King Arthur, or The British Worthy
- Composer: Henry Purcell
- Librettist: John Dryden (9?.8.1631 Aldwinkle All Saints, Northants. - 1.5.1700 London)
- Libretto
- First performance: Dorset Garden, London, 1691
- First performances in:
- Ireland: 7 Feb 1763, Dublin
- United States: 24 Apr 1800, New York (with Purcell's music?)
- France: 9 May 1922, Paris (private)
14 Nov 2005