Andreasen
Andreasen and the parallel form Andresen are Danish-Norwegian patronymic surnames meaning "son of Andreas". It has a similar origin as the name Andersen. It may refer to:
- Christian Andreasen, Danish footballer
- Emil Andreasen, Danish boxer
- Frank Andreasen, Danish darts player
- George Andreasen, American orthodontist
- Heidi Andreasen, Faroese paralympic swimming silver medalist
- Jakob Andreasen, Danish handball coach
- Lawrence Andreasen, American athlete
- Leon Andreasen, Danish footballer
- Marta Andreasen, Argentina-born member of the European Parliament
- Nancy Coover Andreasen, American neuroscientist
- Rannvá Andreasen, Faroese association footballer
- Søren Andreasen, Danish footballer
