In Croatia, Koroušić families are generally Croats (from Middle Bosnia ), very rarely Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Middle Bosnia (Vares area) and in Vukovar.
Prevalence
About 10 people with faimily name Koroušić live in Croatia today, in five households only. There were 0 of them in the middle of the past century, and their number multiplied. They are located in three Croatian cities only: in Zagreb (<10), Karlovac (<5), and in Metkovic (<5).
Outside Croatia
Family name Koroušić is present in this form only in Croatia.