Presented as a historical snapshot for that month. Use the weight-class arrows to move up or down divisions, the month controls to jump between updates, and click any fighter's name to see their ranking history with the IBF.
| Rank | IBFDecember 2005 |
|---|---|
| 🏆 | Vacant |
| 1 | Vacant |
| 2 |  Wladimir Klitschko |
| 3 |  Ray Austin |
| 4 | Calvin Brock |
| 5 | James Toney |
| 6 | Monte Barrett |
| 7 |  Samuel Peter |
| 8 | Vacant |
| 9 | Davarryl Williamson |
| 10 |  Luan Krasniqi |
| 11 |  Paolo Vidoz |
| 12 |  Sultan Ibragimov |
| 13 | Zuri Lawrence |
| 14 | Shannon Briggs |
| 15 |  Danny Williams |
Source: IBF
The Heavyweight division is boxing's most prestigious weight class, featuring the largest fighters in the sport. Historically, heavyweight champions have been among the most famous athletes in the world, with legendary figures like Muhammad Ali, Joe Louis, and Mike Tyson defining eras of boxing history.
Heavyweight boxers rely on power and size, with knockouts being more common than in lighter divisions. The division has no upper weight limit, allowing for a wide range of body types and fighting styles.
The Heavyweight division has produced some of boxing's most iconic moments and biggest pay-per-view events. Modern heavyweights combine size, power, and athleticism in ways that previous generations couldn't match.
Heavyweight boxing has been a cornerstone of professional boxing since the sport's early days. The division has evolved significantly, with modern heavyweights being faster and more athletic than their predecessors while maintaining devastating power.
Learn more about how boxing rankings work or explore current world champions across all divisions.
Champions who have held each belt, from oldest to most recent. Title history only goes back as far as our earliest IBF monthly rankings (December 2005).