The Human Factors and Ergonomics Society (HFES) is an international, multidisciplinary, nonprofit organization of close to 5,000 members. HFES is the largest organization of human factors professionals in the world.

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HFES members are concerned with the safety, usability, and maintainability of systems and products that involve the human as an operator or maintainer. Since its formation in 1957, HFES has promoted the discovery and exchange of human factors knowledge, as well as the education and training of students and practitioners.

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HFES is a member of the International Ergonomics Association (IEA).