Anna I. Krylov (Russian: Анна Игоревна Крылова) is the Gabilan Distinguished Professor in Science and Engineering and a Professor of Chemistry at the University of Southern California (USC), working in the field of theoretical and computational quantum chemistry. She is the inventor of the spin-flip method. Krylov is the president of Q-Chem, Inc. and an elected member of the International Academy of Quantum Molecular Science.