Bernhard Witkop (May 9, 1917 in Freiburg, Baden – November 22, 2010 in Chevy Chase, Maryland) was a German-born American organic chemist who worked for the National Institutes of Health (NIH) for 37 years. Dr. Witkop also helped pioneer the NIH Visiting Fellow Program. Among other foreign scientists, he began attracting visiting researchers to the program from Japan as early as 1955. He traveled frequently to Japan, where he gave talks in classical Japanese. In 1975, Witkop received the Order of the Sacred Treasure, bestowed by the Emperor of Japan.