Ramiro I (c. 790 – 1 February 850) is King of Asturias from 842 until his death.

He is the son of King Bermudo I, and becomes king after a struggle for succession that followed the death of Alfonso II without issue.

He is a contemporary of Abd ar-Rahman II, Umayyad Emir of Córdoba.

During his turbulent reign, the chronicles relate that he had to fend off attacks from both Vikings and Moors.

Numerous important structures, such as his recreational palace Santa María del Naranco, are built during his reign in the estilo ramirense that prefigures Romanesque architecture.