Bolshebereznikovsky District (Russian: Большеберезнико́вский райо́н; Erzya: Покш Килейбуе, Pokš Kilejbuje; Moksha: Оцю Келунонь аймак, Otsü Kelunoń ajmak) is an administrative[1] and municipal[5] district (raion), one of the twenty-two in the Republic of Mordovia, Russia.

The area of the district is 957.7 square kilometers (369.8 sq mi).

[3] Its administrative center is the rural locality (a selo) of Bolshiye Berezniki.

[4] Within the framework of administrative divisions, Bolshebereznikovsky District is one of the twenty-two in the republic.

[1] The district is divided into fifteen selsoviets which comprise thirty-five rural localities.