In Croatia, Balaj families are mainly Albanians (from Osijek area ), rarely Croats (from Slatina ), and . In the past century, relatively most of Croatian residents bearing this family name were born in Kosovo and in Vinkovci area.
Prevalence
About 10 people with faimily name Balaj live in Croatia today, in five households only. There were 20 of them in the middle of the past century, and their number halved. They are located in 6 Croatian counties, in 7 cities and another small place , mostly in Darda in Osijek area (<10), Otok in Vinkovci area (<10), Zagreb (<10), Slatina (<5), and in Vinkovci (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1902 in source Hartmann's General List of Apartments in Zagreb.