Administrative divisions of Russia

Russia is divided into several types and levels of subdivisions.

Since March 18, 2014, the Russian Federation consisted of eighty-five federal subjects that are constituent members of the Federation. However, two of these federal subjects—the Republic of Crimea and the federal city of Sevastopol—are internationally recognized as part of Ukraine. All federal subjects are of equal federal rights in the sense that they have equal representation—two delegates each—in the Federation Council (upper house of the Federal Assembly). They do, however, differ in the degree of autonomy they enjoy.

There are 6 types of federal subjects—22 republics, 9 krais, 46 oblasts, 3 federal cities, 1 autonomous oblast, and 4 autonomous okrugs.

Autonomous okrugs are the only ones that have a peculiar status of being federal subjects in their own right, yet at the same time they are considered to be administrative divisions of other federal subjects (with Chukotka Autonomous Okrug being the only exception).

On March 18, 2014, as a part of the 2014 Crimean crisis events and following the establishment of the Republic of Crimea (an independent entity recognized only by Russia), a treaty was signed between Russia and the Republic of Crimea incorporating the Republic of Crimea and the City of Sevastopol as the constituent members of the Russian Federation. According to the Treaty, the Republic of Crimea is accepted as a federal subject with the status of a republic while the City of Sevastopol has received federal city status. Neither the Republic of Crimea nor the city of Sevastopol are politically recognized as parts of Russia by most countries.

...
Wikipedia