Mrkonjić families are usually Croats and they are mostly from Imotski area , barely Serbs and Bosniaks (iz Tuzla Region, Bosnia). In the past century, relatively most of Croatian residents bearing this family name were born in Split and in Tuzla Region, Bosnia (Tuzla area).
About 1000 people with faimily name Mrkonjić live in Croatia today, in 410 households. There were 380 of them in the middle of the past century, and their number more than doubled. They are located in the most of Croatian counties, in 41 cities and 89 other places, mostly in Zagreb (160), Zmijavci in Imotski area (110), Split (85), Babina Greda in Zupanja area (70), and in Osijek (60).