In Croatia, Margušić families are almost entirely Croats (from Sisak area ), very rarely Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Sisak area and in Sisak.
Prevalence
About 30 people with faimily name Margušić live in Croatia today, in 10 households. There were 50 of them in the middle of the past century, and their number decreased by 40 percent. They are located in only four naselja i to in Mahovo in Sisak area (30), Zagreb (<10), Sisak (<5), and in Tisina Erdedska in Sisak area (<5).
Outside Croatia
Family name Margušić is present in three countries.