Sopek families are Croats and they are mostly from Krapina area. In the past century, relatively most of Croatian residents bearing this family name were born in Krapina area and in Krapina. In places Rovno and Benkovec Petrovski in Krapina area every fourth inhabitant had the family name Sopek.
Prevalence
About 120 people with faimily name Sopek live in Croatia today, in 50 households. There were 70 of them in the middle of the past century, and their number increased by 80 percent. They are located in 7 Croatian counties, in 9 cities and 14 other places, mostly in Rovno in Krapina area (20), Marijanci in Belisce area (15), Tounj in Ogulin area (15), Belisce (15), and in Krapina (15).
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.