Serdarušić families are Croats and they are mostly from western Bosnia. In the past century, relatively most of Croatian residents bearing this family name were born in Western Bosnia (Tomislavgrad area) and in Bjelovar. In Raško Polje in Western Bosnia every tenth inhabitant had the family name Serdarušić.
Prevalence
About 230 people with faimily name Serdarušić live in Croatia today, in 90 households. There were 10 of them in the middle of the past century, and their number multiplied. They are located in the most of Croatian counties, in 20 cities and 17 other places, mostly in Zagreb (70), Bjelovar (30), Osijek (20), Novoseljani (15), and in Djakovo (15).
Outside Croatia
Family name Serdarušić is present in 7 countries on two continents.
In the sources analysed in the project Acta Croatica so far, the name is mentioned over five times, the first time 2007 in source Encyclopaedia of Croatian Surnames.