Kobaš families are Croats and they are mostly from Bosnian Posavina. In the past century, relatively most of Croatian residents bearing this family name were born in Bosanian Posavina (Orasje area) and in Bosanian Posavina (Bosanski Samac area).
About 350 people with faimily name Kobaš live in Croatia today, in 140 households. There were 20 of them in the middle of the past century, and their number multiplied. They are located in the most of Croatian counties, in 22 cities and 31 other places, mostly in Zupanja (110), Stitar (45), Zagreb (25), Vinkovci (25), and in Bosnjaci in Zupanja area (25).