The Senate Ukraine Caucus (SUC) is a bipartisan[1] caucus of the United States Senate that was inaugurated on February 9, 2015 in Washington, D.C. Its mission is "to strengthen the political, military, economic, and cultural relationship between the United States and Ukraine."

Its counterpart in the House of Representatives is the Congressional Ukraine Caucus, which was established in 1997 and consists of 93 representatives.

[2] Senators Dick Durbin (D-IL) and Roger Wicker (R-MS) co-chair the SUC.

The two remained the caucus' Co-Chairs until Portman's retirement in 2023.

Senators Chris Murphy (D-CT), Sherrod Brown (D-OH), Jeanne Shaheen (D-NH), and Ron Johnson (R-WI) are the caucus' Vice-Chairs.