Administrative divisions of Agin-Buryat Autonomous Okrug

Agin-Buryat Autonomous Okrug was a federal subject of Russia until February 29, 2008.

On March 1, 2008, it was merged with Chita Oblast to form Zabaykalsky Krai.

During the transitional period of 2008–2009, it retained a special status within Zabaykalsky Krai.