Sergey Punko or Sergei Punko (born in Navapolatsk on 10 January 1981) is a formerly Belarusian, now Russian Paralympic swimmer. He was born with a progressive eye disease, but had normal sight as a child. He started swimming at age 10, and competed nationally and internationally in able-bodied competition until he was 21. By that time, he had less than 5% vision. Classified S12, he began swimming in disability meets in 2002.