Thomas Turnbull (1824–1907) was a notable New Zealand architect. He was born in Glasgow, Lanarkshire, Scotland in 1824. He was the first president of the Wellington Association of Architects, and a member of the Wellington City Council in 1891. He designed the Old Bank Arcade, St John's Church in Willis Street, and St Patrick’s Catholic Church, Masterton. His 3-storey design for the General Assembly Library was not completed because of rising costs, and it was finished with only two floors by John Campbell in 1899.His youngest son, William Turnbull, joined his practice in 1891.