districts are where individual votes carry the most weight — some state house districts contain fewer than 40,000 people.
Related questions
How many people does one U.S. House member represent?
Roughly 760,000 people, based on the 2020 census and the current apportionment of 435 seats. Six states and the District of Columbia have small enough populations that they have only one representative or none.
Can my district change without me moving?
Yes. Redistricting redraws boundaries around existing addresses. A court ruling or a legislative redraw can move your home into a different district between elections.
Sources
3 sources
Every source links to the original. Tiers follow our source hierarchy.
- T2Congressional apportionment
U.S. Census Bureau · Government record
- T2TIGER/Line boundary files
U.S. Census Bureau · Government record
- T2The House explained
U.S. House of Representatives · Government record
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Last reviewed September 3, 2026. Election rules vary by state and change — always confirm specifics with your state election authority.