In Croatia, Višnjak families are Croats (from Ozalj ). In the past century, relatively most of Croatian residents bearing this family name were born in Karlovac and Ozalj.
Prevalence
About 20 people with faimily name Višnjak live in Croatia today, in 7 households. There were 30 of them in the middle of the past century, and their number decreased by 30 percent. They are located in only four naselja i to in Karlovac (10), Mali Erjavec (<5), Mahicno (<5), and in Sveticko Hrasce (<5).