In Croatia, Arzenšek families are mainly Croats (from Hrvatska Kostajnica area ), rarely Slovenes (from Slovenia ), and . In the past century, relatively most of Croatian residents bearing this family name were born in Hrvatska Kostajnica area and in Slovenia.
Prevalence
About 20 people with faimily name Arzenšek live in Croatia today, in 12 households. There were 10 of them in the middle of the past century, and their number doubled. They are located and 5 other Croatian places, mostly in Fazana (<5), Osijek (<5), Zadar (<5), Hrvatska Dubica in Hrvatska Kostajnica area (<5), and in Murine (<5).
Outside Croatia
Family name Arzenšek is present in two countries on two continents. The family name "Arzensek " is used by small number of people in the United States.
