Nizhneilimsky District () is an administrative district, one of the thirty-three in Irkutsk Oblast, Russia. Municipally, it is incorporated as Nizhneilimsky Municipal District. The area of the district is . Its administrative center is the town of Zheleznogorsk-Ilimsky. Population: 63,727 (2002 Census);
Within the framework of administrative divisions, Nizhneilimsky District is one of the thirty-three in the oblast. The town of Zheleznogorsk-Ilimsky serves as its administrative center.
As a municipal division, the district is incorporated as Nizhneilimsky Municipal District.