The South Bačka District is one of seven administrative districts of the autonomous province of Vojvodina, Serbia. Geographically it lies in the southern part of Bačka and northern part of Syrmia. According to the 2022 census results, it has a population of 607,178 inhabitants. The administrative center of the district is the city of Novi Sad, which is also the capital and the largest city of the Autonomous Province of Vojvodina.

Bačka or Bácska is a geographical and historical area within the Pannonian Plain bordered by the river Danube to the west and south, and by the river Tisza to the east. It is divided between Serbia and Hungary. Most of the area is located within the Vojvodina region in Serbia and Novi Sad, the capital of Vojvodina, lies on the border between Bačka and Syrmia. The smaller northern part of the geographical area is located within Bács-Kiskun County in Hungary.