Gagulić families are almost entirely Croats and they are mostly from Bosnian Posavina , rarely Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Bosanian Posavina (Gradacac area) and in Bosanian Posavina (Modrica area).
Prevalence
About 400 people with faimily name Gagulić live in Croatia today, in 150 households. There were 80 of them in the middle of the past century, and their number multiplied. They are located in the most of Croatian counties, in 24 cities and 37 other places, mostly in Zupanja (75), Zagreb (70), Gradiste in Zupanja area (35), Gundinci in Djakovo area (30), and in Osijek (30).
Outside Croatia
At least five families with this surname emigrated from Croatia to: Germany (2), the United States (1), Australia (1), and to Austria (1). Family name Gagulić (including: Gagulic , Gagulich ) is present in 11 countries on three continents. The family name "Gagulic " is used by small number of people in Sweden , small number in Australia , and small number of people in the United States.
In the sources analysed in the project Acta Croatica so far, the name is mentioned over five times, the first time 1942 in source Phone Directory of the Independent State of Croatia 1942.