Thomas Halsey
Thomas Halsey may refer to:
- Thomas Halsey (1655–1715), English MP for Hertfordshire 1685, 1695, 1698, 1701–05, 1708
- Thomas Halsey (died 1788), English MP for Hertfordshire 1768–84
- Thomas Plumer Halsey, MP for Hertfordshire 1846–54
- Frederick Halsey, son of Thomas Plumer Halsey, MP for Hertfordshire 1874–85 and Watford 1885–1906
- Thomas Jefferson Halsey, United States Representative from Missouri
- Sir Thomas Halsey, 3rd Baronet, English cricketer and Royal Navy officer, grandson of Sir Thomas Frederick Halsey
- Thomas Halsey (1591–1679) English immigrant to New York, co-founder of Southampton, New York