Hafsteinn Gunnar Sigurðsson
- Birthday: 1978-01-01
- Place of birth: Reykjavík, Islanda
Hafsteinn Gunnar Sigurðsson (born 24 September 1978) is an Icelandic film director and screenwriter. Sigurðsson was born in Reykjavik, Iceland. He is a writer and director, known for Under the Tree (2017), Either Way (2011) and Skröltormar (2007).
