Neryungrinsky District (Russian: Нерюнгри́нский улу́с; Yakut: Нүөрүҥгүрү улууһа, Nüörüŋgürü uluuha, Yakut pronunciation: [nyøɾyŋgyɾy uluːha]) is an administrative and municipal district (raion, or ulus), one of the thirty-four in the Sakha Republic, Russia. It is the southernmost district of Sakha and borders Aldansky District in the north, Olyokminsky District in the west and south, Amur Oblast and a small area of Zabaykalsky Krai in the west, and Khabarovsk Krai in the east. The area of the district is 98,900 square kilometers (38,200 sq mi). Its administrative center is the town of Neryungri. Population (excluding the administrative center): 21,019 (2010 census).

The landscape of the district is mostly mountainous. The Toko-Stanovik range and lake Bolshoye Toko are located in the eastern part. The main river in the district is the Aldan with its tributaries the Timpton and the Chulman. Lake Bolshoye Toko is the deepest lake in Yakutia.

Average January temperature ranges from −30 °C (−22 °F) to −34 °C (−29 °F) and average July temperature ranges from +12 °C (54 °F) to +14 °C (57 °F). Annual precipitation is 400–500 millimeters (16–20 in).

The district was established on November 6, 1975.

As of the 2021 Census, the ethnic composition was as follows:

There are deposits of gold, coal, iron ore, molybdenum, and construction materials in the district.

The district includes seven municipal divisions, covering a total of nine inhabited locations.

Divisional source:
Population source:
*Administrative centers are shown in bold