Since its founding in 1925, Key Club International is the oldest and largest service program for high school students with over 270,046 active members. 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 1976, eleven years before women were admitted to the sponsoring organization, Kiwanis International.

The core values of Key Club International are:

-Character Building

The Key Club Pledge:

"I pledge, on my honor, to uphold the Objects of Key Club International; to build my home, school and community; to serve my nation and God; and combat all forces which tend to undermine these institutions."

2017 - 2018 International Board:

International President - William Sims
International Vice President - Minyoung Kim
International Trustee (Minnesota-Dakotas, Missouri-Arkansas, Ohio) - Hannah Nivar