Krupa families are frequently Croats and they are mostly from Orahovica area , less frequently Slovaks (from Nasice ). In the past century, relatively most of Croatian residents bearing this family name were born in Nasice and in Orahovica area.
Prevalence
About 110 people with faimily name Krupa live in Croatia today, in 60 households. There were 130 of them in the middle of the past century, and their number decreased by 10 percent. They are located in the most of Croatian counties, in 14 cities and 23 other places, mostly in Breznica Nasicka in Nasice area (25), Zagreb (<10), Mikleus in Orahovica area (<10), Osijek (<10), and in Karlovac (<10).
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 2007 in source Encyclopaedia of Croatian Surnames.