In Croatia, Omerčić families are predominantly Bosniaks (from Bosnian Posavina ), rarely Croats (from Petrinja ), and very rarely Albanians. In the past century, relatively most of Croatian residents bearing this family name were born in Doboj, Bosnia (Doboj area) and in Bosanian Posavina (Gradacac area). In Mionica in Bosanian Posavina every twentieth inhabitant had the family name Omerčić.
Prevalence
About 60 people with faimily name Omerčić live in Croatia today, in 20 households. They are located in 10 Croatian counties, in 13 cities and 11 other places, mostly in Zagreb (15), Pula (10), Vodnjan in Pula area (<10), Gunja in Zupanja area (<10), and in Rijeka (<10).
Outside Croatia
Family name Omerčić is present in 8 countries on three continents. The family name "Omercic " is used by small number of people in Canada , small number in the United States , and small number of people in Malaysia.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1942 in source Phone Directory of the Independent State of Croatia 1942.