Kostadinović families can be both Serbs and Croats (Krizevci). In the past century, relatively most of Croatian residents bearing this family name were born in Slavonski Brod and Osijek. In Kostadinovac in Krizevci nearly every inhabitant had the family name Kostadinović.
Prevalence
About 230 people with faimily name Kostadinović live in Croatia today, in 110 households. There were 240 of them in the middle of the past century, and their number remains constant. They are located in the most of Croatian counties, in 28 cities and 30 other places, mostly in Slavonski Brod (30), Zagreb (25), Zupanja (15), Cepin in Osijek area (15), and in Osijek (10).