Hasenfus is a surname (probably of German origin. Besides other meanings, "Hasenfuß" in German colloquially refers to a fearful person or a coward). Notable people with the surname include:
Eugene Hasenfus (1941–2025), a United States Marine helping the right-wing rebel Contras in Nicaragua Joseph Hasenfus (1913–1999), American canoeist Tavis Hasenfus, American attorney and politician in Maine Walter Hasenfus (1916–1944), American canoeist
See also Wolfgang Hasenfuss (1900–1944), Latvian chess master