Class II - Senators Whose Terms of Service Expire in 2021

Class II terms run from the beginning of the 114th Congress on January 5, 2015, to the end of the 116th Congress on January 3, 2021. Senators in Class II were elected to office in the November 2014 general election, unless they took their seat through appointment or special election.

Article I, section 3 of the U.S. Constitution mandates the Senate's class structure.

Amendment XVII (1913) provides for direct election of senators.