Čorko families are Croats and they are mostly from Lepoglava area. In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and in Lepoglava area. In Bračak in Zabok nearly every inhabitant had the family name Čorko.
Prevalence
About 150 people with faimily name Čorko live in Croatia today, in 60 households. There were 160 of them in the middle of the past century, and their number decreased by 0 percent. They are located in 7 Croatian counties, in 9 cities and 9 other places, mostly in Zagreb (50), Ivanec (25), Varazdin (20), and in Bedekovcina (15) and Krizance (15) in Lepoglava area.
In the sources analysed in the project Acta Croatica so far, the name is mentioned over ten times, the first time 1938 in source Phone Book - Zagreb 1938.