In Croatia, Kolaić families are mainly Serbs, less frequently Croats (also from Petrinja ). In the past century, relatively most of Croatian residents bearing this family name were born in Petrinja and Bjelovar.
Prevalence
Only a few people with faimily name Kolaić live in Croatia today, in three households only. There were 20 of them in the middle of the past century, and their number halved. They are located in only threee naselja i to in Petrinja (<5), Dragotinci (<5), and in Sisak (<5).
Outside Croatia
Family name Kolaić (including: Kolaic , Kolaich ) is present in four countries.