In Croatia, Capjak families are generally Croats (from Zupanja area ), barely Hungarians, and . In the past century, relatively most of Croatian residents bearing this family name were born in Zupanja area and in Bosanian Posavina (Brcko area).
Prevalence
About 60 people with faimily name Capjak live in Croatia today, in 20 households. There were 20 of them in the middle of the past century, and their number tripled. They are located in 6 Croatian counties, in 6 cities and 5 other places, mostly in Soljani in Zupanja area (25), Zagreb (25), Rijeka (<5), Vinkovci (<5), and in Vukovar (<5).