Mayall may refer to:
People with the surname Mayall: James Mayall (1856–1916), British cricketer John Mayall (1933–2024), British blues singer John Jabez Edwin Mayall (1813–1901), British photographer Margaret Mayall (1902–1995), American astronomer Nicholas U. Mayall (1906–1993), American observational astronomer Rik Mayall (1958–2014), British comedian and actor Samuel Mayall (1816–1892), 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