Onega (Оне́га) is a town in the northwest of Arkhangelsk Oblast, Russia, situated at the mouth of the Onega River, a few kilometers from the shore of the Onega Bay of the White Sea. Population: 21,359 (2010 Russian census); 23,430 (2002 Census); 26,070 (1989 Soviet census).

Arkhangelsk Oblast is a federal subject of Russia. It includes the Arctic archipelagos of Franz Josef Land and Novaya Zemlya, as well as the Solovetsky Islands in the White Sea. Arkhangelsk Oblast also has administrative jurisdiction over the Nenets Autonomous Okrug (NAO). Including the NAO, Arkhangelsk Oblast has an area of 587,400 square kilometres (226,800 sq mi), it's the largest of first-level administrative divisions in Europe. Its population was 1,227,626 as of the 2010 Census.