Maglor is a fictional character portrayed in J.R.R. Tolkien's fantasy universe of Middle-earth, the second son of Fëanor and Nerdanel. He was the greatest poet and bard of the Ñoldor and was said to have inherited more of his mother's gentler temperament.

"Maglor" is a Sindarin rendering of his Quenya mother name "Macalaurë", which means "Gold-cleaver" — possibly alluding to the power of his voice. (He was also known as "Strong-voiced".) The meaning behind Maglor's father name, "Canafinwë", is uncertain, but probably contains the prefix kana/o (commanding) + Finwë.

As with the other Sons of Fëanor, Maglor was bound by an oath to recover his father's Silmarils, which had been stolen by the Dark Lord Morgoth. This oath took the seven brothers to Middle-earth during the First Age where they established realms in exile, waged war against the armies of Morgoth, fought their own Elvish kind, and eventually brought ruin upon themselves.

After the War of Wrath, he and his last surviving brother, Maedhros stole the two remaining Silmarils taken by the Valar from Morgoth, even though initially Maglor tried to dissuade his older brother from doing this. But because of the evil deeds committed by the brothers to regain the jewels, they burned in Maglor and Maedhros's hands. Unable to bear the suffering, Maglor cast his Silmaril into the sea. Thereafter he wandered along the shores of the world, singing laments over the loss of the jewel, until he faded from memory.

Tolkien refers to Maglor as one of Fëanor's sons that were probably married, but we have no information on his wife or any children.

See also Maglor's Gap.