Ramiro I (bef.

1007 – 8 May 1063) is de facto the first King of Aragon from 1035 until his death.

Apparently born before 1007, he is the illegitimate son of Sancho III of Navarre by his mistress Sancha de Aybar.

Ramiro is reputed to have been adopted by his father's wife Mayor after he was the only of his father's children to come to her aid when needed, although there is no surviving record of these events and the story is probably apocryphal.