Ljungdahl is a Swedish surname. Notable people with the surname include: Axel Ljungdahl (1897–1995), a Swedish Air Force general. Carina Ljungdahl (born 1960), Swedish swimmer. Else-Marie Ljungdahl (born 1942), Swedish sprint canoeist. Lars Ljungdahl (1926-2023), a Swedish biochemist https://en.wikipedia.org/wiki/Ljungdahl