The year 2020 was the 28th year in the history of the Ultimate Fighting Championship (UFC), a mixed martial arts promotion based in the United States.

Starting in 2021, a partnership between the UFC and Dapper Labs's Flow platform for MMA fans to own, maintain and trade UFC-branded collectibles was announced on February 26, 2020.

[1] Onwards from April 2021, the UFC announced Venum as their exclusive outfitting partner on July 11, 2020.

[4] Upsets Submissions Knockouts Fights The numbers below records the events, fights, techniques and fighters held or performed for the year of 2020 in UFC.

[18] These fighters have either been released from their UFC contracts, announced their retirement or joined other promotions: The following fighters fought their first UFC fight in 2020: The list below is based on fighters suspended either by (1) United States Anti-Doping Agency (USADA) or World Anti-Doping Agency (WADA) for violation of taking prohibited substances or non-analytical incidents, (2) by local commissions on misconduct during the fights or at event venues, or (3) by the UFC for reasons also stated below.