In Croatia, Mostarčić families are Croats (from Imotsko ). In the past century, relatively most of Croatian residents bearing this family name were born in Imotsko and Koprivnica.
Prevalence
About 30 people with faimily name Mostarčić live in Croatia today, in 14 households. There were 30 of them in the middle of the past century, and their number remains constant. They are only located in in 7 Croatian cities and another small place , mostly in Zagreb (20), Varazdin (<5), Solin (<5), Lucko (<5), and in Split (<5).
Outside Croatia
Family name Mostarčić is present in this form only in Croatia.