Demšić families are Croats and they are mostly from Djurdjevac area. In the past century, relatively most of Croatian residents bearing this family name were born in Djurdjevac area and in Virovitica.
Prevalence
About 90 people with faimily name Demšić live in Croatia today, in 40 households. There were 90 of them in the middle of the past century, and their number remains constant. They are located in 6 Croatian counties, in 6 cities and 6 other places, mostly in Pitomaca in Djurdjevac area (50), Zagreb (20), Spisic Bukovica in Virovitica area (10), Bjelovar (<10), and in Kladare in Djurdjevac area (<10).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over five times, the first time 1902 in source Hartmann's General List of Apartments in Zagreb.