In Croatia, Košćica families are generally Croats (from the Island of Ugljan ), very rarely Slovenes (from Kutina ), and barely Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and Jastrebarsko.
Prevalence
About 60 people with faimily name Košćica live in Croatia today, in 30 households. There were 20 of them in the middle of the past century, and their number tripled. They are located in four Croatian counties and 8 other places, mostly in Kukljica on the Island of Ugljan (15), Zagreb (15), Jastrebarsko (10), Samobor (<10), and in Braslovje (<10).
Outside Croatia
At least one family with this surname emigrated from Croatia to the United States. Family name Košćica is present in 10 countries on four continents. The family name "Koscica " is used by some 200 people in the United States , small number in Russian Federation , and small number of people in Australia.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1906 in source Yearbook and Directory of Literary Society of St. Jerome 1906.