Eleanor Gilbert Rieffel (born 1965)^[1] is a mathematician interested in quantum computing, computer vision, and cryptography. She is a senior research scientist at NASA's Ames Research Center.^[2]

Rieffel earned her Ph.D. in 1993 from the University of California, Los Angeles. Her dissertation, Groups Coarse Quasi-Isometric to the Hyperbolic Plane Cross the Real Line, concerned geometric group theory, and was supervised by Geoffrey Mess.^[3] After working for FX Palo Alto Laboratory, she joined NASA in 2012.^[2] In 2019 she won the NASA Exceptional Engineering Achievement Medal.^[4]

With Wolfgang Polak, Rieffel is the author of the book Quantum Computing: A Gentle Introduction (MIT Press, 2011).^[5]