Sveti Ivan Zelina is a town in Zagreb County, Croatia. In the late 19th and early 20th century, Sveti Ivan Zelina was a district capital in the Zagr…Sveti Ivan Zelina is a town in Zagreb County, Croatia. In the late 19th and early 20th century, Sveti Ivan Zelina was a district capital in the Zagreb County of the Kingdom of Croatia-Slavonia. From 1947 to 1990, during the communist regime, the town was known as Zelina.