Hanna Oftedal Sagosen (, born 4 July 1994) is a former Norwegian handball player, who last played for Silkeborg-Voel KFUM. She also represented Norway in the 2013 Women's Junior European Handball Championship, placing 4th, and in the 2014 Women's Junior World Handball Championship, placing 9th.
In November 2019 she announced her retirement, due to serious injury.
She is a younger sister of Stine Bredal Oftedal.
She is married to fellow handballer Sander Sagosen. Their first child, son Noah, was born on July 13, 2023.