Haldorsen is a surname. Notable people with the surname include:
Finn Haldorsen (1934–2005), Norwegian businessman Haldor Andreas Haldorsen (1883–1965), Norwegian politician Inger Haldorsen (1899–1982), Norwegian physician, midwife and politician Magne Haldorsen (1925–2005), Norwegian politician Ola Haldorsen (born 1965), Norwegian footballer