John Appleby may refer to:
John Appleby (inventor) (1840–1917), American inventor of knotting device to bind grain bundles with twine John Appleby (author), 20th-century American author of pulp novels including Conquered City Sir John Appleby, detective created by Michael Innes in the 1930s who appeared in many novels and short stories John Appleby (economist), Chief economist, The Nuffield Trust See also Appleby (disambiguation)