Konstantin Priahin (Russian: Константин Пряхин; born February 11, 1973) is a Kyrgyzstani former swimmer, who specialized in backstroke events.

He failed to reach the top 16 final in the 100 m backstroke, finishing forty-fifth in a time of 1:00.26.

[2] A member of the Kyrgyzstan team, he also placed twenty-first, along with Konstantin Andriushin, Yevgeny Petrashov, and Russian import Sergey Ashihmin, in the 4×100 m medley relay (3:56.24).

[4] He challenged seven other swimmers in heat two, including South Korea's 17-year-old Sung Min.

He registered a lifetime best of 59.86 to overhaul a minute barrier and pick up a seventh seed, finishing behind leader Sung by 2.71 seconds.