Douglas Dean Osheroff (born August 1, 1945) is an American physicist known for his work in experimental condensed matter physics, in particular for his co-discovery of superfluidity in Helium-3.

"[3] Osheroff earned his bachelor's degree in 1967 from Caltech, where he attended lectures by Richard Feynman and did undergraduate research for Gerry Neugebauer.

Together with David Lee, the head of the laboratory, and Robert C. Richardson, Osheroff used a Pomeranchuk cell to investigate the behaviour of 3He at temperatures within a few thousandths of a degree of absolute zero.

He currently serves on the board of advisors of Scientists and Engineers for America, an organization focused on promoting sound science in American government.

Among his physics outreach activities, Osheroff participated in the science festivals for middle and high school students, is an official guest of honor at the International Young Physicists' Tournament 2013.