Apostag is a village and municipality in Bács-Kiskun county, in the Southern Great Plain region of southern Hungary.
Croats in Hungary call this village Štagara.
It covers an area of 31.94 km2 (12 sq mi) and has a population of 2105 people (2001).
In the medieval ages the village had a rotunda with 12 sided poligonal shape and its patrocinium was: The 12 Apostles. There was also similar patricinium of Bény rotunda, recently in Bíňa, Slovakia.
- Gervers-Molnár Vera: A középkori Magyarország rotundái. (Romanesque Round Churches of Medieval Hungary.) (Mûvészettörténeti Füzetek, 4.) Akadémiai Kiadó. Budapest, 1972.