John Brown (1805–1876) was a 19th-century architect working in Norwich, in the county of Norfolk, England. His buildings include churches and workhouses.
He was the pupil of the architect William Brown of Ipswich, a close relative. He was, along with his two sons, the surveyor for Norwich Cathedral, where his work there included a restoration of the crossing tower, undertaken during the 1830s. He was appointed County Surveyor for Norfolk in 1835.
Brown's works include:
Pevsner, Nikolaus (1962). North-East Norfolk and Norwich. The Buildings of England. Harmondsworth: Penguin Books.