Pervomaysky District (Russian: Первома́йский райо́н; Kazakh: Первомай ауданы, Permovaı aýdany) is an administrative[1] and municipal[5] district (raion), one of the thirty-five in Orenburg Oblast, Russia.

It is located in the southwest of the oblast.

The area of the district is 5,055 square kilometers (1,952 sq mi).

[3] Its administrative center is the rural locality (a settlement) of Pervomaysky.

[8] The population of the administrative center accounts for 24.8% of the total district's population.