In Croatia, Jupek families are Croats (from Bosnian Krajina ), barely Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Bosnian Krajina (Mrkonjic Grad area) and in Pozega.
Prevalence
About 70 people with faimily name Jupek live in Croatia today, in 20 households. There were 10 of them in the middle of the past century, and their number multiplied. They are located in 6 Croatian counties, in 6 cities and 8 other places, mostly in Bankovci (10), Dubrovnik (10), Nova Gradiska (<10), Lipovljani in Novska area (<10), and in Novska (<10).
Outside Croatia
Family name Jupek is present in five countries on three continents. "Jupeck " is used by few people in the United States.