In J. R. R. Tolkien's fictional world of Middle-earth, Angband (Sindarin for 'iron prison') is the name of the fortress of Melkor, constructed before the First Age, located in the Iron Mountains in the enemy's land Dor Daedeloth north of Beleriand.

The fortress is described in Tolkien's The Silmarillion. It was built by Melkor (later called Morgoth) to guard against a possible attack from Aman by the Valar. Nonetheless, the Valars' attack succeeded in capturing Morgoth and destroying his main stronghold Utumno.