| En Name: | Sengileyvsky District |
| Ru Name: | Сенгилеевский район |
| Image View: | Sengiley rayon administration.JPG |
| Coordinates: | 53.9667°N 96°W |
| Image Coa: | Coat of arms of Sengileyevsky Raion.png |
| Federal Subject: | Ulyanovsk Oblast |
| Adm Data As Of: | July 2012 |
| Adm Ctr Type: | town |
| Adm Ctr Name: | Sengiley |
| Town Of District Significance Type: | Towns of district significance |
| No Of Towns Of District Significance: | 1 |
| Urban-Type Settlement Of District Significance Type: | Settlement okrugs |
| No Of Urban-Type Settlements Of District Significance: | 2 |
| Selsoviet Type1: | Rural okrugs |
| No Of Selsoviets Type1: | 3 |
| No Of Cities Towns: | 1 |
| No Of Urban-Type Settlements: | 3 |
| No Of Rural Localities: | 27 |
| Mun Data As Of: | July 2012 |
| Mun Formation1: | Sengileyevsky Municipal District |
| Mun Formation1 No Of Urban Settlements: | 3 |
| Mun Formation1 No Of Rural Settlements: | 3 |
| Area Km2: | 1349 |
| Pop 2010Census: | 23260 |
| Urban Pop 2010Census: | 60.6% |
| Rural Pop 2010Census: | 39.4% |
| Website: | http://sengilej.3dn.ru/ |
| Date: | April 2013 |
Sengileyevsky District (ru|Сенгилеевский райо́н) is an administrative[1] and municipal[2] district (raion), one of the twenty-one in Ulyanovsk Oblast, Russia. It is located in the center of the oblast. The area of the district is 1349km2.[3] Its administrative center is the town of Sengiley. Population: 23,260 (2010 Census); The population of Sengiley accounts for 29.9% of the district's total population.