U.S. Senate — the office

This library is Side One. It teaches the job.

A United States Senator is elected statewide. Each state has two Senators. The term is six years. The Senate does not stand all at once: seats are split into three classes, so about one-third of the chamber is on the ballot every even year.

These pages are educational. They are not official government notices, not legal advice, and not an endorsement. For the race, use the Senate Elections twin.

Confirm the Senator of record on Senate.gov.

The three classes

• Class I — next regular election 2030 (33 seats). Senate.gov Class I
• Class II — next regular election 2026, Tuesday November 3, 2026 (33 seats). Senate.gov Class II
• Class III — next regular election 2028 (34 seats). Senate.gov Class III

A vacancy can add a special election. In 2026, Florida and Ohio also fill Class III remainders. Arizona is not on the 2026 Senate ballot.

Find a seat

Inch along. The mold is Arizona — Class I and Class III.

• Arizona Class I

• Arizona Class III

• Alabama Class II

• Alabama Class III

• Delaware Class I

• Delaware Class II

• Arkansas Class II

• Arkansas Class III

• Colorado Class II

• Colorado Class III

• Alaska Class II

• Alaska Class III

• Connecticut Class I

• Connecticut Class III

• Florida Class I

• Florida Class III

• Georgia Class II

• Georgia Class III

• California Class I

• California Class III

U.S. House offices · Counties · Legal