Vajska
Vajska 
     | |
|---|---|
Labudnjača  | |
Map of Vajska and other settlements in the neighborhood  | |
| Coordinates: 45°25′N 19°07′E / 45.417°N 19.117°E | |
| Country | Serbia | 
| Province | Vojvodina | 
| Region | Bačka (Podunavlje) | 
| District | South Bačka | 
| Municipality | Bač | 
| Population  (2011)  | |
 • Total  | 2,834 | 
| Time zone | UTC+1 (CET) | 
| • Summer (DST) | UTC+2 (CEST) | 
Vajska (Serbian Cyrillic: Вајска ⓘ; Romanian: Vaisca) is a village in Serbia. It is situated in the Bač municipality, in the South Bačka District, Vojvodina province. Two neighbouring settlements, Labudnjača (Serbian Cyrillic: Лабудњача; 45°27′N 19°02′E / 45.450°N 19.033°E) and Živa, are also officially regarded as parts of Vajska although they are physically separated from it. The name Labudnjača is derived from Serbian labud 'swan'.