Alonso Fernández de Heredia (died March 19, 1782) was a Spanish Captain General and administrator who governed Honduras (1747), Florida (1751–1758), Yucatan (in modern-day Mexico; 1758–?

Heredia, like the other persons accused of smuggling, had fought against the British and promoted a plan to defend Spanish possessions on the Atlantic Coast.

[5] On the other hand, the Florida population grew under Heredia's administration when 363 agricultural settlers from the Canary Islands, Spain, arrived in St. Augustine in October 1757.

[3] Among his accomplishments in Yucatan, Heredia published a royal decree which exempted Indian women from all taxes and ordered several modifications to the fortification of Campeche.

His government in Honduras implemented a series of changes such as the reorganization of the tax code and an extension of state jurisdiction in social sectors.