| Honorific Suffix: | Marquis de Contades |
| Office: | Member of the Chamber of Deputies for Cantal |
| Term Start: | 20 November 1847 |
| Term End: | 24 February 1848 |
| Birth Date: | 6 June 1814 |
| Birth Place: | Angers, Maine-et-Loire |
| Death Place: | Paris |
| Residence: | Château de Montgeoffroy |
| Parents: | Marie-Henriette d'Oms Gaspard de Contades |
Erasmus-Henri de Contades, Marquis de Contades (6 June 1814 – 24 February 1858) was a French diplomat and politician.
Contades was born on 6 June 1814 in Angers, the prefecture of the Maine-et-Loire department. He was a son of Marie-Henriette d'Oms (1790–1858),[1] and Gaspard de Contades (1785–1817), a Senior Officer of Cuirassiers who died when he was only 31 years old.[2]
Through his grandfather, Erasmus-Gaspard de Contades, he was a descendant of Louis Georges Érasme de Contades, Marquis de Contades and Marshal of France. His maternal grandparents were Count Dominique-Hippolyte d'Oms and Aglaé Françoise de Castellane (daughter of François-Henri de Castellane, Marquis de Castellane).[3]
After serving as an embassy attaché, he was elected on 20 November 1847 to the Chamber of Deputies, the lower house of the French Parliament, for Cantal.[4] The French Revolution of 1848, which led to the collapse of the July Monarchy and the foundation of the French Second Republic, ended his political career.[5]
On 27 June 1836, Contades married distant cousin Sophie de Castellane (1818–1904), a daughter of Count Boniface de Castellane and Louise Cordélia Greffulhe (younger sister of Jean-Henry-Louis Greffulhe).[6] Her brother, Henri de Castellane, married Pauline de Talleyrand-Périgord and her sister, Pauline de Castellane, married Max von Hatzfeld and, after his death, Louis de Talleyrand-Périgord.[6]
Contades died in Paris on 24 February 1858. After his death, his widow married Victor de Beaulaincourt, Comte de Beaulaincourt de Marles in 1859.[7]