Gradiški families are Croats and they are mostly from Krapina area. In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and in Krapina area.
Prevalence
About 100 people with faimily name Gradiški live in Croatia today, in 50 households. There were 170 of them in the middle of the past century, and their number decreased by 40 percent. They are located and 11 other Croatian places, mostly in Zagreb (50), Klokovec in Krapina area (25), Varazdin (<10), Busin (<10), and in Selno in Krapina area (<10).
Outside Croatia
At least two families with this surname emigrated from Croatia to the United States (1) and Canada (1). Family name Gradiški (including: Gradiski , Gradisky and Gradysky ) is present in five countries on two continents. The family name "Gradiski " is used by small number of people in the United States.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1902 in source Hartmann's General List of Apartments in Zagreb.