Youngest World Heavyweight Champions

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Listing of youngest World Heavyweight Champions by age at their first day as champion. The maximum weight for this division is unlimited (200+ lbs, 90.9+ kg, 14 stone 4 lbs+).

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All Championship Reigns

Pos. Name Recognition Date Age
1. Mike Tyson WBC November 22, 1986 20 years, 4 months, 23 days
2. Floyd Patterson NBA, NYSAC November 30, 1956 21 years, 10 months, 26 days
3. Muhammad Ali WBA, WBC February 25, 1964 22 years, 8 days
4. Joe Louis NBA, NYSAC June 22, 1937 23 years, 1 month, 9 days
5. Jack Dempsey Lineal July 4, 1919 24 years, 0 months, 10 days
6. George Foreman WBA, WBC February 22, 1973 24 years, 0 months, 12 days
7. Joe Frazier NYSAC March 4, 1968 24 years, 1 month, 21 days
8. James J. Jeffries Lineal June 9, 1899 24 years, 1 month, 25 days
9. Michael Dokes WBA December 10, 1982 24 years, 4 months
10. Wladimir Klitschko WBO October 14, 2000 24 years, 6 months, 19 days

Championship Reigns of Undisputed Champions/Lineal Champions/The Ring Champions

The list does not include The Ring and lineal championship fights after 1921, although it only includes title reigns during which the champion captured undisputed championship (1922–present), lineal championship (1885–1921) or The Ring championship (1922–1989, 2002–).

Pos. Name Recognition Date Age
1. Mike Tyson WBC November 22, 1986 20 years, 4 months, 23 days
2. Floyd Patterson NBA, NYSAC November 30, 1956 21 years, 10 months, 26 days
3. Muhammad Ali WBA, WBC February 25, 1964 22 years, 8 days
4. Joe Louis NBA, NYSAC June 22, 1937 23 years, 1 month, 9 days
5. Jack Dempsey Lineal July 4, 1919 24 years, 0 months, 10 days
6. George Foreman WBA, WBC February 22, 1973 24 years, 0 months, 12 days
7. Joe Frazier NYSAC March 4, 1968 24 years, 1 month, 21 days
8. James J. Jeffries Lineal June 9, 1899 24 years, 1 month, 25 days
9. Leon Spinks WBA February 15, 1978 24 years, 7 months, 4 days
10. Tommy Burns Lineal January 16, 1902 24 years, 8 months, 6 days