In Croatia, Opassich families are Croats (from Pula ). In the past century, relatively most of Croatian residents bearing this family name were born in Pula.
Prevalence
Only a few people with faimily name Opassich live in Croatia today, in one household only. They are located in one Croatian city only, in Pula (<5).
Outside Croatia
Family name Opassich is present in this form only in Croatia.
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.