Dumenčić families are Croats and they are mostly from Slunj area. In the past century, relatively most of Croatian residents bearing this family name were born in Senj area and in Zagreb.
Prevalence
About 410 people with faimily name Dumenčić live in Croatia today, in 170 households. There were 380 of them in the middle of the past century, and their number increased by 10 percent. They are located in the most of Croatian counties, in 27 cities and 31 other places, mostly in Zagreb (65), Mundanije on the Island of Rab (25), Jezerane in Senj area (20), Osijek (20), and in Virovitica (20).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over five times, the first time 1923 in source Emigration Commission Zagreb.