The 114th United States Congress was a meeting of the legislative branch of the United States of America federal government, composed of the United States Senate and the United States House of Representatives. It met in Washington, D.C., from January 3, 2015, to January 3, 2017, during the final two years of Barack Obama's presidency. The seats in the House were apportioned based on the 2010 United States census.

The 2014 elections gave the Republicans control of the Senate and the House for the first time since the 109th Congress. With 248 seats in the House of Representatives and 54 seats in the Senate, this Congress began with the largest Republican majority since the 71st Congress of 1929–1931. As of 2025^[update], this was the most recent Congress in which the Senate was controlled by the opposing party of the president for its entire session.

Section contents: Senate: Majority (R), Minority (D) • House: Majority (R), Minority (D)

Senators are listed by state and then by Senate classes, In this Congress, Class 3 meant their term ended with this Congress, requiring re-election in 2016; Class 1 meant their term began in the last Congress, requiring re-election in 2018; and Class 2 meant their term began in this Congress, requiring re-election in 2020.

There were no changes in Senate membership during this Congress.

[Section contents: Senate, House, Joint ]

Source: "Senate Organization Chart for the 114th Congress". Senate.gov. US Senate. Archived from the original on March 28, 2015. Retrieved January 26, 2015.

Source: "Officers and Organizations of the House". House.gov. US House. Archived from the original on July 6, 2017. Retrieved January 26, 2015.