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