The Chuvash Republic (Russian: Чува́шская Респу́блика — Чува́шия; Chuvash: Чăваш Республики — Чăваш Ен), or Chuvashia (Чува́шия) for short, is a federal subject of Russia (a republic). It is the homeland of the Chuvash people. Its capital is the city of Cheboksary. Population: 1,251,619 (2010 Census).

The Chuvash Republic is located in the center of the European part of Russia, in the heart of the Volga-Vyatka region, midway between Nizhny Novgorod and Kazan. The republic is not large, but is one of the most densely populated regions in the Russian Federation, with a total population of 1.35 million.

It is bordered by the Mari El Republic in the north, Nizhny Novgorod Oblast in the west, the Republic of Mordovia in the southwest, Ulyanovsk Oblast in the south, and the Republic of Tatarstan in the east and southeast. Some of the Volga River valley reservoirs are in the north of the republic, and the Sura River flows towards the Volga along much of the republic's western boundary. The republic's central location gives companies located here access to some of the most industrially developed regions of the country.