| Age | 48 (age at death) |
| Birthday | 19 July, 1764 |
| Birthplace | Buenos Aires, Viceroyalty of Perú |
| Died | 12 October, 1812 |
| Place of Death | Buenos Aires, United Provinces of the Río de la Plata |
| Zodiac Sign | Cancer |
| Nationality | Argentinean |
| Occupation | Attorney |
Juan José Castelli (19 July 1764 – 12 October 1812) was an Argentine lawyer. He was one of the leaders of the May Revolution, which started the Argentine War of Independence. He led an ill-fated military campaign in Upper Peru.
