Boršćak 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 Varazdin and Zagreb.
Prevalence
About 90 people with faimily name Boršćak live in Croatia today, in 40 households. There were 40 of them in the middle of the past century, and their number doubled. They are located in 8 Croatian counties, in 10 cities and 17 other places, mostly in Beretinec in Varazdin area (15), Zagreb (10), Cresnjevo in Varazdin area (10), Koprivnica (<10), and in Novska (<10).
Outside Croatia
Family name Boršćak (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.