Little Diomede Island is located about 16 miles (25 km) west of mainland Alaska, in the middle of the Bering Strait.

According to the United States Census Bureau, the island has a total area of 2.8 sq mi (7.3 km2), all of it land.

Behind the settlement, and around the entire island, rocky slopes rise at about 40° up to the relatively flattened top in 1,148–1,191 ft (350–363 m).

The island, along with its surrounding waters, has been designated an Important Bird Area (IBA) by BirdLife International because of its significant seabird colonies, including those of black-legged kittiwakes, and of parakeet, least and crested auklets.

[10] During the Cold War, the section of the border between the USA and the USSR that separates Big and Little Diomede became known as the "Ice Curtain".

In the past, locals carved a runway into the thick ice sheet so that bush planes could deliver vital products, such as medicine and grocery supplies.

[14] The Diomede Islands are also featured in the novel Further Tales of the City, by Armistead Maupin, and the miniseries based on the book.

In addition, Alexander Armstrong visited the island as part of his 2015 series Land of the Midnight Sun.