Medunić families are Croats and they are mostly from Nova Gradiska area. In the past century, relatively most of Croatian residents bearing this family name were born in Gospic and Nova Gradiska. In Bilaj in Gospic every twentieth inhabitant had the family name Medunić.
About 90 people with faimily name Medunić live in Croatia today, in 50 households. There were 110 of them in the middle of the past century, and their number decreased by 20 percent. They are located in 10 Croatian counties, in 14 cities and 11 other places, mostly in Oriovac in Pleternica area (15), Zagreb (15), Bilaj (10), Karlovac (<10), and in Velika Gorica (<10).
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1917 in source List of Dignitaries, Officials and Public Servants of the Kingdom of Croatia-Slavonia.