Odžak 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 Split and in Sinj area.
Prevalence
About 100 people with faimily name Odžak live in Croatia today, in 40 households. There were 70 of them in the middle of the past century, and their number increased by 40 percent. They are only located in in 6 Croatian cities and 5 other places, mostly in Split (35), Mravince (15), Pribude in Sinj area (15), Solin (15), and in Hrvace in Sinj area (15).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over twenty times, the first time 1906 in source Yearbook and Directory of Literary Society of St. Jerome 1906.