Key Club International is the oldest and largest service program for high school students. It is a student-led organization whose goal is to teach leadership through helping. Key Club International is a part of the Kiwanis International family of service-leadership programs. Many local Key Clubs are sponsored by a local Kiwanis club.
The organization was started by California State Commissioner of Schools Albert C. Olney, and vocational education teacher Frank C. Vincent, who together worked to establish the first Key Club at Sacramento High School in California, on May 7, 1925. Female students were first admitted in 1977, ten years before women were admitted to the sponsoring organization, Kiwanis International.