| Fort San Diego | |
|---|---|
Fuerte de San Diego | |
| Acapulco, Guerrero, Mexico | |
 View of the Fort of San Diego | |
| Coordinates | 16°51′0″N 99°54′8.6″W / 16.85000°N 99.902389°W |
| Type | Star fort |
| Site information | |
| Controlled by | Instituto Nacional de Antropología e Historia |
| Open to the public | Yes |
| Condition | Intact |
| Website | Official website |
| Site history | |
| Built | 1616–1617 (first fort) 1778–1783 (second fort) |
| Built by | Spanish Empire |
| Materials | Stone |
| Battles/wars | Mexican War of Independence French intervention in Mexico Mexican Revolution |
| Garrison information | |
| Past commanders | Pedro Antonio Vélez (1813) |
The Fort of San Diego (Spanish: Fuerte de San Diego), formerly also known as the Fort of San Carlos (Spanish: Fuerte de San Carlos) is a star fort in Acapulco, Guerrero, Mexico. It was built by the Spanish Empire, and it was one of the most important Spanish fortifications along the Pacific coast. The fort was first built in the 17th century, but was completely rebuilt in the 18th century. Today, it is an important landmark in Acapulco, and it is open to the public as the Acapulco Historic Museum (Spanish: Museo Histórico de Acapulco).