Tretyakovsky District (Russian: Третьяко́вский райо́н) is an administrative[1] and municipal[4] district (raion), one of the fifty-nine in Altai Krai, Russia.

It is located in the south of the krai.

The area of the district is 1,998 square kilometers (771 sq mi).

[2] Its administrative center is the rural locality (a selo) of Staroaleyskoye.

[7] The population of Staroaleyskoye accounts for 33.6% of the district's total population.