Anderson dos Santos (born 24 July 1985) is a Brazilian mixed martial artist who competed in the Bantamweight division of the Ultimate Fighting Championship.

Starting his career in 2011, Anderson compiled a 20–6 record fighting mainly for a large variety of regional Brazilian shows, winning multiple titles. His most notable victory in this time was winning the Titan FC Bantamweight Championship by submitting fellow future UFC fighter Ricky Simón via rear-naked choke in the second round.

dos Santos made his UFC debut as a replacement for Enrique Barzola against Nad Narimani on 17 November 2018, at UFC Fight Night: Magny vs. Ponzinibbio. He lost the fight via unanimous decision.

dos Santos faced Andre Ewell on 22 June 2019 at UFC Fight Night: Moicano vs. The Korean Zombie. He lost the fight via unanimous decision.

dos Santos was scheduled to face Jack Shore at UFC on ESPN: Kattar vs. Ige on 16 July 2020. However, dos Santos tested positive for COVID-19 before departing Brazil and was replaced by Aaron Phillips.

dos Santos faced Martin Day on 28 November 2020 at UFC on ESPN: Smith vs. Clark. He won the fight via first round guillotine choke.

dos Santos was scheduled to face Miles Johns on 17 July 2021 at UFC on ESPN 26. However, the bout was removed hours before the show due to COVID-19 protocol issues stemming from Dos Santos' camp. The bout was rescheduled and eventually took place at UFC 265 on 7 August 2021. dos Santos lost the fight via knockout in round three.

On 17 September 2021, it was announced that dos Santos was released by the UFC.