In Croatia, Sitek families are generally Croats (from Djurdjevac area ), very rarely Czechs (from Bjelovar ), and barely Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Bjelovar and in Djurdjevac area.
Prevalence
About 50 people with faimily name Sitek live in Croatia today, in 30 households. There were 90 of them in the middle of the past century, and their number decreased by 40 percent. They are only located in four Croatian cities and 8 other places, mostly in Podravske Sesvete in Djurdjevac area (30), Bjelovar (15), Zagreb (<10), Antunovac in Osijek area (<5), and in Zabjak in Bjelovar area (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1917 in source List of Dignitaries, Officials and Public Servants of the Kingdom of Croatia-Slavonia.