In Croatia, Kušak families are Croats (from Lepoglava area ). In the past century, relatively most of Croatian residents bearing this family name were born in Lepoglava area.
Prevalence
Only a few people with faimily name Kušak live in Croatia today, in four households only. There were 20 of them in the middle of the past century, and their number decreased significantly. They are located in only four Croatian places: in Koprivnica (<5), Zagreb (<5), Ples in Lepoglava area (<5), and in Pustike in Velika Gorica area (<5).