Mlačić 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 180 people with faimily name Mlačić live in Croatia today, in 80 households. There were 150 of them in the middle of the past century, and their number increased by 20 percent. They are located in 8 Croatian counties, in 12 cities and 16 other places, mostly in Vinisce in Trogir area (50), Split (50), Trogir (30), Rijeka (10), and in Zagreb (10).
Outside Croatia
Family name Mlačić is present in five countries on three continents.
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.