John Gilbert may refer to:

• John Gilbert (bishop), Bishop of Hereford (1375 to 1389)
• John Gibbs Gilbert (1810–99), American comedian
• John Davies Gilbert (1811 - 1854) English scientist.
• John Gilbert (naturalist) (1812–1845), British naturalist and exolorer
• John Gilbert (painter) (1817–1897), British artist
• Sir John Thomas Gilbert (1829–1898), Irish archivist and historian [1]
• John Gilbert (bushranger) (1842–1865), Australian bushranger
• John Gilbert (actor) (1899–1936), American actor of the of the silent film era
• John Gilbert (Canadian politician) (born 1921), NDP MP from Ontario
• John Gilbert, Baron Gilbert (born 1927), British Labour Party politician
• John Gilbert (broadcaster), from Canada