Tersky District is an administrative district (raion), one of the six in Murmansk Oblast, Russia. Municipally, it is incorporated as Tersky Municipal District. It is located in the south of the Kola Peninsula and borders the White Sea in the south. The area of the district is 19,300 square kilometers (7,500 sq mi). Its administrative center is the urban locality of Umba. District's population: 6,288 (2010 Russian census); 7,434 (2002 Census); 9,752 (1989 Soviet census). The population of Umba accounts for 88.0% of the district's total population.

Murmansk Oblast is a federal subject of Russia, located in the northwestern part of the country, with a total land area of 144,900 square kilometres (55,900 sq mi). Its only internal border is the Republic of Karelia to the south, as well is bordered internationally by Finland to the west and Norway to the northwest and the Barents Sea lies to the north and White Sea lies to the south and east. Its administrative center is the city of Murmansk. As of the 2010 Census, its population was 795,409, but at the 2021 Census this had declined to 667,744.