In Croatia, Usorac families are predominantly Croats (from Ploce ), rarely Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Ploce and Koprivnica.
Prevalence
About 40 people with faimily name Usorac live in Croatia today, in 18 households. There were 60 of them in the middle of the past century, and their number decreased by 30 percent. They are located in 6 Croatian counties, in 6 cities and 7 other places, mostly in Stasevica (15), Gradac in Ploce area (10), Zagreb (<10), Koprivnica (<5), and in Donja Kovacica in Grubisno Polje area (<5).
Outside Croatia
Family name Usorac is present in five countries on three continents. The family name "Usorac " is used by few people in Australia and few people in the United States.