Kalyn Keller (born April 3, 1985) is an American former competition swimmer who represented the United States at the 2004 Summer Olympics in Athens, Greece.

In the women's 400-meter freestyle, she swam in the preliminary heats and recorded the tenth-best overall time of 4:09.83.

[2][3] She is the younger sister of American swimmer Klete Keller, who was also a member of the 2004 U.S. Olympic team.

[4] Shortly before the 2008 Olympics, Keller retired from swimming in order to battle Crohn's disease.

[3] Keller served as a commentator and reporter during the 2008 United States Olympic Swimming Trials.