Janet A. W. Elliott is a Canadian engineering scientist and researcher in thermodynamics. She is a distinguished professor in the University of Alberta Faculty of Engineering, and held a Tier 1 Canada Research Chair in thermodynamics (2011–2025). Elliott develops and applies thermodynamic models to study the physics of surfaces, such as liquid–vapor boundaries, and to advance cryopreservation, the process of preserving living cells and tissues through cooling and rewarming them without significant damage.