Kroupa families are Croats and they are mostly from Slatina. In the past century, relatively most of Croatian residents bearing this family name were born in Slatina and Kutina. In Bakić in Slatina every thirtieth inhabitant had the family name Kroupa.
Prevalence
About 80 people with faimily name Kroupa live in Croatia today, in 30 households. There were 70 of them in the middle of the past century, and their number increased by 20 percent. They are located in 6 Croatian counties, in 7 cities and 8 other places, mostly in Slatina (20), Kutina (20), Zagreb (10), Stipernica (<10), and in Sisak (<10).
Outside Croatia
Family name Kroupa is present in 22 countries on four continents. The family name "Kroupa " is used by some 3000 people in Czech Republic , about 1000 in the United States , and some 300 people in Germany.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1917 in source List of Dignitaries, Officials and Public Servants of the Kingdom of Croatia-Slavonia.