Alaska
Alaska - Western Russia is just across the Bering Strait.
Russia.The Diomede islands in the Bering Strait are separated by 2.4 miles. East Diomede Island is part of the state of Alaska, and West Diomede is governed by the Far Eastern Federal District of Russia.
The Bering Strait separates Russia and the US.
Alaska
Its the Bering Strait. The Bering Strait and Bering Sea separate the landmasses of Asia and North America, as well as forming the international boundary between Russia and the United States. This national and continental boundary separates the Diomede Islands in the Bering Strait, with Big Diomede in Russia and Little Diomede in the US.
The closest state to Siberia is the US State of Alaska." The Bering Strait seperates Siberia & the "Fairbanks" peninsula. When you look at the map of Siberia facing the Fairbanks Peninsula you'll notice that the middle of those peninsula look like medium-sized prehistoric mammal noses.
Alaska is the US state that is separated from Russia across the Bering Straits.
The strait between Russia and Alaska is the Bering Strait. At its narrowest point, it is 51 miles wide, between Cape Dezhnev and Cape Prince of Wales.
Bering Sea
Russia - approximately 25 miles across the Bering Strait to the Diomede Islands, Russia, or 50 miles to mainland Russia.
Russia is closest. Siberia's easternmost point is just fifty-six miles from Alaska. Actually, in the middle of the Bering Strait, Russia's Big Diomede Island and Alaska's Little Diomede Island are only two miles apart!