The Namyndykan, Seymchan, Buyunda, Korkodon, Bulun, and their tributaries flow across the district.

[1] The urban locality (an urban-type settlement) of Seymchan serves as its administrative center.

[1] As a municipal division, the district has been incorporated as Srednekansky Urban Okrug since January 9, 2015.

The main industries of the district are gold, silver, tin, cobalt, bismuth, tungsten, lead, zinc, and coal mining.

In addition, under the protection of the mountain ranges, the area in the valley of the Kolyma River lends itself for agricultural production.