Mrgan families are Croats and they are mostly from Pleternica area. In the past century, relatively most of Croatian residents bearing this family name were born in Slunj and in Slunj area.
Prevalence
About 230 people with faimily name Mrgan live in Croatia today, in 100 households. There were 180 of them in the middle of the past century, and their number increased by 30 percent. They are located in the most of Croatian counties, in 21 cities and 35 other places, mostly in Brodski Stupnik in Pleternica area (30), Karlovac (25), Brezovac (15), Stari Mikanovci in Djakovo area (15), and in Vodjinci in Vinkovci area (15).