Konstantin Romanov may refer to:
Grand Duke Constantine Pavlovich of Russia (1779–1831), second son of the Russian Emperor Paul I Grand Duke Konstantin Nikolayevich of Russia (1827–1892), second son of the Russian Emperor Nicholas I Grand Duke Konstantin Konstantinovich of Russia (1858–1915), second son of the above Grand Duke Constantine Nicolaievich Prince Constantine Constantinovich of Russia (1891–1918), son of the above Grand Duke Constantine Constantinovich Konstantin Romanov (ice hockey) (born 1985), Kazakh professional ice hockey player