John Simpson CVO (born 9 November 1954), is a British New Classical architect.

This article includes a list of general references, but it lacks sufficient corresponding inline citations. (December 2022)

Simpson studied architecture at University College London.

Simpson 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 part of the New Classical Architecture movement of contemporary architects designing in classical styles. A profile of Simpson's design for his own house featured on the Sky Arts programme The Art of Architecture in 2019.^[1]

In 1991, Simpson architected Ashfold House in West Sussex.

• Masterplan for the area around St Paul's Cathedral, London (1992–1996).
• The West Range of Gonville Court, Gonville and Caius College, Cambridge (1993–1996)^[2]
• New buildings for Lady Margaret Hall, Oxford (2010–2017).
• The Queen's Gallery, Buckingham Palace, London (2002).
• Masterplan for Fairford Leys, a village outside Aylesbury, Buckinghamshire.
• Walsh Family Hall of Architecture, University of Notre Dame (2019)
• Masterplan to reorganize Kensington Palace into a public visitor and community facility (2008–2012).