The Weizmann Institute of Science (Hebrew: מכון ויצמן למדע‎ Machon Weizmann LeMada), known as Machon Weizmann is a university and research institute in Rehovot, Israel. It differs from other Israeli universities in that it offers only graduate and post-graduate studies in the sciences. In 2010, The Scientist rated the Weizmann Institute as the second best place in the world to work in academia among non-US institutions.

Founded in 1934 by Chaim Weizmann as the Daniel Sieff Research Institute, it was renamed the Weizmann Institute of Science in his honor on November 2, 1949. Before he became President of the State of Israel, Weizmann pursued his research in organic chemistry at its laboratories. The Weizmann Institute presently has about 2,500 students, staff, and faculty, and awards M.Sc. and Ph.D. degrees in mathematics, computer science, physics, chemistry, biological chemistry and biology, as well as several interdisciplinary programs

In 1996 and 2002 respectively, two Weizmann Institute researchers - Amir Pnueli and Adi Shamir - won the Turing Award. Ada Yonath won the Wolf Prize for Chemistry in 2006 and the Nobel Prize for Chemistry in 2009. Several faculty have been awarded Wolf Prizes in Medicine, including Leo Sachs (1980), Meir Wilchek (1987), and Michael Sela and Ruth Arnon (shared, 1998).

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