List of Famous people with last name Dempsey

John Noel Dempsey, was an American politician who was the 81st Governor of Connecticut. He was a Democrat, and began his political career at the age of 21 serving on the Putnam City Council. He later served as mayor of Putnam, before being elected to Governor of Connecticut.

John Edward Kelly was an Irish-American boxer, better known as Nonpareil Jack Dempsey who was the first holder of the World Middleweight Championship (1884–1891). He was nicknamed "Nonpareil" because of his reputation of being unbeatable.

John Joseph Dempsey was a United States Representative from New Mexico who also served as the 13th governor of New Mexico. He was born in White Haven, Pennsylvania, where he attended grade school. Employed as a telegrapher, he held various positions with the Brooklyn Union Elevator Company. He was the vice president of the Brooklyn Rapid Transit Company until 1919 when he entered the oil business in Oklahoma and became vice president of the Continental Oil and Asphalt Company. He moved to Santa Fe, New Mexico, in 1920 and was an independent oil operator and in 1928 became president of the United States Asphalt Company.