Oblasts of Russia in the context of "Lake Baikal"

The federal subjects of Russia, also referred to as the subjects of the Russian Federation (Russian: субъекты Российской Федерации, romanized: subyekty Rossiyskoy Federatsii) or simply as the subjects of the federation (Russian: субъекты федерации, romanized: subyekty federatsii), are the constituent entities of Russia, its top-level political divisions. According to the Constitution of Russia, the federation consists of republics, krais, oblasts, cities of federal importance, an autonomous oblast, and autonomous okrugs, all of which are equal subjects of the federation.

Every federal subject has its own head, a parliament, and a constitutional court. Each subject has its own constitution or charter and legislation, although the authority of these organs differ. Subjects have equal rights in relations with federal government bodies. The subjects have equal representation – two delegates each – in the Federation Council, the upper house of the Federal Assembly. They differ in the degree of autonomy they enjoy; republics are offered more autonomy.

Autonomous okrugs, (Russian: автономный округ, romanized: avtonomnyy okrug) which are also referred to as "autonomous districts" or "autonomous areas" are a type of federal subject of the Russian Federation and simultaneously an administrative division type of some federal subjects. As of 2024, Russia has four autonomous okrugs of its 83 federal subjects. The Chukotka Autonomous Okrug is the only okrug which is not subordinate to an oblast. The Nenets Autonomous Okrug is a part of Arkhangelsk Oblast, the Khanty-Mansi Autonomous Okrug and the Yamalo-Nenets Autonomous Okrug are parts of Tyumen Oblast.

According to the Constitution of the Soviet Union, in case of a union republic voting on leaving the Soviet Union, autonomous republics, autonomous oblasts, and autonomous okrugs had the right, by means of a referendum, to independently resolve whether they will stay in the USSR or leave with the seceding union republic, as well as to raise the issue of their state-legal status.

Tatarstan, officially the Republic of Tatarstan, sometimes also called Tataria, is a republic of Russia located in Eastern Europe. It is a part of the Volga Federal District; and its capital and largest city is Kazan, an important cultural centre in Russia. The region's main source of wealth is oil with a strong petrochemical industry.

The republic borders the oblasts of Kirov, Ulyanovsk, Samara and Orenburg, as well as the republics of Mari El, Udmurtia, Chuvashia and Bashkortostan. Tatarstan has strong cultural, linguistic and ethnic ties with its eastern neighbour, Bashkortostan, which is also a republic of Russia. The area of Tatarstan is 68,000 square kilometres (26,000 sq mi), occupying 0.4% of the total surface of the country. As of the 2021 Census, the population of Tatarstan was 4,004,809.

A krai (Russian: край, romanized: kray, IPA: [krai], lit. 'region, edge') is a type of federal subject of the Russian Federation. The country is divided into 85 federal subjects, of which nine are krais. Oblasts, another type of federal subject, are legally identical to krais and the difference between a political entity with the name "krai" or "oblast" is purely traditional; both are constituent entities equivalent in legal status in Russia with representation in the Federation Council. During the Soviet era, the autonomous oblasts could be subordinated to republics or krais, but not to oblasts. Outside of political terminology, both words have a very similar general meaning ("region" or "area" in English) and can often be used interchangeably. When a distinction is desirable, "krai" is sometimes translated into English as "territory", (closer to "edge" in literal translation, what is more related with the March meaning as a "borderland") while "oblast" can variously be translated to "province" or "region", but both of these translations are also reasonable interpretations of "krai".

The regional parliaments of Russia are the regional legislatures in the federal subjects of Russia (republics, krais, oblasts, autonomous oblasts and federal cities), which have different names but are often collectively referred to as regional parliaments.

The federal structure of Russia includes 85 regional parliaments. The largest regional parliament is the State Assembly of the Republic of Bashkortostan, which consists of 110 deputies, while the smallest one is the Duma of Chukotka Autonomous Okrug, which consists of 15 deputies. Currently, deputies in the regional parliaments are elected for five-year terms.

The Federation Council, unofficially the Senate, is the upper house of the Federal Assembly of Russia, with the lower house being the State Duma. It was established by the Constitution of the Russian Federation in 1993.

Each of the 89 federal subjects of Russia (including two annexed in 2014 and four more in 2022, which are not recognized by the international community), consisting of 24 republics, 48 oblasts, nine krais, three federal cities, four autonomous okrugs, and one autonomous oblast, sends two senators to the Council, for a total membership of 178 Senators. In addition, the Constitution also provides for senators from the Russian Federation, which can be no more than 30 (up to seven of them for life), as well as (optionally) former presidents as life senators (as of 2020 there are no such life senators).