Velikiy Knyaz Konstantin () or Grand Duke Constantine may refer to:
One of several Russian Grand Dukes of the Royal House of Romanov, see Konstantin Romanov (disambiguation) Fort Grand Duke Constantine (Russia), a fort defending Kronstadt, Russia
Ships
Russian tender Veliky Knyaz Konstantin, a torpedo boat tender of the Russian Navy launched in 1857 Velikiy Knyaz Konstantin, a 120-gun ship of the line of the Russian Black Sea Fleet, launched 1852, which participated in the Battle of Sinop