Zabaykalsky District (Russian: Забайка́льский райо́н) is an administrative[1] and municipal[6] district (raion), one of the thirty-one in Zabaykalsky Krai, Russia.

It is located in the southeast of the krai, and borders with Borzinsky District in the north, Krasnokamensky District in the east, District in the south, and with District in the west.

The area of the district is 5,100 square kilometers (2,000 sq mi).

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

[3] The district was established on January 2, 1967.