John Simpson CVO (born 9 November 1954) is a British architect.
Simpson studied architecture at University College London. He is Principal of John Simpson Architects LLP, Chartered Architects and Urban Designers, London. He is a member of Royal Institute of British Architects. Simpson is well known for being one of the few modern-day architects designing in the classical style, also known as New Classical Architecture.
"Having rejected International Modernism he sought to show how the classical language of architecture could be used in contemporary economic, technical and functional requirements. His work is derived largely from Georgian sources and he made his name with Ashfold House in West Sussex (1991), influenced by Soane’s architecture." (James Stevens Curl, Dictionary of Architecture)