Louis Auslander (July 12, 1928 – February 25, 1997) was an American mathematician. He had wide ranging interests both in pure and applied mathematics and worked on Finsler geometry, geometry of solvmanifolds and nilmanifolds, locally affine spaces, many aspects of harmonic analysis, representation theory of solvable Lie groups, and multidimensional Fourier transforms and the design of signal sets for communications and radar. He is the author of more than one hundred papers and ten books. He received his Ph.D. at the University of Chicago in 1955 under S. S. Chern. After holding a variety of faculty positions at US universities, in 1965 Auslander joined the faculty at City University of New York, Graduate Center and since 1971 he had been a Distinguished Professor of Mathematics and Computer Science there.

Louis Auslander (* 12. Juli 1928 in Brooklyn; † 25. Februar 1997) war ein US-amerikanischer Mathematiker, der sich mit Differentialgeometrie und Liegruppen beschäftigte.