5 greatest UFC champions under the age of 30

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#4. Demetrious Johnson

Johnson's record stood at 24-2-1 when he turned 30

While Demetrious Johnson is no longer with the UFC, he was with the organization when he turned 30 and had already run up quite the resume. 'Mighty Mouse' became the inaugural flyweight champion and had eight title defenses under his belt before turning 30.

Johnson did not lose in the UFC's flyweight division during this spell and his last fight before turning 30 was a first-round knock-out victory over Henry Cejudo. Johnson was consistently exceptional throughout this run with the UFC.

While there were no particularly poor losses to blot Johnson's record, he did have losses at bantamweight. His reign was also somewhat compromised by the lack of high-profile talent in the rest of the division.

Johnson continues to fight today and lost his most recent bout for the ONE flyweight championship.

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#3. Georges St-Pierre

St. Pierre got his record to 22-2 before turning 30

Widely regarded by many as MMA's GOAT, Georges St-Pierre had plenty of success before and after turning 30. His resume prior to this milestone is sufficient to place him this high on the list.

St-Pierre first won the UFC welterweight championship at the age of 25 and quickly racked up six title defenses before he turned 30. What stands out about St-Pierre's victories in particular is the quality of opposition he faced.

Prior to St-Pierre turning 30, he had beaten the likes of Matt Hughes, B.J. Penn, Josh Koscheck, Jon Fitch, Jake Shields and more. His performances were usually dominant and he seemed untouchable at the top of the division despite his two losses. Both of which, he went on to avenge.