Petrovsk-Zabaykalsky District (Russian: Петро́вск-Забайка́льский райо́н) is an administrative district (raion), one of the thirty-one in Zabaykalsky Krai, Russia.

The area of the district is 8,700 square kilometers (3,400 sq mi).

[1] Within the framework of administrative divisions, Petrovsk-Zabaykalsky District is one of the thirty-one in the krai.

[1] The town of Petrovsk-Zabaykalsky serves as its administrative center.

[1] As a municipal division, the territory of the district is split between two municipal formations—Petrovsk-Zabaykalsky Municipal District,[6] to which three urban-type settlements and twenty-two of the administrative district's rural localities belong,[12] and Petrovsk-Zabaykalsky Urban Okrug,[6] which covers the rest of the administrative district's territory, including the town of Petrovsk-Zabaykalsky.