In Croatia, Šušteršić families are generally Croats (from Ozalj ), very rarely Slovenes (from Zagreb ), and . In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and Karlovac.
Prevalence
About 30 people with faimily name Šušteršić live in Croatia today, in 12 households. There were 30 of them in the middle of the past century, and their number remains constant. They are located in 6 Croatian counties, in 7 cities and another small place , mostly in Vrhovac (10), Zagreb (10), Zadar (<5), Umag (<5), and in Stari Grabovac (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over five times, the first time 1924 in source Emigration Commission Zagreb.