Northern Asia or North Asia is sometimes called the sub region of Asia which only consists of the Asian portion of Russia. Usually, the term North Asia is used to identify parts of Eastern Asia which is part of Eastern Europe.

Northern Asia is also defined as being most of the former USSR, which is part of the Ural Mountains. A definition that predates the USSR is that it is the two great administrative divisions of East and West Siberia, whose capitals are Irkutsk and Omsk. It comprised almost 1/3 of the entire continent, and, with few exceptions, is administered directly by Russia.
In 1875, it was reported that the population of Northern Asia was 8,000,000. Between 1801 and 1914 an estimated 7,000,000 settlers moved to Siberia from European Russia, with 85% of them moving during the quarter century before World War I.

Current estimates are that there are about 40,000,000 Russians and Ukrainianís who live east of the Ural Mountains. The Buryat people number approximately 445,175, which means that they are the largest minority ethnic group in Siberia. There are approximately 443,852 Yakuts and approximately 400,000 ethnic Germans who live in Siberia. There are approximately 500,000 Tatars located in Siberia. There are an estimated 1,000,000 Chinese in the Russian Far East.

There are no chains of mountains in Northern Asia to preclude the air currents from the Arctic which flows down over the plains of Turkestan and Siberia. The plains and plateaus of Northern Asia make up the Tunguska Plateau, the Anabar Plateau, the coastal lowlands, the Taimyr Peninsula, the Angara Shield and the West Siberian lowlands.

In order to compensate for the new seabed floor which was made in the basin of Siberia, the entire Asian Plate causes compressions in the Verkhoyansk Mountains. The southern boundary is the northern margin of the Alpine folds of Bhutan, Nepal, India, Afghanistan and Iran, which is at the east of Brahmaputa and runs south towards the Bengal Bay along the line of the Arakan Yoma, and then continues around Indonesia following the edge of the continental shelf along the eastern seaboard of China. The North American Plate and the Eurasian Plate meet across the neck of Alaska and follow the Aleutian Trench instead of ending at the Bering Straits.