Jack Britton (October 14, 1885 – March 27, 1962) was an American boxer who was the first three-time world welterweight boxing champion. Born William J. Breslin in Clinton, New York, his professional career lasted for 25 years beginning in 1905. He holds the world record for the number of title bouts fought in a career with 37 (18 of which ended in no decisions), many against his arch-rival Ted "Kid" Lewis, against whom he fought 20 times. Statistical boxing website BoxRec lists Britton as the No. 6 ranked welterweight of all time while The Ring Magazine founder Nat Fleischer placed him at No. 3. He was inducted into the Ring Magazine Hall of Fame in 1960 and the International Boxing Hall of Fame as a first-class member in 1990.