Šimunčić families are Croats and they are mostly from Novi Marof area. According to some sources they are from Medjugorje or from Koprivnica. In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and in Novi Marof area. In Letovčan Tomaševečki in Klanjec every fifth inhabitant had the family name Šimunčić.
Prevalence
About 140 people with faimily name Šimunčić live in Croatia today, in 50 households. There were 170 of them in the middle of the past century, and their number decreased by 20 percent. They are located in 10 Croatian counties, in 11 cities and 17 other places, mostly in Zagreb (40), Pesek (15), Sesvete (10), Varazdin (10), and in Draskovic in Novi Marof area (<10).
Outside Croatia
Family name Šimunčić is present in this form only in Croatia.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1902 in source Hartmann's General List of Apartments in Zagreb.