In Croatia, Košarić families are predominantly Croats (from Sibenik ), rarely Serbs, and very rarely Hungarians. In the past century, relatively most of Croatian residents bearing this family name were born in Duga Resa area and in Zagreb.
Prevalence
About 20 people with faimily name Košarić live in Croatia today, in 14 households. There were 30 of them in the middle of the past century, and their number decreased by 20 percent. They are located and two other Croatian places, mostly in Zagreb (<10), Sibenik (<5), Petrinja (<5), and in Vojnic (<5) and Hrvatsko Zariste (<5) in Duga Resa area.