Mir (Russian: Мир; lit. Peace or World) was a Soviet and later Russian space station. It was the world's first consistently inhabited long-term research station in space, and the first of the third generation type of space station, constructed from 1986 to 1996 with a modular design. The station was in operation for fifteen years until March 23, 2001, when it was deliberately de-orbited, breaking apart during atmospheric re-entry over the South Pacific Ocean.

The station currently holds the record for the longest continuous manned presence in space, at eight days short of ten years, and was occupied for a total of twelve and a half years of its fifteen-year lifespan. Mir had the capacity to support a resident crew of three but could also support larger crews for short-term visits, the largest crew simultaneously aboard the station being six.

Through a number of international collaborations, including Intercosmos and the Shuttle-Mir Programme, the station was made accessible to astronauts from the U.S., several western European nations, Japan as well as cosmonauts from various eastern nations. The Mir also marked the beginning of Space tourism when Japanese journalist Akiyama made a paid visit in 1990.