The Armenian Soviet Socialist Republic, also commonly referred to as Soviet Armenia or Armenia was one of the constituent republics of the Soviet Union in December 1922 located in the South Caucasus region of Eurasia. It was established in December 1920, when the Soviets took over control of the short-lived First Republic of Armenia, and lasted until 1991. Historians sometimes refer to it as the Second Republic of Armenia, following the demise of the First Republic.

As part of the Soviet Union, the Armenian SSR transformed from a largely agricultural hinterland to an important industrial production center, while its population almost quadrupled from around 880,000 in 1926 to 3.3 million in 1989 due to natural growth and large-scale influx of Armenian genocide survivors and their descendants. On 23 August 1990 the Declaration of Independence of Armenia was adopted. On 21 September 1991, the independence of the Republic of Armenia was confirmed in a referendum. It was recognized on 26 December 1991 with the dissolution of the Soviet Union.