| En Name: | Bolshebereznikovsky District |
| Ru Name: | Большеберезниковский район |
| Loc Name1: | Покш Килейбуе |
| Loc Lang1: | Erzya |
| Loc Name2: | Оцю Келунонь аймак |
| Loc Lang2: | Moksha |
| Image View: | Gosagyr vele.jpg |
| Coordinates: | 54.1833°N 103°W |
| Federal Subject: | Republic of Mordovia |
| Adm Data As Of: | June 2015 |
| Adm Ctr Type: | selo |
| Adm Ctr Name: | Bolshiye Berezniki |
| Selsoviet Type1: | Selsoviets |
| No Of Selsoviets Type1: | 15 |
| No Of Rural Localities: | 35 |
| Mun Data As Of: | October 2009 |
| Mun Formation1: | Bolshebereznikovsky Municipal District |
| Mun Formation1 No Of Urban Settlements: | 0 |
| Mun Formation1 No Of Rural Settlements: | 15 |
| Area Km2: | 957.7 |
| Pop 2010Census: | 14072 |
| Urban Pop 2010Census: | 0% |
| Rural Pop 2010Census: | 100% |
| Website: | https://bberezniki.gosuslugi.ru/ |
| Date: | January 2024 |
| Population of Bolshebereznikovsky District | |
| Label1: | 2010 Census |
| Data1: | 14,072 |
| Label2: | 2002 Census |
| Data2: | 15,584 |
| Label3: | 1989 Census |
| Data3: | 19,113 |
| Label4: | 1979 Census |
| Data4: | 24,310 |
Bolshebereznikovsky District (ru|Большеберезнико́вский райо́н; myv|Покш Килейбуе, Pokš Kilejbuje; mdf|Оцю Келунонь аймак, Otsü Kelunoń ajmak) is an administrative[1] and municipal[2] district (raion), one of the twenty-two in the Republic of Mordovia, Russia. It is located in the southeast of the republic. The area of the district is 957.7km2.[3] Its administrative center is the rural locality (a selo) of Bolshiye Berezniki.[4] As of the 2010 Census, the total population of the district was 14,072, with the population of Bolshiye Berezniki accounting for 45.4% of that number.
Within the framework of administrative divisions, Bolshebereznikovsky District is one of the twenty-two in the republic. The district is divided into fifteen selsoviets which comprise thirty-five rural localities. As a municipal division, the district is incorporated as Bolshebereznikovsky Municipal District. Its fifteen selsoviets are incorporated into fifteen rural settlements within the municipal district. The selo of Bolshiye Berezniki serves as the administrative center of both the administrative and municipal district.