The Harvard John A. Paulson School of Engineering and Applied Sciences (SEAS) is the engineering school of the Faculty of Arts and Sciences at Harvard University.

It offers degrees in engineering and applied sciences to graduate students admitted directly to SEAS, and to undergraduates admitted first to Harvard College. Previously the Lawrence Scientific School and then the Division of Engineering and Applied Sciences, the Paulson School assumed its current structure in 2007. David C. Parkes has been its dean since 2023.

SEAS is housed in Harvard's Science and Engineering Complex (SEC) in the Allston neighborhood of Boston directly across the Charles River from Harvard's main campus in Cambridge and adjacent to the Harvard Business School and Harvard Innovation Labs.