Valandil was the third High King of Arnor. He was the fourth, and youngest, son of Isildur. When his father and brothers went off to the War of the Last Alliance, he and his mother were harboured in Rivendell until the war was over because he was too young yet to fight.

At last the three survivors of the Disaster at Gladden Fields returned to Rivendell. Among them was Ohtar, who carried the Shards of Narsil. The pieces of the sword were given to Valandil, but its light was extinguished and Elrond foretold that it would not be reforged lest the One Ring be found and Sauron return.

Valandil reigned from TA 10 until TA 249. He was succeeded then by his son Eldacar of Arnor.