Koščec families are Croats and they are mostly from Lepoglava. In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and Lepoglava.
Prevalence
About 100 people with faimily name Koščec live in Croatia today, in 50 households. There were 180 of them in the middle of the past century, and their number decreased by 50 percent. They are located in 8 Croatian counties, in 10 cities and 21 other places, mostly in Zagreb (15), Gornja Toplicica (10), Sveti Ivan Zelina (10), Crkovec (<10), and in Varazdin (<10).
Outside Croatia
Family name Koščec (including: Koscec , Koschetz ) is present in 7 countries on three continents. "Koschetz " is used by small number of people in the United States.
In the sources analysed in the project Acta Croatica so far, the name is mentioned over ten times, the first time 1902 in source Hartmann's General List of Apartments in Zagreb.