Rajković families are mainly Croats and they are mostly from Otocac , rarely Serbs, and Montenegrins. In the past century, relatively most of Croatian residents bearing this family name were born in Otocac and Zagreb. In Dabar in Otocac every seventh inhabitant had the family name Rajković.
About 2000 people with faimily name Rajković live in Croatia today, in 860 households. There were 1800 of them in the middle of the past century, and their number increased by 10 percent. They are located in all Croatian counties, in 75 cities and 193 other places, mostly in Zagreb (290), Sisak (95), Vinkovci (75), Rijeka (60), and in Ivankovo in Vinkovci area (60).