In Croatia, Ivasić families are Croats (from Ozalj ), barely Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Karlovac and Ozalj.
Prevalence
About 60 people with faimily name Ivasić live in Croatia today, in 30 households. There were 40 of them in the middle of the past century, and their number increased by 40 percent. They are located in threee Croatian counties, threee cities and four other places, mostly in Karlovac (30), Zagreb (20), Krasic in Jastrebarsko area (<10), Mahicno (<5), and in Sveticko Hrasce (<5).
Outside Croatia
At least two families with this surname emigrated from Croatia to the United States (1) and France (1). Family name Ivasić (including: Ivasic , Ivasich , Ivassich and Ivasichko ) is present in 8 countries on three continents. The family name "Ivasic " is used by small number of people in the United States and small number in Austria.
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.