Francis Weston Sears (October 1, 1898 – November 1975) was an American physicist. He was a professor of physics at MIT for 35 years before moving to Dartmouth College in 1956  and is best known for co-authoring University Physics, a highly regarded introductory physics textbook, with Mark Zemansky (thus, this book is often referred to as "Sears and Zemansky"). He was a Fellow of the Optical Society of America, and was active in the American Association of Physics Teachers, serving as its president in 1956.
- 1961 — Oersted Medal of the American Association of Physics Teachers
- Sears, Francis; Mark Zemansky, et al. (1991). College Physics (7th ed.). Addison Wesley.
- Sears, Francis (1958). Mechanics, Wave Motion, and Heat (1st ed.). Addison Wesley.
- Sears, Francis W. (1935). An Introduction to Optics. Cambridge, Massachusetts: MIT Press.
- Francis W. Sears (1975). Thermodynamics, Kinetic Theory, and Statistical Thermodynamics. Addison Wesley. ISBN 020106894X.
- Sears, Francis W. (1950). An Introduction to Thermodynamics, the Kinetic Theory of Gases and Statistical Mechanics. Addison Wesley.
- Sears, Francis W. (1950). Mechanics, heat and sound. Cambridge, Massachusetts. Addison Wesley.
- Sears, Francis W. (1946). Electricity and Magnetism. Reading, Massachusetts. Addison-Wesley