The U.S. House of Representatives has 435 voting members and 6 non-voting members, for a total of 441 seats. The 435 voting representatives are divided among the 50 states by population; the 6 non-voting members represent the District of Columbia and five U.S. territories. Federal law has held the voting membership at 435 since 1929.
The 435 Voting Representatives
Federal statute caps the House at 435 voting members, divided among the 50 states in proportion to their populations.1Congressional Research Service. Size of the U.S. House of Representatives That number was set by the Permanent Apportionment Act of 1929, which directed that seats be divided based on “the then existing number of Representatives” after each census. The language survives today in 2 U.S.C. §2a.2Office of the Law Revision Counsel. 2 USC 2a – Reapportionment of Representatives
Before 1929, the House grew after nearly every census. Congress eventually decided that an ever-expanding chamber would make debate and vote-counting unworkable, so it froze the total. The practical consequence is that when one state gains population and picks up a seat, another state loses one. The pie never gets bigger.
A simple majority of the full House is 218 votes, the number needed to pass most legislation. That same threshold defines a quorum, the minimum number of members who must be present for the chamber to conduct business.3Library of Congress. ArtI.S5.C1.2 Quorums in Congress
The 6 Non-Voting Members
Beyond the 435 voting representatives, the House seats six non-voting members representing the District of Columbia, Puerto Rico, American Samoa, Guam, the U.S. Virgin Islands, and the Northern Mariana Islands.4Federal Register. U.S. House of Representatives Five of them carry the title “delegate.” Puerto Rico’s representative holds the distinct title of Resident Commissioner and is the only member of Congress elected to a four-year term.
In committee, non-voting members function almost identically to voting representatives. They question witnesses, offer amendments, participate in debate, and cast votes on legislation moving through committee.5Congressional Research Service. Parliamentary Rights of the Delegates and Resident Commissioner They can sponsor and cosponsor bills, manage floor debate time, and raise procedural objections. What they cannot do is vote on final passage on the House floor. That restriction is why the 435-member figure is the number that actually decides law.
How the 435 Seats Are Divided Among the States
The 435 seats are parceled out through apportionment. Article I, Section 2 of the Constitution requires a population count every ten years, and the results determine how many representatives each state gets.6Constitution Annotated. Enumeration Clause and Apportioning Seats in the House of Representatives Every state is guaranteed at least one seat regardless of population, a floor written directly into the Constitution.
Once the Census Bureau finishes counting, seats are allocated using the method of equal proportions, a formula Congress adopted in 1941.7United States Census Bureau. How Apportionment is Calculated The formula assigns a priority value to each potential seat by multiplying a state’s population by a mathematical multiplier, then awards seats in descending order of priority until all 435 are distributed.8United States Census Bureau. Computing Apportionment
Seat Counts After the 2020 Census
The most recent reapportionment, based on the 2020 census, shifted seven seats among 13 states. 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 gave up a seat.9U.S. Census Bureau. Apportionment 2020 Table D California still holds the largest delegation, at 52 seats. Six states (Alaska, Delaware, North Dakota, South Dakota, Vermont, and Wyoming) sit at the constitutional minimum of one representative each.10Congressional Research Service. Apportionment and Redistricting Process for the U.S. House of Representatives
All 435 Seats Are Up Every Two Years
Every voting member of the House serves a two-year term. Article I, Section 2 says representatives “shall be composed of Members chosen every second Year by the People of the several States.”11Library of Congress. U.S. Constitution – Article I All 435 seats appear on the ballot in every general election cycle, unlike the Senate, where only about a third of seats are contested at a time. The next nationwide House election is scheduled for November 2026.
There is no limit on how many terms a representative can serve. Some members have held their seats for decades. The short cycle was a deliberate choice by the framers, who wanted the chamber to stay closely tethered to public opinion.
How Vacant Seats Get Filled
When a House seat opens up due to a member’s death, resignation, or removal, the Constitution requires that it be filled through a special election rather than an appointment. Article I, Section 2 directs the governor of the affected state to issue a writ of election calling for voters to choose a replacement.12Congressional Research Service. House of Representatives Vacancies – How Are They Filled This is unlike the Senate, where governors in most states can appoint a temporary replacement.
State law controls the timing and procedures for these special elections, including how candidates are nominated and when the vote takes place.13Office of the Law Revision Counsel. 2 USC 8 – Vacancies States often align special elections with already-scheduled elections to save money and boost turnout. If a vacancy occurs late in a term, some states leave the seat empty for the remaining months rather than hold an election for a few weeks of service.
Federal law includes one emergency provision. If vacancies in the House exceed 100, the Speaker announces the extraordinary circumstances, and every affected state must hold a special election within 49 days of that announcement.13Office of the Law Revision Counsel. 2 USC 8 – Vacancies The provision was added after the September 11 attacks so the House could reconstitute itself quickly after a catastrophic event.