| George Ducas | |
|---|---|
 Ducas on a mural of the Cetățuia Monastery | |
| Prince of Moldavia (1st reign) | |
| Reign | 11 September 1665 – 21 May 1666 |
| Predecessor | Eustratie Dabija |
| Successor | Iliaș Alexandru |
| Prince of Moldavia (2nd reign) | |
| Reign | 8 November 1668 – 10 August 1672 |
| Predecessor | Iliaș Alexandru |
| Successor | Ștefan Petriceicu |
| Prince of Wallachia | |
| Reign | November/December 1674 – 29 November 1678 |
| Predecessor | Grigore I Ghica |
| Successor | Șerban Cantacuzino |
| Prince of Moldavia (3rd reign) | |
| Reign | 28 November 1678 – 25 December 1683 |
| Predecessor | Antonie Ruset |
| Successor | Ștefan Petriceicu |
| Hetman of Ottoman Ukraine | |
| Reign | 11 February 1681 – 25 December 1683 |
| Predecessor | Yurii Khmelnytsky |
| Successor | Teodor Soulymenko |
| Born | ca. 1620 Ottoman Albania |
| Died | 31 March 1685 Lwów, Poland |
| Burial | |
| Spouse | Anastasiya Dabizha, then Dafina Doamna |
| Issue | Constantine Ducas (prince of Moldavia) Matei Maria (engaged to Prince Antioh Cantemir) Catrina (wife of Prince Ștefan Tomșa) Ileana (wife of chronicler Nicolae Costin) Sanda Safta Anastasia |
| Religion | Orthodox |
| Signature |  |
Voivode George Ducas (Greek: Γεώργιος Δούκας, Geórgios Doúkas; Romanian: Gheorghe Duca; old Romanian: Георге Дука; c. 1620 – 31 March 1685) was three times prince of Moldavia (1665–1666, 1668–1672, 1678–1684), one time prince of Wallachia (1674–1678) and one time Hetman of Ottoman Ukraine (1681–1683).
He was married to Anastasiya Dabizha, the daughter of Prince Eustratie Dabija, and later to Dafina Doamna; George Ducas fathered Constantine Ducas.
