Matijašević families are mainly Croats and they are mostly from Nova Gradiska area. According to some sources they are from Poljica, very rarely Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Bosanian Posavina (Bosanska Gradiska area) and in Split. In places Mačkovac , Donji Zovik and Dubravice Donje in Bosanian Posavina every seventh inhabitant had the family name Matijašević.
About 1300 people with faimily name Matijašević live in Croatia today, in 560 households. There were 1200 of them in the middle of the past century, and their number increased by 10 percent. They are located in almost all Croatian counties, in 67 cities and 126 other places, mostly in Zagreb (175), Split (105), Grab in Sinj area (80), Nova Gradiska (55), and in Sisak (35).