Novosergiyevsky District (Russian: Новосергиевский райо́н) is an administrative[1] and municipal[5] district (raion), one of the thirty-five in Orenburg Oblast, Russia.

It is located in the center of the oblast.

The area of the district is 4,500 square kilometers (1,700 sq mi).

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

[8] As of the 2010 Census, the ethnic composition of the population was as follows:[9]