| En Name: | Atyashevsky District |
| Ru Name: | Атяшевский район |
| Loc Name1: | Отяжбуе |
| Loc Lang1: | Erzya |
| Loc Name2: | Атяшевань аймак |
| Loc Lang2: | Moksha |
| Image View: | Вид на Атяшевский район.jpg |
| Coordinates: | 54.5833°N 52°W |
| Federal Subject: | Republic of Mordovia |
| Adm Data As Of: | June 2015 |
| Adm Ctr Type: | work settlement |
| Adm Ctr Name: | Atyashevo |
| Urban-Type Settlement Of District Significance Type: | Work settlements |
| No Of Urban-Type Settlements Of District Significance: | 1 |
| Selsoviet Type1: | Selsoviets |
| No Of Selsoviets Type1: | 18 |
| No Of Urban-Type Settlements: | 1 |
| No Of Rural Localities: | 57 |
| Mun Data As Of: | September 2014 |
| Mun Formation1: | Atyashevsky Municipal District |
| Mun Formation1 No Of Urban Settlements: | 1 |
| Mun Formation1 No Of Rural Settlements: | 18 |
| Area Km2: | 1095.8 |
| Pop 2010Census: | 20161 |
| Urban Pop 2010Census: | 31.0% |
| Rural Pop 2010Census: | 69.0% |
| Website: | http://www.atyashevorm.ru |
| Date: | October 2012 |
| Population of Atyashevsky District | |
| Label1: | 2010 Census |
| Data1: | 20,161 |
| Label2: | 2002 Census |
| Data2: | 22,889 |
| Label3: | 1989 Census |
| Data3: | 27,220 |
| Label4: | 1979 Census |
| Data4: | 32,741 |
Atyashevsky District (Russian: Атя́шевский райо́н; Erzya: Отяжбуе, Otäžbuje; Moksha: Атяшевань аймак, Atäševań 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 east of the republic. The area of the district is 1095.8km2.[3] Its administrative center is the urban locality (a work settlement) of Atyashevo.[4] As of the 2010 Census, the total population of the district was 20,161, with the population of Atyashevo accounting for 31.0% of that number.
Within the framework of administrative divisions, Atyashevsky District is one of the twenty-two in the republic. It is divided into one work settlement (an administrative division with the administrative center in the work settlement (inhabited locality) of Atyashevo), and eighteen selsoviets, all of which comprise fifty-seven rural localities. As a municipal division, the district is incorporated as Atyashevsky Municipal District. Atyashevo Work Settlement is incorporated into an urban settlement, and the eighteen selsoviets are incorporated into eighteen rural settlements within the municipal district. The work settlement of Atyashevo serves as the administrative center of both the administrative and municipal district.