Serdobsky District (Russian: Сердо́бский райо́н) is an administrative[1] and municipal[4] district (raion), one of the twenty-seven in Penza Oblast, Russia.

It is located in the southwest of the oblast.

The area of the district is 1,695 square kilometers (654 sq mi).

[2] Its administrative center is the town of Serdobsk.

[7] The population of Serdobsk accounts for 64.9% of the district's total population.