Ivan William Harbour (born 3 June 1962) is an architect and senior partner at RSHP.

He has been the leading architect on two Stirling Prize winning entries for the practice in 2006 and 2009 for Terminal 4 of Madrid-Barajas Airport and Maggie's Centre, London respectively.

[4] During 1983 he joined Yorke Rosenberg Mardall (YRM) as part of his studies and in 1984-85 he was with the London Borough of Hackney.

The Guardian's Charlotte Higgins described Harbour's work, in comparison with fellow partner Graham Stirk, to be "more expressive and sculptural" such as Madrid airport's brightly coloured Terminal 4.

[5] He has gone on to lead design teams on the European Court of Human Rights building, the Bordeaux Law Courts,[5] and winning the Stirling Prize for the practice in 2006 and 2009 for Terminal 4 of Madrid-Barajas Airport and Maggie's Centre, London respectively.