Geir is a male name common in Iceland and Norway, rare in Sweden, and very rare in Denmark. It is an ancient Nordic name meaning "spear" or spear of God, as in the lightning bolt of Oden, and is one of the original Nordic runes
In Norway, its popularity peaked in the late 1960s and early 1970s. Nowadays it is an uncommon name among newborns in Norway but still holds its place in Iceland.
Notable people called Geir include:
- Geir Falck-Pedersen, Norwegian shipping industry innovator and founder of Ticon
- Geir Moen, Norwegian sprinter
- Geir Karlstad, Norwegian speed skater, Olympic gold and bronze medalist
- Geir Hasund, Norwegian soccer player
- Geir Hallgrímsson, Prime Minister of Iceland (1974–78)
- Geir Haarde, Prime Minister of Iceland (2006–09)
- Geir Ivarsøy, Norwegian programmer at Opera Software (died 2006)
- Geir Hansteen Jörgensen, Swedish film director
- Geir Helgemo, Norwegian bridge player
- Geir Zahl, Norwegian musician in the band Kaizers Orchestra. Also has a solo project.
- Geir Andre Erlandsen, Norwegian table tennis player
- Geir Lippestad, Norwegian lawyer