In Croatia, Košaroš families are generally Croats (from Osijek area ), very rarely Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Osijek and in Osijek area.
Prevalence
About 10 people with faimily name Košaroš live in Croatia today, in five households only. There were 10 of them in the middle of the past century, and their number remains constant. They are located in only five naselja i to in Osijek (<10), Crikvenica (<5), Klenovica (<5), Slatina (<5), and in Smokvica Krmpotska (<5).
Outside Croatia
Family name Košaroš is present in three countries on three continents.