Widukind Lenz (4 February 1919, Eichenau – 25 February 1995) was a distinguished German pediatrician, medical geneticist and dysmorphologist who was among the first to recognize the thalidomide syndrome in 1961 and alert the world to the dangers of limb and other malformations due to the mother's exposure to this drug during pregnancy. He was the younger brother of mathematician Hanfried Lenz.