In Croatia, Ukušić families are almost entirely Croats (from Rovinj area ), very rarely Italians (from Rijeka ). In the past century, relatively most of Croatian residents bearing this family name were born in Pazin and Porec. In Ladrovići in Porec every fifth inhabitant had the family name Ukušić.
Prevalence
About 30 people with faimily name Ukušić live in Croatia today, in 15 households. There were 50 of them in the middle of the past century, and their number decreased by 30 percent. They are located in two Croatian counties, in 6 cities and 6 other places, mostly in Jezenj (<10), in Funtana (<10) and Vrsar (<5) in Rovinj area, Rijeka (<5), and in Pula (<5).
Outside Croatia
Family name Ukušić 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.