Mogoytuysky District (Russian: Могойтуйский райо́н; Buryat: Могойтын аймаг, Mogoityn aimag) is an administrative[1] and municipal[5] district (raion) of Agin-Buryat Okrug of Zabaykalsky Krai, Russia, one of the thirty-one in the krai, and borders with Shilkinsky District in the north, Olovyanninsky District in the east, Ononsky District in the south, and with Aginsky District in the west.

The area of the district is 6,300 square kilometers (2,400 sq mi).

[2] Its administrative center is the urban locality (an urban-type settlement) of Mogoytuy.

[9] The population of Mogoytuy accounts for 37.3% of the district's total population.

[3] The district was established on December 8, 1942.