| Native Name: | Département de Mer-Égée |
| Conventional Long Name: | Department of Mer-Égée |
| Common Name: | Mer-Égée |
| Year Start: | 1797 |
| Year End: | 1798 |
| Flag: | Flag of France |
| Image Map Caption: | The three departments of Greece |
| Official Languages: | French |
| Common Languages: | Greek |
| Status: | Department of the French First Republic |
| Admin Center Type: | Chef-lieu |
| Admin Center: | Zakynthos 37.78°N 20.89°W |
| Leader Title1: | Commissioner |
| Leader Name1: | Chriseuil de Rulhière |
| Era: | French Revolutionary Wars |
| Event Pre: | Treaty of Campo Formio |
| Date Pre: | 18 October 1798 |
| Event Start: | Establishment |
| Date Start: | 7 November |
| Date End: | 25 October |
| Event End: | Fall of Zakynthos |
| Date Post: | 25 March 1802 |
| Event Post: | Official disbandment |
| P1: | Venetian rule in the Ionian Islands |
| Flag P1: | Flag_of_the_Republic_of_Venice.svg |
| S1: | Septinsular Republic |
| Flag S1: | Flag_of_the_Septinsular_Republic.svg |
| S2: | Pashalik of Yanina |
| Flag S2: | Flag of the Ottoman Empire.svg |
| Today: |
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Mer-Égée (in French mɛʁ eʒe/; French for "Aegean Sea") was one of three short-lived French departments of Greece. It came into existence after Napoleon's conquest in 1797 of the Republic of Venice, when Venetian Greek possessions such as the Ionian islands fell to the French Directory.
The department included the islands of Zante (Zakynthos), Kythira and the Strofades, as well as Dragamesto (modern Astakos) on the Greek mainland. Despite its name, the department was mostly not in the Aegean, but the Ionian Sea, apart from Kythira and its dependencies.
Its prefecture was at the town of Zante (Zakynthos). The territories were lost to Russia in 1798 except Dragamesto that was captured by Ali Pasha, ruler of the Pashalik of Yanina, and the department was officially disbanded in 1802.
During the renewed French control of the area in 1807–1809, the department was not re-established, the constitutional form of the Septinsular Republic being kept.
The Commissioner of the Directory was the highest state representative in the department.