Petrovsky District () is an administrative district (raion), one of the twenty-six in Stavropol Krai, Russia. Municipally, it is incorporated as Petrovsky Municipal District. It is located in the center of the krai. The area of the district is . Its administrative center is the town of Svetlograd. Population: 82,449 (2002 Census); 76,718 (1989 Census). The population of Svetlograd accounts for 49.3% of the district's total population.