Prološčić families are Croats and they are mostly from Sinj area. In the past century, relatively most of Croatian residents bearing this family name were born in Sinj area and in Sinj.
Prevalence
About 190 people with faimily name Prološčić live in Croatia today, in 70 households. They are located in 9 Croatian counties, in 16 cities and 16 other places, mostly in Potravlje in Sinj area (40), Sinj (35), Osijek (25), Ruscica in Slavonski Brod area (15), and in Josipovac (<10).
Outside Croatia
Family name Prološčić is present in this form only in Croatia.
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.