| En Name: | Ust-Ilimsky District |
| Ru Name: | Усть-Илимский район |
| Image View: | ОАО Русь2.jpg |
| Coordinates: | 57.9833°N 146°W |
| Federal Subject: | Irkutsk Oblast |
| Adm Data As Of: | October 2016 |
| Adm Ctr Type: | town |
| Adm Ctr Name: | Ust-Ilimsk |
| No Of Urban-Type Settlements: | 1 |
| No Of Rural Localities: | 11 |
| Counts Ref: | [1] |
| Mun Data As Of: | January 2017 |
| Mun Formation1: | Ust-Ilimsky Municipal District |
| Mun Formation1 No Of Urban Settlements: | 1 |
| Mun Formation1 No Of Rural Settlements: | 7 |
| Area Km2: | 36600 |
| Pop 2010Census: | 18589 |
| Urban Pop 2010Census: | 37.8% |
| Rural Pop 2010Census: | 62.2% |
| Established Date: | 1968 |
| Website: | http://uiraion.irkobl.ru |
| Date: | July 2017 |
| Bodystyle: | width:23.5em |
| Population of Ust-Ilimsky District | |
| Label1: | 2010 Census |
| Data1: | 18,589 |
| Label2: | 2002 Census |
| Data2: | 21,154 |
| Label3: | 1989 Census |
| Data3: | 25,832 |
| Label4: | 1979 Census |
| Data4: | 26,135 |
Ust-Ilimsky District (Russian: Усть-Или́мский райо́н) is an administrative district, one of the thirty-three in Irkutsk Oblast, Russia.[2] Municipally, it is incorporated as Ust-Ilimsky Municipal District.[3] It is located in the north of the oblast. The area of the district is 36600km2.[4] Its administrative center is the town of Ust-Ilimsk[5] (which is not administratively a part of the district). As of the 2010 Census, the total population of the district was 18,589.
Within the framework of administrative divisions, Ust-Ilimsky District is one of the thirty-three in the oblast. The town of Ust-Ilimsk serves as its administrative center, despite being incorporated separately as an administrative unit with the status equal to that of the districts.
As a municipal division, the district is incorporated as Ust-Ilimsky Municipal District. The Town of Ust-Ilimsk is incorporated separately from the district as Ust-Ilimsk Urban Okrug.[6]