Coordinates: 60°08′50″N 30°00′45″E / 60.14722°N 30.01250°E / 60.14722; 30.01250
Beloostrov (Russian: Белоо́стров; Finnish: Valkeasaari, both meaning lit. White Island), from 1922 to World War II—Krasnoostrov (Красноо́стров, lit. Red Island), is a municipal settlement in Kurortny District of the federal city of St. Petersburg, Russia, located on the Sestra River, Karelian Isthmus. Population: 2,080 (2010 Census); 1,690 (2002 Census); 1,405 (1989 Census).
Beloostrov historically consists of two parts: Novy Beloostrov (Russian: Но́вый Белоо́стров, New White Island; Finnish: Uusi Valkeasaari) along the railway and Stary Beloostrov (Russian: Ста́рый Белоо́стров, Old White Island; Finnish: Vanha Valkeasaari) several kilometers to the north, mostly belonging to Vsevolozhsky District of Leningrad Oblast under the name Sadovodstva (Russian: Садоводства). Until the Winter War Beloostrov was the last railway station before the Russia–Finland border.
Beloostrov has been a key station of the Saint Petersburg-Vyborg railroad since 1870 (initially named Rayala (Finnish: Rajala)) at the junction of Saint Petersburg–Zelenogorsk and Saint Petersburg–Sestroretsk–Beloostrov sections, being the final destination of many suburban passenger electric trains from the Finland Railroad Station.