Wulf Bernard Kunkel (6 February 1923, Eichenau, Germany – 3 September 2013, Oakland, California) was a German-born American physicist, specializing in plasma physics, especially "the development of ion beams for plasma heating". Kunkel was a Guggenheim Fellow for the two academic years 1955–1956 and 1972–1973. He was elected a Fellow of the American Physical Society in 1955. He received Germany's Alexander von Humboldt Award in 1982. Upon his death he was survived by his widow, three children, and two grandchildren.