The Beggar's Opera is a ballad opera in three acts written in 1728 by John Gay with music arranged by Johann Christoph Pepusch. It is one of the watershed plays in Augustan drama and is the only example of the once thriving genre of satirical ballad opera to remain popular today. Ballad operas were satiric musical plays that used some of the conventions of opera, but without recitative. The lyrics of the airs in the piece are set to popular broadsheet ballads, opera arias, church hymns and folk tunes of the time.

The ballad opera is a genre of English stage entertainment that originated in the early 18th century, and continued to develop over the following century and later. Like the earlier comédie en vaudeville and the later Singspiel, its distinguishing characteristic is the use of tunes in a popular style with spoken dialogue. These English plays were 'operas' mainly insofar as they satirized the conventions of the imported opera seria. Music critic Peter Gammond describes the ballad opera as "an important step in the emancipation of both the musical stage and the popular song."