Jerónimo de Alderete
| 2nd Adelantado and Royal Governor of New Extremadura of Chile | |
|---|---|
| In office March, 1555 – April, 1556 | |
| Monarch | Philip II of Spain |
| Preceded by | Pedro de Valdivia |
| Succeeded by | Last holder |
| 3rd Adelantado of Terra Australis | |
| In office August 2, 1540 – December 25, 1553 | |
| Monarch | Charles I of Spain |
| Preceded by | Pedro de Valdivia |
| Succeeded by | Last holder |
| Personal details | |
| Born | c. 1518 Olmedo, Spain |
| Died | April 7, 1556 (aged 37–38) Taboga, Panama |
Jerónimo de Alderete y Mercado (Spanish: [xeˈɾonimo ðe aldeˈɾete]; c. 1518 – April 7, 1556) was a Spanish conquistador who was later named governor of Chile, but died before he could assume his post.