The 1980 Summer Olympics, officially known as the Games of the XXII Olympiad and commonly known as Moscow 1980, were an international multi-sport event held from 19 July to 3 August 1980 in Moscow, Soviet Union, in present-day Russia. The games were the first to be staged in an Eastern Bloc country, as well as the first Olympic Games and only Summer Olympics to be held in a Slavic language-speaking country. They were also the only Summer Olympic Games to be held in a socialist state until the 2008 Summer Olympics held in China. These were the final Olympic Games under the IOC Presidency of Michael Morris, 3rd Baron Killanin, before he was succeeded by Juan Antonio Samaranch.

Moscow is the capital and largest city of Russia. The city stands on the Moskva River in Central Russia, with a population estimated at over 13 million residents within the city limits, over 18.8 million residents in the urban area, and over 21.5 million residents in its metropolitan area. The city covers an area of 2,511 square kilometers (970 sq mi), while the urban area covers 5,891 square kilometers (2,275 sq mi), and the metropolitan area covers over 26,000 square kilometers (10,000 sq mi). Moscow is among the world's largest cities, being the most populous city in its entirety in Europe, the largest urban and metropolitan area in Europe, and the largest city by land area on the European continent.