There are 535 voting members of the U.S. Congress: 100 senators and 435 representatives. If you include the non-voting delegates and the resident commissioner in the House, the total membership count rises to 541 (435 voting representatives plus 6 non-voting members, plus 100 senators).

Basic breakdown

  • Senate : 100 members, two from each of the 50 states.
  • House of Representatives (voting) : 435 seats, apportioned among the states by population.
  • Non‑voting House members : 6 (from Washington, D.C., Puerto Rico, Guam, American Samoa, the U.S. Virgin Islands, and the Northern Mariana Islands).

Why 435 in the House?

  • The House was expanded over time as the population grew but was capped at 435 seats by law in 1911, a limit that still applies today.
  • After each census, seats are re-apportioned among states, but the total stays at 435, which drives periodic debates about whether the House should be enlarged to reflect population growth.

Current Congress context

  • The current 119th Congress, which convened in January 2026, still operates with 100 senators and a 435-seat House, though there can be temporary vacancies due to resignations, deaths, or delayed elections.
  • Even when some seats are vacant, the authorized size remains 535 voting members, and House control can hinge on just a few filled or unfilled seats.

Information gathered from public forums or data available on the internet and portrayed here.