Kocić families are predominantly Croats and they are mostly from Zupanja area , less frequently Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Zupanja area and in Bosanian Posavina (Bosanski Samac area).
Prevalence
About 110 people with faimily name Kocić live in Croatia today, in 40 households. There were 50 of them in the middle of the past century, and their number doubled. They are located in the most of Croatian counties, in 15 cities and 9 other places, mostly in Slavonski Samac (40) and Krusevica (15) in Zupanja area, Zagreb (<10), Slatina (<10), and in Rijeka (<10).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over thirty times, the first time 1906 in source Yearbook and Directory of Literary Society of St. Jerome 1906.