Ken Ograjenšek (born 30 August 1991) is a Slovenian professional ice hockey player for the Graz 99ers of the Austrian Hockey League (EBEL).
He previously played two seasons in the French Ligue Magnus with Dauphins d'Épinal before signing a two-year contract with Graz in a return to the EBEL on 4 July 2016.He has played internationally with the Slovenian national team.
He participated at the 2015 IIHF World Championship.