In Croatia, Sopko families are predominantly Croats (from Zupanja area ), rarely Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Zupanja area and in Vinkovci.
Prevalence
About 20 people with faimily name Sopko live in Croatia today, in 6 households. There were 0 of them in the middle of the past century, and their number multiplied. They are located in only four Croatian places: in Mirkovci (10), Vinkovci (<5), and in Borovo (<5) and Petrovci (<5) in Vukovar area.