Jay Paul Mortenson (born September 26, 1966) is an American former competition swimmer and Olympic gold medalist. He earned a gold medal by swimming for the winning U.S. team in the preliminary heats of the men's 4×100-meter medley relay at the 1988 Summer Olympics in Seoul, South Korea. He also finished sixth in the final of the men's 100-meter butterfly, and eleventh overall in the B Final of the men's 100-meter backstroke.
|Full name||Jay Paul Mortenson|
|National team||United States|
|Born||September 26, 1966|
|Height||6 ft 4 in (1.93 m)|
|Weight||190 lb (86 kg)|
|College team||Stanford University|