In Croatia, Koroša families are generally Croats (from Osijek area ), very rarely Bosniaks. In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and in Osijek area.
Prevalence
About 10 people with faimily name Koroša 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 five Croatian places: in Zagreb (<10), Darda in Osijek area (<5), Dragosicka in Dugo Selo area (<5), Samobor (<5), and in Glogovec Zagorski in Klanjec area (<5).
