Jeff Farrell, American swimmer
Felix Jeffrey Farrell (born February 28, 1937) is an American former competition swimmer, Olympic champion, and former world record-holder in multiple relay events.

Farrell won a gold medal in the men's 100-meter freestyle at the 1959 Pan American Games in Chicago. In 1960, six days after having an appendectomy, Farrell qualified at the U.S. Olympic Trials. He competed at the 1960 Olympic Games in Rome, where he received gold medals as a member of the winning U.S. teams in the 4×100-meter medley relay and the 4×200-meter freestyle relay.Farrell is a multiple U.S. Masters Swimming world-record holder, and has held the fastest national times in his age group in dozens of events over past decades. He was photographed for and featured in ESPN's "The Body" issue in 2010.Farrell was inducted into the International Swimming Hall of Fame in 1968, and the International Masters Swimming Hall of Fame in 2011. He is the only swimmer to be inducted in both halls.

He set world records for Masters Swimming up until 2011. He has written a book about his Olympic experiences titled My Olympic Story, Rome 1960.