Megino-Kangalassky District is an administrative and municipal district, one of the thirty-four in the Sakha Republic, Russia. It is located in the central part of the republic, on the Lena River opposite Yakutsk, the capital of the republic. The area of the district is 11,700 square kilometers (4,500 sq mi). Its administrative center is the rural locality of Mayya. As of the 2010 Census, the total population of the district was 31,278, with the population of Mayya accounting for 23,.3% of that number.

Sakha, officially the Republic of Sakha (Yakutia), is the largest republic of Russia, located in the Russian Far East, along the Arctic Ocean, with a population of one million. Sakha comprises half of the area of its governing Far Eastern Federal District, and is the world's largest country subdivision, covering over 3,083,523 square kilometers (1,190,555 sq mi). Yakutsk, which is the world's coldest major city, is its capital and largest city.