Smiljčić families are mainly Croats and they are mostly from Banja Luka area (Bosnia), rarely Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Banja Luka Region, Bosnia (Banja Luka area) and in Bosanian Posavina (Bosanska Gradiska area).
Prevalence
About 120 people with faimily name Smiljčić live in Croatia today, in 50 households. They are located in the most of Croatian counties, in 11 cities and 21 other places, mostly in Zagreb (20), Latin in Slunj area (<10), Petrinja (<10), Gvozd in Glina area (<10), and in Djulovac in Daruvar area (<10).
Outside Croatia
Family name Smiljčić is present in three countries on two continents.
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.