In Croatia, Ćasić families are mainly Serbs, less frequently Croats (from Bakr area ), and very rarely Czechs (from Bjelovar ). In the past century, relatively most of Croatian residents bearing this family name were born in Pakrac and Zagreb.
Prevalence
About 30 people with faimily name Ćasić live in Croatia today, in 15 households. There were 0 of them in the middle of the past century, and their number multiplied. They are located and threee other Croatian places, mostly in Pakrac (<10), Zagreb (<5), Antunovac in Osijek area (<5), Bjelovar (<5), and in Daruvar (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1906 in source Yearbook and Directory of Literary Society of St. Jerome 1906.