John C. Brown (1827–1889) was a Confederate general and Tennessee governor. John C. Brown may also refer to:

John C. Brown (offensive tackle) (born 1939), American NFL football offensive tackle John C. Brown (Ohio politician) (1844–1900), American politician John Cameron Brown (c. 1843–?), Canadian political figure in New Brunswick John Campbell Brown (1947–2019), Scottish astronomer John Carter Brown (1797–1874), American book collector and antiquarian John Crawford Brown (1805–1867), Scottish landscape painter John Crosby Brown (1838–1909), American banker; partner in Brown Bros. & Co. John Croumbie Brown (1808–1895), Scottish missionary and forestry pioneer in South Africa John Cunningham Brown (1844–1929), Irish-born political figure in British Columbia