Ušljebrka families are almost entirely Croats and they are mostly from Benkovac , rarely Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Benkovac and Zadar. In Bjelina in Benkovac every fourth inhabitant had the family name Ušljebrka.
Prevalence
About 210 people with faimily name Ušljebrka live in Croatia today, in 90 households. There were 200 of them in the middle of the past century, and their number remains constant. They are located in 8 Croatian counties, in 16 cities and 7 other places, mostly in Bjelina (45), Rijeka (40), Zadar (40), Zagreb (30), and in Split (20).
Outside Croatia
At least four families with this surname emigrated from Croatia to: Australia (2), the United States (1), and to Germany (1). Family name Ušljebrka is present in this form only in Croatia.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 2007 in source Encyclopaedia of Croatian Surnames.