In Croatia, Šimulija families are predominantly Serbs, rarely Croats (from Zadar area ). In the past century, relatively most of Croatian residents bearing this family name were born in Duga Resa area and in Petrinja. In Brdo Utinjsko in Duga Resa area every fifth inhabitant had the family name Šimulija.
Prevalence
About 40 people with faimily name Šimulija live in Croatia today, in 20 households. There were 60 of them in the middle of the past century, and their number decreased by 30 percent. They are located in 8 Croatian counties, in 9 cities and two other places, mostly in Brdo Utinjsko in Duga Resa area (20), Karlovac (<10), Kutina (<5), Zagreb (<5), and in Rijeka (<5).
Outside Croatia
Family name Šimulija is present in this form only in Croatia.