Erdahl is a surname. Notable people with the surname include:
Arlen Erdahl (1931–2023), American politician Dale Erdahl (1931–2005), American businessman, farmer, and politician Jamie Erdahl (born 1988), American television reporter Ludwig B. Erdahl (1889-1969), American farmer and politician Paul Erdahl (1902–1985), Norwegian boxer Thor Erdahl (born 1951), Norwegian painter