Ilijić families are mainly Croats and they are mostly from the Island of Krk , rarely Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Bosanian Posavina (Brcko area) and in Rijeka.
Prevalence
About 210 people with faimily name Ilijić live in Croatia today, in 100 households. There were 170 of them in the middle of the past century, and their number increased by 20 percent. They are located in 9 Croatian counties, in 20 cities and 16 other places, mostly in Omisalj on the Island of Krk (40), Zagreb (35), Rijeka (30), Banjol on the Island of Rab (15), and in Turjaci (15).
Outside Croatia
At least 28 families with this surname emigrated from Croatia to: the United States (21), Spain (4), Germany (1), Belgium (1), and to Argentina (1). Family name Ilijić (including: Ilijic , Ilijich and Ilievich ) is present in 13 countries on four continents. The family name "Ilijic " is used by small number of people in the United States , small number in Germany , and small number of people in Italy.
In the sources analysed in the project Acta Croatica so far, the name is mentioned over twenty times, the first time 1749 in source 18th Century Census.