Frank Josef Kriz (March 26, 1894 – January 11, 1955) was an American gymnast and Olympic champion.

He was a member of the United States men's national artistic gymnastics team and competed in the 1920, 1924, and 1928 Summer Olympics.

[7] He worked as a fireman for Hook and Ladder 154 of the New York City Fire Department and required leave to participate in the Olympics.

[8] He received special approval, along with Bob McAllister, to make the trip to compete in the 1928 Summer Olympics.

[8] Kriz was the very first U.S. gymnast, male or female, to win a medal of any sort at a Summer Olympic Games or World Championships on foreign soil, and would remain the only one to win any medal at those such games on foreign soil for nearly half a century until Cathy Rigby won a silver on balance beam at the 1970 World Championships in Ljubljana and Peter Kormann won a bronze medal on floor exercise at the 1976 Montreal Summer Olympic Games.