Blažević families are Croats and they are mostly from Bosnian Posavina. In the past century, relatively most of Croatian residents bearing this family name were born in Bosanian Posavina (Brcko area) and in Banja Luka Region, Bosnia (Banja Luka area). In places Gornji Korićani and Carevo Polje in Middle Bosnia every sixth inhabitant had the family name Blažević.
About 7400 people with faimily name Blažević live in Croatia today, in 3000 households. There were 4000 of them in the middle of the past century, and their number increased by 80 percent. They are located in all Croatian counties, in 114 cities and 629 other places, mostly in Zagreb (1175), Split (445), Slavonski Brod (295), Rijeka (215), and in Osijek (165).