Sergey Ashihmin (; is a Russian-born Kyrgyz former swimmer, who specialized in sprint freestyle events. He is a two-time Olympian (1996 and 2000), and a former Kyrgyzstan record holder in the 50 and 100 m freestyle. While playing for the Russian senior team, Ashihmin also earned a silver medal, along with Denis Pimankov, Dmitry Chernyshov, and double Olympic champion Alexander Popov, in the 4×100 m freestyle relay at the 1999 European Aquatics Championships in Istanbul, Turkey.