兹雷尼亚宁（塞尔维亚语：Зрењанин，德语：Großbetschkerek）是塞尔维亚伏伊伏丁那自治省的一座城市，人口约8万（2002年）。

Zrenjanin (Serbian Cyrillic: Зрењанин, pronounced [zrɛ̌ɲanin]; Hungarian: Nagybecskerek; Slovak:Zreňanin) or Petrovgrad is a city located in the eastern part of Vojvodina, Serbia. It is the administrative centre of the Central Banat District. The city's population is 76,511, while the Zrenjanin county has 123,362 inhabitants (2011 census data).