| Birgitte Karlsen Hagen | |
| Nationality: | Norwegian |
| Birth Date: | 19 April 1994 |
| Birth Place: | Bergen, Norway |
| Position: | Left back |
| Currentclub: | Tertnes HE |
| Clubnumber: | 2 |
| Years1: | –2012 |
| Years2: | 2012–2017 |
| Years3: | 2017–2018 |
| Clubs3: | Silkeborg-Voel KFUM |
| Years4: | 2019– |
| Clubs4: | Tertnes HE |
Birgitte Karlsen Hagen (born 19 April 1994) is a Norwegian handball player who plays for Tertnes HE.[1]
She also represented Norway in the 2013 Women's Junior European Handball Championship, placing 4th,[2] and in the 2014 Women's Junior World Handball Championship, placing 9th.