Serhiy Tkachuk or Sergey Tkachuk (; born 15 February 1992) is a professional Ukrainian-born Kazakhstani football goalkeeper.
Tkachuk is the product of FC Dynamo Kyiv sportive system and become to attend the football school at age 7.
On 2 February 2016, Tkachuk left FC Kairat.
During the winter of 2012 Tkachuk accepted the citizenship of Kazakhstan.