Ernest II, Duke of Saxe-Gotha-Altenburg
| Ernest II | |
|---|---|
Portrait by Johann Jonas Michael, c. 1775 | |
| Duke of Saxe-Gotha-Altenburg | |
| Reign | 10 March 1772 – 20 April 1804 |
| Predecessor | Frederick III |
| Successor | Augustus |
| Born | 30 January 1745 Gotha, Saxe-Gotha-Altenburg, Holy Roman Empire |
| Died | 20 April 1804 (aged 59) Gotha, Saxe-Gotha-Altenburg, Holy Roman Empire |
| Spouse | |
| Issue |
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| House | Saxe-Gotha-Altenburg |
| Father | Frederick III, Duke of Saxe-Gotha-Altenburg |
| Mother | Luise Dorothea of Saxe-Meiningen |
Ernest II, Duke of Saxe-Gotha-Altenburg (Gotha, 30 January 1745 – Gotha, 20 April 1804) was the reigning Duke of Saxe-Gotha-Altenburg from 1772 to 1804. He was the third but second surviving son of Frederick III, Duke of Saxe-Gotha-Altenburg and Luise Dorothea of Saxe-Meiningen. The death of his older brother Frederick in 1756 made him the heir to the duchy of Saxe-Gotha-Altenburg.