Lloyd Motz (June 5, 1909, Susquehanna, Pennsylvania – March 14, 2004, New York City) was an American astronomer.
Born in Pennsylvania, Motz graduated from the City College of New York 1930 and earned a Ph.D. in physics from Columbia University in 1936.
College courses he taught included introductory astronomy, astronomical physics, and celestial mechanics.
He founded the Phi Beta Kappa chapter at Columbia's School of General Studies.
[citation needed] Lloyd Motz was the author of 21 books on astronomy, including The Constellations (1988, ISBN 0-385-17600-7) co-authored with Carol Nathanson.