Zmajevo (Serbian Cyrillic: Змајево) is a village in Serbia. It is situated in the Vrbasmunicipality, in the South Bačka District, Vojvodina province. The village has a Serb ethnic majority and its population numbering 4,361 people (2002 census). It has beautiful lakes that are full of carp (Zmajevacka jezera), a very big hunting ground with a lot of wild animals. Anglers from all over Serbia come to Zmajevo to fish the most beautiful carp in Vojvodina.
In Serbian, the village is known as Zmajevo (Змајево), in German as Alt-Keer or Altker, and in Hungarian as Ókér. Older Serbian names of the village were: Pašićevo (Пашићево), Stari Ker (Стари Кер), Ker (Кер), and Bačka Dobra (Бачка Добра). The current name, Zmajevo, derived from nickname of Serbian poet Jovan Jovanović Zmaj.
It was recorded first in 1267. During Ottoman rule (16th-17th century), the village of Ker was populated by Serbs. Germans settled in the village in 1787, but after World War II, as a consequence of the war events, the German population (approximately 2,500 people) fled from the village.