Muštra families are Croats and they are mostly from Trogir area. In the past century, relatively most of Croatian residents bearing this family name were born in Trogir and in Trogir area.
Prevalence
About 150 people with faimily name Muštra live in Croatia today, in 80 households. There were 110 of them in the middle of the past century, and their number increased by 40 percent. They are located in 6 Croatian counties, in 11 cities and 9 other places, mostly in Trogir (50), Split (35), Zagreb (20), and in Seget Gornji (20) and Seget Donji (10) in Trogir area.
Outside Croatia
Family name Muštra (including: Mustra , Mustera and Mustrah ) is present in 7 countries on three continents. The family name "Mustra " is used by small number of people in the United States.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1927 in source Emigration Commission Zagreb.