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

It is located in the northwest of the oblast.

The area of the district is 1,040 square kilometers (400 sq mi).

[2] Its administrative center is the rural locality (a selo) of Vadinsk.

[7] The population of Vadinsk accounts for 49.9% of the district's total population.