Mustić families are mainly Croats and they are mostly from Split , often Bosniaks (from Bosnian Posavina ). In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and Split.
Prevalence
About 80 people with faimily name Mustić live in Croatia today, in 30 households. There were 30 of them in the middle of the past century, and their number more than doubled. They are located in 6 Croatian counties, in 10 cities and four other places, mostly in Zagreb (30), Split (30), Grohote on the Island of Solta (<10), Krizevci (<10), and in Pula (<5).
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.