In Croatia, Dupalo families are predominantly Serbs, rarely Croats (from Opuzen area ). In the past century, relatively most of Croatian residents bearing this family name were born in Hrvatska Kostajnica area and in Sisak.
Prevalence
About 30 people with faimily name Dupalo live in Croatia today, in 18 households. There were 100 of them in the middle of the past century, and their number decreased significantly. They are located and 11 other Croatian places, mostly in Rujevac in Hrvatska Kostajnica area (<10), Zagreb (<5), Sisak (<5), Hrvatska Kostajnica (<5), and in Vukovar (<5).
Outside Croatia
Family name Dupalo is present in 8 countries on three continents. The family name "Dupalo " 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 1917 in source List of Dignitaries, Officials and Public Servants of the Kingdom of Croatia-Slavonia.