The area of the district is 34,560 square kilometers (13,340 sq mi).

[3] Its administrative center is the rural locality (a selo) of imeni Poliny Osipenko.

In the western part rise the Yam-Alin, Dusse-Alin, Etkil-Yankansky, Mevadzha and Koltoursky ranges; in the eastern part, parallel to the Amgun River, rise the Kivun, Omal, Omeldin and Chayatyn ranges.

[10] The main rivers of the district are the Amgun and its tributaries Nimelen, Nilan and Semi, as well as the Oldzhikan, Uda and Somnia (Сомня).

The Amgun is navigable from the mouth to imeni Poliny Osipenko village.