Influential architect. Born in Aberdeen, the son of a merchant. He was educated at Aberdeen Grammar School and Marischal College. Gibbs travelled in Europe and trained as an architect in Rome. He settled in London where he worked with Sir Christopher Wren. He was responsible for several important churches in the city, including St. Martin-in-the-Fields (1726), together with other public buildings such as St. Bartholomew's Hospital (1730), Senate House for the University of Cambridge (1730) and the Radcliffe Camera for the University of Oxford (1749). He designed country houses, including Sudbrooke Park (1728) for John Campbell, the 2nd Duke of Argyll, Balveny House near Banff (1724, demolished 1929) and Bank Hall (1750, now Warrington Town Hall).
He died in London and was buried in St. Marylebone Parish Church.