Opašić families are Croats and they are mostly from Pazin area. In the past century, relatively most of Croatian residents bearing this family name were born in Pula and in Pazin area.
Prevalence
About 70 people with faimily name Opašić live in Croatia today, in 30 households. There were 120 of them in the middle of the past century, and their number decreased by 40 percent. They are located in four Croatian counties, in 6 cities and 5 other places, mostly in Cerovlje in Pazin area (20), Zagreb (15), Pazin (<10), Rijeka (<10), and in Pula (<5).
Outside Croatia
Family name Opašić (including: Opasic , Opasich and Opassich ) is present in 9 countries on two continents. The family name "Opasic " is used by small number of people in the United States.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 2007 in source Encyclopaedia of Croatian Surnames.