In Croatia, Bratušek families are Croats (from Sisak area ). In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and Velika Gorica. In Desno Trebarjevo in Sisak area every nintieth inhabitant had the family name Bratušek.
About 30 people with faimily name Bratušek live in Croatia today, in 9 households. There were 30 of them in the middle of the past century, and their number remains constant. They are located in only four naselja i to in Zagreb (<10), Desno Trebarjevo in Sisak area (<10), Siljakovina (<5), and in Velika Gorica (<5).