Tattinsky District (Russian: Таттинский улу́с; Yakut: Таатта улууһа, Taatta uluuha) is an administrative[1] and municipal[5] district (raion, or ulus), one of the thirty-four in the Sakha Republic, Russia.

The area of the district is 19,000 square kilometers (7,300 sq mi).

[3] Its administrative center is the rural locality (a selo) of Ytyk-Kyuyol.

Its main rivers include the Amga, the Aldan and the Tatta, a tributary of the latter.

[10] As of the 2021 Census, the ethnic composition was as follows:[11] The economy of the district is mostly based on agriculture.