Halldór
Halldór or Halldor may refer to:
- Halldór Ásgrímsson, Icelandic politician, formerly Prime Minister of Iceland from 2004 to 2006
- Halldór Orri Björnsson, Icelandic international footballer
- Halldór Blöndal, politician of the Independence Party
- Lárus Halldór Grímsson, Icelandic composer and musician
- Halldór Guðmundsson, Icelandic author
- Halldór Helgason, Icelandic professional snowboarder
- Jón Halldór Kristjánsson, Icelandic politician and former Minister of Social Affairs
- Halldór Laxness, Icelandic novelist and author of Independent People, The Atom Station, and Iceland's Bell
- Halldór Eggert Sigurðsson, Icelandic politician and former minister
- Halldor Skard, former Norwegian Nordic combined skier who competed from 1990 to 2000
