Key Club
| Founded | May 7, 1925 | 
|---|---|
| Type | Service club | 
| Focus | Leadership, Character Building, Caring, and Inclusiveness | 
| Headquarters | Indianapolis, Indiana, United States | 
| Origins | Sacramento, California, United States | 
Area served   | Worldwide | 
| Method | Community service | 
| Membership | 229,652 (2020) | 
International President  | David Robaina | 
International Vice President  | Carissa Andorf | 
International Trustees  | 
  | 
Director  | Matt Ellis | 
Parent organization  | Kiwanis International | 
| Revenue | US$1,782,484 (2019) | 
| Staff | 120 | 
| Website | www.keyclub.org | 
Key Club International, also called Key Club, is an international service organization for high school students. Key Club International is the high school branch of the Kiwanis International family, classified as a Service Leadership Program and more specifically as a Kiwanis Youth Program. Many 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 worked together 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.
Key Club International began a 100-day countdown celebration leading up to the 100th anniversary in 2025 with celebratory events throughout the country prior to International Convention.