La Scala (UK: , US: , Italian: [la ˈskaːla]; abbreviation in Italian of the official name Teatro alla Scala [teˈaːtro alla ˈskaːla]) is a famous opera house in Milan, Italy. The theatre was inaugurated on 3 August 1778 and was originally known as the Nuovo Regio Ducale Teatro alla Scala (New Royal-Ducal Theatre alla Scala). The premiere performance was Antonio Salieri's Europa riconosciuta.

Most of Italy's greatest operatic artists, and many of the finest singers from around the world, have appeared at La Scala. The theatre is regarded as one of the leading opera and ballet theatres globally. It is home to the La Scala Theatre Chorus, La Scala Theatre Ballet, La Scala Theatre Orchestra, and the Filarmonica della Scala orchestra. The theatre also has an associate school, known as the La Scala Theatre Academy (Italian: Accademia Teatro alla Scala), which offers professional training in music, dance, stagecraft, and stage management.