Dupor families are mainly Croats and they are mostly from Cazma , often Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Obrovac and Zadar.
Prevalence
About 130 people with faimily name Dupor live in Croatia today, in 70 households. There were 180 of them in the middle of the past century, and their number decreased by 30 percent. They are located in the most of Croatian counties, in 18 cities and 15 other places, mostly in Zagreb (15), Rijeka (15), Varazdin (10), Zadar (<10), and in Split (<10).
Outside Croatia
At least three families with this surname emigrated from Croatia to Austria (2) and the United States (1). Family name Dupor is present in 11 countries worldwide. The family name "Dupor " is used by some 70 people in the United States , small number in France , and small number of people in Austria.
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.