The Schuppanzigh Quartet was a string quartet formed in Vienna in the 1790s by the violinist Ignaz Schuppanzigh. It continued, with breaks and changes of membership, for many years. Schuppanzigh was a close friend and admirer of Ludwig van Beethoven, and the quartet gave the first performances of many of Beethoven's string quartets.

Ignaz Schuppanzigh was an Austrian violinist, friend and teacher of Beethoven, and leader of Count Razumovsky's private string quartet. Schuppanzigh and his quartet premiered many of Beethoven's string quartets, and in particular, the late string quartets. The Razumovsky quartet, which Schuppanzigh founded in late 1808, is considered to be the first professional string quartet. Until the founding of this quartet, quartet music was played primarily by amateurs or by professional musicians who joined together on an ad hoc basis.