David J. Julius (born November 4, 1955) is an American physiologist. He is a professor at the University of California, San Francisco.A native of Brighton Beach, Julius earned his undergraduate degree from Massachusetts Institute of Technology in 1977. He attained his doctorate from University of California, Berkeley in 1984, under joint supervision of Jeremy Thorner and Randy Schekman.In 2010 he received the Princess of Asturias Award for Technical and Scientific Research.