Rob Krier (10 June 1938 – 20 November 2023) was a Luxembourgish sculptor, architect, urban designer, and theorist. He was a professor of architecture at Vienna University of Technology, Austria. From 1993 to mid-2010s he worked in partnership with architect Christoph Kohl in a joint office based in Berlin, Germany.
He was the older brother of fellow architect Léon Krier. Both are well-known representatives of New Urbanism and New Classical Architecture.