Kolyma or Kolyma Krai is a historical region in the Russian Far East that includes the basin of Kolyma River and the northern shores of the Sea of Okhotsk, as well as the Kolyma Mountains. It is bounded to the north by the East Siberian Sea and the Arctic Ocean, and by the Sea of Okhotsk to the south. Kolyma Krai was never formally defined and over time it was split among various administrative units. As of 2023, it consists roughly of the Magadan Oblast, north-eastern areas of Yakutia, and the Bilibinsky District of Chukotka Autonomous Okrug.

The Gulag was a system of forced labor camps in the Soviet Union. The word Gulag originally referred only to the division of the Soviet secret police that was in charge of running the forced labor camps from the 1930s to the early 1950s during Joseph Stalin's rule, but in English literature the term is popularly used for the system of forced labor throughout the Soviet era. The abbreviation GULAG (ГУЛАГ) stands for "Гла́вное Управле́ние исправи́тельно-трудовы́х ЛАГере́й", but the full official name of the agency changed several times.