Frank X. Kugler (March 29, 1879, Germany – July 7, 1952, St. Louis, Missouri) was an American wrestler, weightlifter and tug of war competitor who competed in the 1904 Summer Olympics.
In 1904 he won a silver medal in wrestlings' heavyweight category, bronze medals in weightliftings' two hand lift and all-around dumbbell events and another bronze in the tug of war competition as a member of Southwest Turnverein of Saint Louis No. 2 team. He is recognised as an American by the IOC although he was a German national at the time of the Games.
Despite taking last place in 9 out of 10 events in the dumbbell competition he was awarded the bronze as there were only 3 competitors.
He is the only competitor to win a medal in three different sports at the same Olympic Games.