D'Alton is both a surname and a given name. Notable people with the name include:
Surname:
Eduard Joseph d'Alton (1772–1840), German engraver and naturalist
Johann Samuel Eduard d'Alton (1803-1854), German anatomist, son of Eduard d'Alton
John D'Alton (1882–1963), Irish Roman Catholic cardinal and Primate of All Ireland
John D'Alton (historian) (1792–1867), Irish lawyer and genealogist
Rob D'Alton (born 1923), Irish sailor and Olympian
Thomas d'Alton (1895–1968), Australian politician
Given name:
D'Alton Corry Coleman (1879–1956), Canadian businessman
D'Alton or Dalton McCarthy (1836–1898), Canadian lawyer and parliamentarian
