Sir Terence Farrell CBE FRIBA FRSA FCSD (12 May 1938 – 28 September 2025) was a British architect and urban designer.
In 1980, after working for 15 years in partnership with Nicholas Grimshaw, Farrell founded his own firm, Farrells. He established his reputation with three completed projects in London in the late 1980s: Embankment Place, 125 London Wall and the SIS Building. He created contextual urban design schemes, as well as works of postmodernism such as the MI6 Building. In 1991, his practice opened an office in Hong Kong. In Asia his firm designed KK100 in Shenzhen and Guangzhou South railway station in Guangzhou.