Gaginsky District (Russian: Га́гинский райо́н) is an administrative district (raion), one of the forty in Nizhny Novgorod Oblast, Russia.

[3] It is located in the southeast of the oblast.

The area of the district is 1,064.2 square kilometers (410.9 sq mi).

[1] Its administrative center is the rural locality (a selo) of Gagino.

[6] The population of Gagino accounts for 31.3% of the district's total population.