In Croatia, Rostaš families are generally Croats (from Vinkovci ), very rarely Rusyns (from Vukovar ), and . In the past century, relatively most of Croatian residents bearing this family name were born in Vinkovci and Sisak.
Prevalence
About 40 people with faimily name Rostaš live in Croatia today, in 14 households. There were 10 of them in the middle of the past century, and their number multiplied. They are located in four Croatian counties and threee other places, mostly in Vinkovci (20), Sisak (<10), Zagreb (<5), Petrovci in Vukovar area (<5), and in Petrinja (<5).