In Croatia, Zastavnik families are Croats (from Pozega area ). In the past century, relatively most of Croatian residents bearing this family name were born in Pozega area and in Zagreb.
Prevalence
About 30 people with faimily name Zastavnik live in Croatia today, in 12 households. There were 30 of them in the middle of the past century, and their number remains constant. They are located in 6 Croatian counties, in 7 cities and two other places, mostly in Zagreb (<5), Pozega (<5), Karlovac (<5), Donja Batina (<5), and in Jaguplije in Pozega area (<5).
Outside Croatia
Family name Zastavnik is present in 10 countries on four continents. "Zastawnik " is used by some 300 people in Poland , small number in the United States , and small number of people in France.