Armida (Italian pronunciation: [arˈmiːda]) is an operatic dramma per musica by Antonio Salieri in three acts, set to a libretto by Marco Coltellini.

The plot is based on the epic poem Gerusalemme liberata by Torquato Tasso.

Lully, Handel and Traetta, to name but a few, had already composed operas based on the situations that Tasso originally developed.

The plot of all of these, and Salieri's work, is based on the relationship between Armida and the Crusader Rinaldo.

Salieri's opera was first performed at the Vienna Burgtheater on 2 June 1771, and his composition was much influenced by the aesthetics of Christoph Willibald Gluck, who attempted to reform opera seria by tying the drama more closely to the music.