Blaženko Lacković (born 25 December 1980) is a retired Croatian handball player.

He was a member of German club SG Flensburg-Handewitt, which reached the EHF Champions League final in 2007.

He eventually won the title with HSV Hamburg during the 2012–13 season.

After six years in Hamburg Lacković signed for Macedonian side RK Vardar Skopje in the summer of 2014.On February 3, 2016 Lackovic signed for German club THW Kiel.

In Kiel he plays with his teammates in national team Domagoj Duvnjak and Ilija Brozovic.