Hans Freiherr Geyr von Schweppenburg (October 3, 1884 – August 24, 1963) was a German arborist and ornithologist. He was born in and studied in Bonn and Berlin, gaining a doctoral thesis in forest science. He became a professor at Münden Forestry University, where he stayed until his retirement in 1938. Geyr von Schweppenburg named some subspecies of birds, including the pale crag martin subspecies Ptyonoprogne obsoleta spatzi. In 1933 he signed the Vow of allegiance of the Professors of the German Universities and High-Schools to Adolf Hitler and the National Socialistic State.