Borščak families are Croats and they are mostly from Varazdin area. In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and Varazdin.
Prevalence
About 130 people with faimily name Borščak live in Croatia today, in 60 households. There were 170 of them in the middle of the past century, and their number decreased by 20 percent. They are located in the most of Croatian counties, in 13 cities and 24 other places, mostly in Kasina (15), Varazdin (15), Zagreb (15), Beretinec in Varazdin area (15), and in Blagusa (<10).
Outside Croatia
Family name Borščak (including: Borscak , Borschak and Borshchak ) is present in 12 countries on three continents.
In the sources analysed in the project Acta Croatica so far, the name is mentioned over five times, the first time 1917 in source List of Dignitaries, Officials and Public Servants of the Kingdom of Croatia-Slavonia.