Paul Tsongas, American lawyer and politician (b. 1941)
Paul Efthemios Tsongas (; February 14, 1941 – January 18, 1997) was an American politician. He represented Massachusetts in both houses of the United States Congress, holding office from 1975 to 1985. He won eight states as a candidate in the 1992 Democratic presidential primaries, losing the nomination to Bill Clinton.

Born in Lowell, Massachusetts, Tsongas graduated from Dartmouth College, Yale Law School and the Kennedy School of Government. After working for the Peace Corps and as an aide to Congressman F. Bradford Morse, Tsongas successively won election as a city councilor and county commissioner. In 1974, he won election to the United States House of Representatives in Massachusetts's 5th congressional district, over the incumbent Paul W. Cronin. In Massachusetts's 1978 Senate election, he defeated incumbent Republican Senator Edward Brooke. In Congress, Tsongas established a reputation as a social liberal and fiscal conservative.

Tsongas was diagnosed with non-Hodgkin lymphoma in 1983 and declined to seek re-election in 1984. He returned to politics after undergoing a successful bone marrow transplant. He experienced early success in the 1992 Democratic presidential primaries, winning the New Hampshire primary, but withdrew from the race in March 1992 and endorsed Clinton. An opponent of deficit spending, Tsongas co-founded the Concord Coalition. He died in 1997 of complications from pneumonia and non-Hodgkin lymphoma.