Charles Barrington Brown (23 August 1839, Cape Breton Island – 13 February 1917, London) was a Canadian geologist and explorer. On April 24, 1870, he was one of two English-based geologists appointed government surveyors to the colony of British Guiana (now known as Guyana). That same year, he was the first Westerner to see Kaieteur Falls. The other surveyor was James Sawkins. Brown was educated at Harvard University, and at the Royal School of Mines, London (1862–1864), taking his associateship in Geology.