Paul B. Sigler (February 19, 1934 – January 11, 2000) was the Henry Ford II Professor of Molecular Biophysics and Biochemistry at Yale University. Major awards included membership in the National Academy of Sciences, HHMI Investigator status, and Guggenheim and Helen Hay Whitney Fellowships. He is noted for pioneering studies of Phospholipase A2 and trp repressor amongst many others.