Väinämöinen was a Finnish coastal defence ship, the sister ship of the Finnish Navy's flagship Ilmarinen and also the first ship of her class. She was built at the Crichton-Vulcan shipyard in Turku and was launched in 1932. Following the end of the Continuation War, Väinämöinen was handed over to the Soviet Union as war reparations and renamed Vyborg. The ship remained in Soviet hands until her scrapping in 1966.

Coastal defence ships were warships built for the purpose of coastal defence, mostly during the period from 1860 to 1920. They were small, often cruiser-sized warships that sacrificed speed and range for armour and armament. They were usually attractive to nations that either could not afford full-sized battleships or could be satisfied by specially designed shallow-draft vessels capable of littoral operations close to their own shores. The Nordic countries and Thailand found them particularly appropriate for their island-dotted coastal waters. Some vessels had limited blue-water capabilities; others operated in rivers.