In Croatia, Sitvuk families are predominantly Serbs, rarely Croats (from Gospic area ), and . In the past century, relatively most of Croatian residents bearing this family name were born in Gospic area and in Gospic.
Prevalence
Only a few people with faimily name Sitvuk live in Croatia today, in four households only. There were 20 of them in the middle of the past century, and their number halved. They are located in only four naselja i to in Rijeka (<5), Dalj in Vinkovci area (<5), Licki Osik (<5), and in Klenovac in Gospic area (<5).
Outside Croatia
Family name Sitvuk is present in two countries on two continents. The family name "Sitvuk " is used by few people in the United States.
