In Croatia, Trupinić families are almost entirely Croats (from Nova Gradiska area ), barely Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Nova Gradiska and in Nova Gradiska area.
Prevalence
About 40 people with faimily name Trupinić live in Croatia today, in 15 households. There were 40 of them in the middle of the past century, and their number remains constant. They are located in threee Croatian counties, threee cities and another small place , mostly in Cernik in Nova Gradiska area (30), Nova Gradiska (<10), Zagreb (<10), and in Pozega (<5).
Outside Croatia
Family name Trupinić is present in two countries on two continents.
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.