| En Name: | Kozlovsky District |
| Ru Name: | Козловский район |
| Loc Name1: | Куславкка районӗ |
| Loc Lang1: | Chuvash |
| Image View: | Tyurlema near the railway station.jpg |
| Coordinates: | 55.815°N 47.818°W |
| Image Coa: | Герб Козловского района (Чувашия).png |
| Federal Subject: | Chuvash Republic |
| Adm Data As Of: | December 2011 |
| Adm Ctr Type: | town |
| Adm Ctr Name: | Kozlovka |
| Town Of District Significance Type: | Urban settlements |
| No Of Towns Of District Significance: | 1 |
| Selsoviet Type1: | Rural settlements |
| No Of Selsoviets Type1: | 9 |
| No Of Cities Towns: | 1 |
| No Of Rural Localities: | 67 |
| Mun Data As Of: | November 2011 |
| Mun Formation1: | Kozlovsky Municipal District |
| Mun Formation1 No Of Urban Settlements: | 1 |
| Mun Formation1 No Of Rural Settlements: | 9 |
| Area Km2: | 516.8 |
| Pop 2010Census: | 21649 |
| Urban Pop 2010Census: | 47.8% |
| Rural Pop 2010Census: | 52.2% |
| Website: | http://gov.cap.ru/main.asp?govid=65 |
| Date: | October 2011 |
Kozlovsky District (Russian: Козло́вский райо́н; Chuvash: Куславкка районӗ, Kuslavkka rayonĕ) is an administrative[1] and municipal[2] district (raion), one of the twenty-one in the Chuvash Republic, Russia. It is located in the northeast of the republic and borders with the Republic of Tatarstan in the east and southeast, Urmarsky District in the west and southwest, Tsivilsky District in the west, and with Mariinsky District in the northwest. The area of the district is 516.8km2.[3] Its administrative center is the town of Kozlovka Population: The population of Kozlovka accounts for 47.8% of the district's total population.