Kliment Andreyevich Kolesnikov (Russian: ??????? ????????? ??????????; born 9 July 2000) is a Russian swimmer.
He holds world junior records in ten events: 50/100/200 back in long course, as well as 50/100/200 free, 50/100/200 back and 100 IM in short course.
He made his debut at the 2017 World Aquatics Championships, where he competed in three backstroke events and set two world junior records.
In December 2017, he set a short course 100m backstroke world record at Vladimir Salnikov Cup, becoming the first swimmer born in the 2000s to hold a world record in an individual event.He won a total of six medals (3 gold, 2 silver and 1 bronze) at the 2018 European Championships and established a new 50m backstroke world record.
At the 2018 Summer Youth Olympics, Kolesnikov was chosen the flag bearer for Russia.