Polina Sergeevna Shmatko (, born March 26, 2003 in Moscow, Russia) is a Russian individual rhythmic gymnast. She is the 2016 European Junior Clubs, Ball champion and the 2018 European Junior Hoop champion. At national level she is the 2016 Russian Junior all-around silver medalist. She is 2018 European championships gold medalist in team event and in hoop finals. She retired because of health problems.