| Constantine Angelos Doukas | |
|---|---|
| Usurper of the Byzantine Empire | |
| Reign | 1192/93 |
| Predecessor | Isaac II Angelos |
| Successor | Isaac II Angelos |
| Born | c. 1170 |
| Died | after 1192/93 |
| Dynasty | Angelid dynasty |
| Father | Isaac Angelos Doukas |
| Mother | Unknown |
Constantine Angelos Doukas, Latinized as Angelus Ducas (Greek: Κωνσταντίνος Ἂγγελος Δούκας, romanized: Kōnstantinos Angelos Doukas), was a usurper who attempted to overthrow his cousin, the Byzantine emperor Isaac II Angelos, in 1192/93.