Sebastian Kłosiński (born 4 August 1992, in Warsaw)[1] is a Polish speed skater.
Kłosiński won the bronze medal in the Team sprint event at the 2018 European Speed Skating Championships in Kolomna together with Piotr Michalski and Artur Nogal.[2] He is trained by Tuppu Nieminen, a retired Finnish speed skater.