In Croatia, Kusin families are generally Croats (from Zadar area ), very rarely Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and in Middle Bosnia (Sarajevo area).
Prevalence
About 10 people with faimily name Kusin live in Croatia today, in 7 households. There were 20 of them in the middle of the past century, and their number halved. They are located in two Croatian counties, two cities and another small place , mostly in Zagreb (<10), Zadar (<5), and in Galovac in Zadar area (<5).