Coordinates: 54°42′23.52″N 167°43′2.23″E / 54.7065333°N 167.7172861°E
Medny Island (Russian: о́стров Ме́дный), also spelled Mednyy or Mednyi, sometimes called Copper Island in English, is the smaller (after Bering Island) of the two main islands in the Commander Islands in the North Pacific Ocean, east of Kamchatka, Russia. (The other fifteen are better described as islets and rocks.) These islands belong to the Kamchatka Krai of the Russian Federation.
The island was uninhabited until the early 20th century, when Aleuts came from Attu Island in the Aleutian Islands to Medny Island.
The island is 56 km long and between 5 and 7 km wide and its area is 186 km². Its maximum elevation is 640 m and the average annual temperature is +2.8 °C. About 100 meters off the northwestern end of the islands are the Beaver Stones (Бобровые камни in Russian), two islets connected by an isthmus, with a combined length of 1 km.
The island was sighted by on 5 November 1741 by Bering and his crew while returning from the expedition during which he found America from the west, but he did not land on this island.