Roald Amundsen was a Norwegian polar explorer.
Amundsen may also refer to:
- Amundsen (surname), people with the surname
- Sophie Amundsen, a fictional character from the novel Sophie's World
- Amundsen (crater), a large crater on the Moon
- Amundsen (film), a 2019 Norwegian film about Roald Amundsen
- CCGS Amundsen, a Canadian Coast Guard icebreaker and Arctic research ship
- Amundsen High School, in Chicago, Illinois
- Amundsen, one of two probes on the NASA Deep Space 2 mission