Iljić families are Croats and they are mostly from Bosnian Posavina. In the past century, relatively most of Croatian residents bearing this family name were born in Bosanian Posavina (Brcko area) and in Zupanja area.
Prevalence
About 70 people with faimily name Iljić live in Croatia today, in 20 households. There were 0 of them in the middle of the past century, and their number multiplied. They are located in 6 Croatian counties, in 7 cities and 9 other places, mostly in Vrbanja in Zupanja area (25), Zagreb (<10), Pula (<10), and in Posavski Podgajci (<10) and Bosnjaci (<10) in Zupanja area.
Outside Croatia
Family name Iljić (including: Iljic , Heljic , Ilyich , Iliici and Iliich ) is present in 18 countries on four continents.
In the sources analysed in the project Acta Croatica so far, the name is mentioned about one hundred times, the first time 1902 in source Hartmann's General List of Apartments in Zagreb.