Richard Green "Dick" Lugar (born April 4, 1932) is the senior United States Senator from Indiana. He is a member of the Republican Party and served as the mayor of Indianapolis from 1968 to 1976 and was elected to the United States Senate in 1976 where he has been the Chairman of the Senate Committee on Foreign Relations from 1985 to 1987 and 2003 to 2007. Much of Lugar's work in the Senate is toward the dismantling of nuclear, biological, and chemical weapons around the world.

On January 3, 2009, upon Ted Stevens losing his reelection bid, and the retirement of Pete Domenici, Lugar became the most senior Republican in the U.S. Senate. By tradition, were the Republican Party to gain control of the Senate, Lugar would be elected the President pro tempore of the United States Senate.

Lugar was born in Indianapolis, Indiana, to Bertha Green and Marvin Lugar. He attended the public schools of Indianapolis. During this time he attained the Boy Scouts' highest rank: Eagle Scout. Later, he became a recipient of the Distinguished Eagle Scout Award from the Boy Scouts of America. He graduated first in his class at Shortridge High School in 1950 as well as at Denison University in 1954 where he was a member of Beta Theta Pi. He went on to attend Pembroke College, Oxford, England, as a Rhodes Scholar, and received a graduate degree in 1956. Lugar was a member of Phi Beta Kappa. He served in the United States Navy from 1957 to 1960; one of his assignments was as an intelligence briefer for Admiral Arleigh Burke.