In Croatia, Gradinščak families are Croats (from Novi Marof area ). In the past century, relatively most of Croatian residents bearing this family name were born in Varazdin and Zagreb.
Prevalence
About 60 people with faimily name Gradinščak live in Croatia today, in 30 households. There were 130 of them in the middle of the past century, and their number halved. They are located in 6 Croatian counties, in 8 cities and 8 other places, mostly in Zagreb (25), Scepanje in Novi Marof area (<10), Varazdin (<10), Dugo Selo (<5), and in Novi Marof (<5).
Outside Croatia
Family name Gradinščak is present in 6 countries on four continents. The family name "Gradinscak " is used by some 80 people in Korea (South) , about 50 in the United States , and small number of people in Australia.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1924 in source Emigration Commission Zagreb.