How many senators are there?

There are 100 senators in the United States Senate, two from each of the 50 states. This number is fixed by Article I, Section 3 of the Constitution, which states that the Senate of the United States shall be composed of two Senators from each State. The number of senators changes only when new states join the Union. When Hawaii became the 50th state in 1959, the Senate grew from 96 to 100 members, and it has remained at 100 since.

Each senator represents the entire state, not a smaller district, and serves a six-year term. The framers chose two senators per state to give every state equal voice in at least one chamber of Congress, regardless of population. This was a key part of the Connecticut Compromise that resolved the dispute between large and small states at the 1787 Constitutional Convention. A senator from Wyoming, with about 580,000 residents, has the same vote in the Senate as a senator from California, with nearly 40 million residents.

Critics have long argued this gives disproportionate power to small, less populous states. Defenders say it protects state sovereignty and forces national legislation to gain broad geographic support. Originally, senators were chosen by state legislatures, not by direct vote of the people. The 17th Amendment, ratified in 1913, changed that to direct popular election.

The Senate's six-year term was designed to insulate senators from short-term political pressures and give them time to develop expertise. Senate elections are staggered into three classes, with about one-third of seats up for election every two years. This means the Senate as a whole never turns over at once, providing institutional memory and stability.

Senators must be at least 30 years old, U.S. citizens for at least nine years, and residents of the state they represent at the time of election. The Senate is presided over by the Vice President of the United States, who casts a tie-breaking vote when the Senate is split 50 to 50.