The Declaration of State Sovereignty of the Russian SFSR (Russian: Декларация о государственном суверенитете РСФСР, tr. Deklaratsiya o gosudarstvennom suverenitete RSFSR) was a political act of the Russian SFSR (Russian Soviet Federative Socialist Republic), then part of the Soviet Union, which marked the beginning of constitutional reform in Russia. The Declaration was adopted by the First Congress of People's Deputies of the Russian SFSR on 12 June 1990. It proclaimed the sovereignty of the Russian SFSR and the intention to establish a democratic constitutional state within a liberalized Soviet Union. The declaration also states the following:
The declaration was signed by then Chairman of the Presidium of the Supreme Soviet of the Russian SFSR, Boris Yeltsin.
The day of the declaration, 12 June, has been celebrated as Russia Day, the national holiday in the Russian Federation, since 1992.