On July 15, 1929, the uyezds were abolished, the governorates merged into Northern Krai, and Plesetsky District was established.

The urban-type settlement of Obozersky was established by the Decree of the Presidium of the Russian SFSR Supreme Soviet on September 12, 1957.

This railroad was built during World War II to secure the transport of goods from the harbor of Murmansk to Moscow.

Obozersky is located on the federal road A215 (Brin Navolok - Lodeinoe Pole) connecting Kargopol, Brin Navolok and SPB with one of the principal highways in Russia, M8 between Moscow and Arkhangelsk (the highways meet in the village of Brin-Navolok).

This is the historic trading route which connected Kargopol with Arkhangelsk before the railroad was built, and long stretches of this road are still unpaved.