In Croatia, Mumić families are almost entirely Croats (from Slavonski Brod area ), barely Bosniaks, and . In the past century, relatively most of Croatian residents bearing this family name were born in Slavonski Brod area and in Slavonski Brod. In Prnjavor in Slavonski Brod area every tenth inhabitant had the family name Mumić.
Prevalence
About 50 people with faimily name Mumić live in Croatia today, in 20 households. There were 40 of them in the middle of the past century, and their number increased by 10 percent. They are located in 6 Croatian counties, in 6 cities and 9 other places, mostly in Prnjavor in Slavonski Brod area (20), Slavonski Brod (10), Djakovo (<10), Zagreb (<5), and in Prigorje Brdovecko in Zapresic area (<5).