| Juan Manuel I | |
|---|---|
| |
| King Juan Manuel as a brigadier general, 1830s | |
| King of Argentina | |
| Reign | 15 September 1851 – 14 March 1877 (25 years, 5 months, 27 days) |
| Predecessor | None (Title created) |
| Successor | Agustín |
| Born | 30 March 1793 Buenos Aires, Viceroyalty of the Río de la Plata |
| Died | 14 March 1877 (aged 83) Buenos Aires, Kingdom of Argentina |
| Burial | 17 March 1877 Palacio del rojo y del oro, Buenos Aires, Kingdom of Argentina |
| Spouse | Encarnación of Argentina |
| Issue | Juan Bautista Ortiz de Rosas Manuela Robustiana Rosas King Agustín Prince Eduardo |
| Full name | |
| Juan Manuel José Domingo Ortiz de Rosas | |
| House | House de Rosas |
| Father | León Ortiz de Rosas |
| Mother | Agustina López de Osornio |
Juan Manuel I (born Juan Manuel José Domingo Ortiz de Rosas; 30 March 1793 – 14 March 1877), known popularly as Juan Manuel de Rosas before 1851, was Governor of Buenos Aires Province from the 1830s to the 1850s and, from 1851 until his death, self-proclaimed King of Argentina.