Halvorsen is a Norwegian patronymic surname which may refer to:
Aasmund Halvorsen Vinje (1851–1917), Norwegian politician for the Liberal Party
Asbjørn Halvorsen (1898–1955), Norwegian footballer.
Birger Halvorsen (1905–1976), Norwegian high jumper
Einfrid Halvorsen, Norwegian politician for the Labour Party
Gail Halvorsen, American command pilot
Gunnar Halvorsen (1945–2006), Norwegian politician for the Labour Party
Harald Halvorsen, Norwegian gymnast
Harald Halvorsen (politician), Norwegian politician for the Labour Party
Håvard Halvorsen, Norwegian football defender
Hjalmer S. Halvorsen (1884-1970), American politician
Jan Halvor Halvorsen, Norwegian football manager
Johan Halvorsen (1864–1935), Norwegian composer, conductor and violinist
Johan Magnus Halvorsen, Norwegian politician for the Liberal Party
John Halvorsen, Norwegian long-distance runner
Kristin Halvorsen, Norwegian socialist politician
Lars Halvorsen and Sons, boat builders
Mette Halvorsen, Norwegian curler
Otto Bahr Halvorsen (1872–1923), Norwegian politician from the Conservative Party
Stian Lind Halvorsen, Norwegian football defender
Tor Halvorsen (1930–1987), Norwegian trade unionist and politician for the Labour Party
Tore Halvorsen, Norwegian entrepreneur and CEO of FMC Technologies
Trond Halvorsen Wirstad (1904–1985), Norwegian politician for the Centre Party
Sigurd Halvorsen Johannessen (1881–1964), Norwegian acting councillor of state
