Mayall may refer to:
People with the surname Mayall:
- James Mayall, a British cricketer.
- John Mayall, a British blues singer.
- John Jabez Edwin Mayall, a British photographer.
- Margaret Mayall, an American astronomer.
- Nicholas U. Mayall, a 20th century astronomer.
- Rik Mayall, a British comedian and actor.
- Samuel Mayall, a Thirty-third Congress Representative from Maine.
- Astronomical objects and related
- Mayall II, Mayall III, Mayall IV, Mayall V, and Mayall VI globular clusters in the Andromeda Galaxy
- Mayall's Object, or Arp 148, a peculiar galaxy, or pair of colliding galaxies
- 2131 Mayall, a minor planet
- Nicholas U. Mayall Telescope, telescope at the Kitt Peak National Observatory