Thomas Dalton may refer to:
Thomas de Kirkcudbright (before 1294–1326), also known as Thomas de Dalton, medieval prelate from the Kingdom of Scotland
Thomas Dalton (abolitionist) (1794–1883), African American abolitionist
Thomas Dalton (Australian politician) (1829–1901), Irish-born Australian politician
Thomas Dalton Johnston, Canadian politician
Tom Dalton (1904–1981), Australian politician and member of the New South Wales Legislative Assembly
Thomas d'Alton (1895–1968), Australian politician
Thomas Dalton (merchant) (1516/17–1591), English merchant, landowner, and Member of Parliament
Thomas Dalton, MP for Leicester 1455–56
Thomas Dalton (judge) (before 1702–1730), English judge and Chief Baron of the Irish Exchequer