Šimunić families are Croats and they are mostly from Zadar area. According to other sources they are from Bilaj area or from Otocac. In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and Zadar. In Ponjušina in Middle Bosnia every third inhabitant had the family name Šimunić.
About 2300 people with faimily name Šimunić live in Croatia today, in 960 households. There were 2300 of them in the middle of the past century, and their number remains constant. They are located in almost all Croatian counties, in 66 cities and 194 other places, mostly in Zagreb (440), Bibinje in Zadar area (285), Vinkovci (85), Zapresic (80), and in Sesvete (60).