Semiramide is an opera in two acts by Gioachino Rossini. The libretto by Gaetano Rossi is based on Voltaire's tragedy Semiramis, which in turn was based on the legend of Semiramis of Assyria. The opera was first performed at La Fenice in Venice on 3 February 1823.

Gioachino Antonio Rossini was an Italian composer who gained fame for his 39 operas, although he also wrote many songs, some chamber music and piano pieces and some sacred music. He set new standards for both comic and serious opera before retiring from large-scale composition while still in his thirties, at the height of his popularity.