Fritjof Capra (born February 1, 1939) is an Austrian-born American physicist.

Born in Vienna, Austria, Capra earned a Ph.D. in theoretical physics from the University of Vienna in 1966. He has done research on particle physics and systems theory, and has written popular books on the implications of science, notably The Tao of Physics, subtitled An Exploration of the Parallels Between Modern Physics and Eastern Mysticism. The Tao of Physics makes an assertion that physics and metaphysics are both inexorably leading to the same knowledge. He is fluent in Italian.