The U.S. House of Representatives has 435 voting members. Six non-voting delegates also sit in the chamber, representing the District of Columbia and five U.S. territories, which brings the total number of representatives in the House to 441. The 435 voting seats are divided among the 50 states based on population, and every state is guaranteed at least one.
Why the Number Is Fixed at 435
Congress capped the House at 435 voting seats through the Permanent Apportionment Act of 1929, now codified at 2 U.S.C. ยง 2a.1Congressional Research Service. Size of the U.S. House of Representatives Before that law, the House grew after nearly every census to keep pace with population. By the early twentieth century, lawmakers concluded that an indefinitely expanding chamber would become unworkable and chose to redistribute the existing seats instead of adding more.
The statute itself does not literally say “435.” It directs the president to reapportion “the then existing number of Representatives,” which happened to be 435 when the law passed, and that language effectively locked the number in place.2Office of the Law Revision Counsel. 2 USC 2a – Reapportionment of Representatives Congress could raise or lower the cap by passing a new law, but no such effort has succeeded in nearly a century.
How the 435 Seats Are Divided Among the States
Article I, Section 2 of the Constitution requires a national population count every ten years.3Congress.gov. U.S. Constitution – Article I, Section 2 The Census Bureau runs that count, and the results determine how the 435 seats are split among the states. Once the numbers are final, the federal government applies a formula called the method of equal proportions, which aims to keep the number of people per representative roughly equal from state to state.4United States Census Bureau. How Apportionment is Calculated
The formula assigns “priority values” to potential seats for each state, calculated by multiplying the state’s population by a mathematical multiplier. Seats are then awarded one at a time in descending order of priority until all 435 are placed.5United States Census Bureau. Computing Apportionment Based on the 2020 census, the national average works out to about 761,169 people per congressional seat.6United States Census Bureau. Apportionment of Seats in the U.S. House of Representatives
Actual district populations vary because the Constitution guarantees every state at least one representative, no matter how small its population.3Congress.gov. U.S. Constitution – Article I, Section 2 Seven states currently hold only that single seat: Alaska, Delaware, North Dakota, South Dakota, Vermont, West Virginia, and Wyoming. In each of those states, the entire state functions as one at-large congressional district. The apportionment formula distributes the remaining 385 seats among the larger states after first awarding one to each of the 50.
What Changed After the 2020 Census
The 2020 reapportionment moved seven seats across state lines. Texas picked up two seats. Colorado, Florida, Montana, North Carolina, and Oregon each gained one. California, Illinois, Michigan, New York, Ohio, Pennsylvania, and West Virginia each lost a seat.7United States Census Bureau. Apportionment 2020 Table D Montana returned to two districts for the first time since 1993, when it had shrunk to a single at-large seat.
These shifts show the zero-sum arithmetic of a fixed 435-seat chamber. Every seat a growing state gains comes directly at the expense of a state whose population grew more slowly or shrank. The next reapportionment will follow the 2030 census.
The Six Non-Voting Members
Beyond the 435 voting representatives, the House seats six non-voting members who represent jurisdictions that are not states. Five delegates represent the District of Columbia, Guam, American Samoa, the U.S. Virgin Islands, and the Commonwealth of the Northern Mariana Islands. A sixth member, the Resident Commissioner, represents Puerto Rico and serves a four-year term rather than the standard two.8Congressional Research Service. Delegates to the U.S. Congress: History and Current Status
These members hold more power than the label suggests. They can introduce legislation, question witnesses, serve on standing committees, and vote in committee just like any other member. They participate in floor debates, raise points of order, and manage debate time. What they cannot do is vote on final passage of legislation on the House floor.9Congressional Research Service. Parliamentary Rights of the Delegates and Resident Commissioner from Puerto Rico When the House sits as the Committee of the Whole, delegates and the Resident Commissioner can vote there as well, but if their votes would change the outcome, the full House immediately revotes without them.