Amandil is a fictional character from J.R.R. Tolkien's Middle-earth legendarium. Amandil was a Lord of Andúnië, suceeding his father Nùmendil upon his death. Amandil is most noted for being the father of Elendil, who later went onto found the Nùmenorean Realms in Exile.

The name Amandil is Quenya for "Friend of Aman" signifying his devotion to the Valar in defiance to the policies of the King's Men. He was also the leader of the faction of Elendili ("Elf-friends"), or the Faithful, who endured persecution from the King's Men.

In his youth Amandil was a great friend of Ar-Pharazon, the last king of Nùmenor. Amandil was also famed across Nùmenor for being a great sea-captain in the days of Nùmendil. However when Ar-Pharazon brought the conquered Sauron from Middle-earth, his friendship with Amandil withered. As time passed, Ar-Pharazon began persecuting the 'Faithful' more vigorously. However, he could not do much harm to Amandil as he was still an influental member of the Nùmenorean council and commanded respect among many people of Nùmenor from his earlier days as the mighty ship-captain.

Foreseeing the Downfall of Númenor, Amandil urged his son Elendil to prepare for departure to Middle-earth, and he himself decided to travel to Valinor to beg the Valar for forgiveness for the evil deeds of his people.

Amandil set sail east and later turned west (to hide what he was doing) towards Tol Eressëa, and was never heard from again. Elendil and his sons, having escaped the cataclysmic destruction of Númenor, made their way to Middle-earth to establish the Dúnedain kingdoms of Gondor and Arnor.