Mirny is a town and the administrative centre of Mirninsky district of the Sakha (Yakutiya) republic. The town is located in the west of Yakutiya, on the Irelyakh River. It was founded in 1955 after the discovery of a nearby Mir kimberlite pipe and named after it. Open-cut diamond mining in the Mir pit started in 1957 and lasted until 2001. At the end the pit became one of the largest in the world. In 1959 Mirny was granted town status, and today it is often named "the diamond capital of Russia".
Mirny is the centre of the OJSC ALROSA company, which is engaged in the exploration, mining, manufacture and sale of diamonds. Mirny is home to the unique kimberlite museum, the OJSC ALROSA historical and industrial museum, and to the diamond sorting centre. The town also hosts the Assembly of the Peoples, uniting 16 national and historic societies.