Anton Sergeyevich Sintsov (; born 3 February 1985) is a Russian road and mountain bike racer. He rode at the cross-country event at the 2016 Summer Olympics. He was on the start list for the 2018 Cross-country European Championship and he finished 7th. At the 2020 Summer Olympics in mountain bike cross-country Sintsov finished 11th, the best result of a Russian in that event.