Youngest World Heavyweight Champions

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+).

RELATED LINKS:

• World Heavyweight Championship Records and Statistics
• Most Opponents Beaten for World Heavyweight Title
• Most Wins in World Heavyweight Title Fights
• Most Opponents Beaten During One World Heavyweight Title Reign
• Most Consecutive World Heavyweight Title Defenses
• Longest Combined World Heavyweight Title Reigns
• Longest Individual World Heavyweight Title Reigns
• Fastest Stoppages in World Heavyweight Title Fights
• Most World Heavyweight Title Bout Wins & Beaten Opponents By Stoppage
• Highest Knockout-To-Win & Knockout-To-Beat-Opponent Percentage in World Heavyweight Title Fights
• Oldest World Heavyweight Champions
• Fastest World Heavyweight Title Wins
• Most Opponents Beaten for World Heavyweight Title by Country
• Most Wins in World Heavyweight Title Fights by Country
• Most Opponents World Heavyweight Title Was Successfully Defended Against During One Reign by Country
• Most Consecutive World Heavyweight Title Defenses by Country

All Championships

As of May 24, 2026.

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

Undisputed/Lineal/The Ring Championships

The list only includes days when the champion, alongside a major world title, held

• Undisputed Championship (02.07.1921–present)
• Lineal Championship (1885–02.07.1921)
• The Ring Championship.

As of June 10, 2026.

Pos.	Name	Recognition	Date	Age
1.	Mike Tyson	undisputed	August 1, 1987	21 years, 1 month, 2 days
2.	Floyd Patterson	undisputed, The Ring	November 30, 1956	21 years, 10 months, 26 days
3.	Muhammad Ali	undisputed, The Ring	February 25, 1964	22 years, 1 month, 8 days
4.	Joe Louis	undisputed, The Ring	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	undisputed, The Ring	February 22, 1973	24 years, 0 months, 12 days
7.	James J. Jeffries	Lineal	June 9, 1899	24 years, 1 month, 25 days
8.	Leon Spinks	undisputed, The Ring	February 15, 1978	24 years, 7 months, 4 days
9.	Tommy Burns	Lineal	January 16, 1902	24 years, 8 months, 6 days
10.	Max Schmeling	undisputed, The Ring	June 12, 1930	24 years, 8 months, 15 days