Dekabristov Island (Russian: остров Декабристов), or 'Decembrists' Island, known before 1926 as Goloday Island (остров Голодай - possibly a corruption of a British merchant name Halliday) is an island in Vasileostrovsky District of Saint Petersburg, Russia, to the north of Vasilyevsky Island, separated from it by Smolenka River (59°57′N30°14′E).