Anadyr is a port town and the administrative center of Chukotka Autonomous Okrug, Russia, located at the mouth of the Anadyr River at the tip of a peninsula that protrudes into Anadyrsky Liman. It was previously known as Novo-Mariinsk. Anadyr is the easternmost town in Russia; more easterly settlements, such as Provideniya and Uelen, do not have town status.

Chukotka, officially the Chukotka Autonomous Okrug, is the easternmost federal subject of Russia. It is an autonomous okrug situated in the Russian Far East, and shares a border with the Republic of Sakha to the west, Magadan Oblast to the south-west, and Kamchatka Krai to the south, as well as a maritime border on the Bering Strait with the U.S. state of Alaska to the east. Anadyr is the largest town and the capital, and the easternmost settlement to have town status in Russia.