Radušić families are Croats and they are mostly from Zagreb. In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and in Ogulin area.
Prevalence
About 80 people with faimily name Radušić live in Croatia today, in 30 households. There were 60 of them in the middle of the past century, and their number increased by 30 percent. They are located in three Croatian cities only: in Zagreb (85), Labin (<5), and in Osijek (<5).
Outside Croatia
Family name Radušić is present in five countries on two continents.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 2007 in source Encyclopaedia of Croatian Surnames.