Rob Krier (born 1938 in Grevenmacher) is a Luxembourgian sculptor, architect, urban designer and theorist. He is former professor of architecture at Vienna University of Technology, Austria. From 1993 to mid-2010 he worked in partnership with architect Christoph Kohl in a joint office based in Berlin, Germany.
He is the older brother of fellow architect Léon Krier. Both are well-known representatives of New Urbanism and New Classical Architecture.