In Croatia, Stupnišek families are almost entirely Croats (from Zlatar ), barely Slovenes (from Zagreb ). In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and Zlatar.
Prevalence
About 50 people with faimily name Stupnišek live in Croatia today, in 20 households. There were 40 of them in the middle of the past century, and their number increased by 20 percent. They are located and four other Croatian places, mostly in Zagreb (30), Osijek (<10), Tkalci (<5), Donja Batina (<5), and in Pretkovec (<5).
Outside Croatia
Family name Stupnišek is present in two countries.
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.