In Croatia, Gradac families are Croats (from Ploce ), barely Bosniaks (from Zagreb ). In the past century, relatively most of Croatian residents bearing this family name were born in Ploce and Metkovic.
Prevalence
About 80 people with faimily name Gradac live in Croatia today, in 30 households. There were 40 of them in the middle of the past century, and their number doubled. They are only located in in 6 Croatian cities and two other places, mostly in Ploce (40), Zagreb (10), Peracko Blato (<10), Split (<5), and in Velika Gorica (<5).
Outside Croatia
Family name Gradac is present in four countries on three continents.
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.