Constantine Dalassenos () was a prominent Byzantine aristocrat and general of the first half of the 11th century. An experienced and popular general, he twice came close to ascending the imperial throne and marriage to the porphyrogenita Empress Zoe (r. 1028–1050), and suffered a long period of imprisonment under Michael IV the Paphlagonian (r. 1034–1041), who feared that he plotted against him.