Charles Alan Fyffe (1845–1892) was an English historian, known also as a journalist and political candidate.
He was the son of Lawrence Hay Fyffe, M.D. of Blackheath, by Mary Prudence, daughter of John Urd, born at Lee Park, Blackheath, on 3 December 1845. He was educated at Christ's Hospital, and obtained an open exhibition at Balliol College, Oxford, 1864. He graduated B.A. in 1868 and M.A. in 1870.
In 1871 Fyffe was elected a fellow of University College, and for many years acted as bursar. He acted as correspondent to the Daily News during the first part of the Franco-Prussian War, and was in Paris during the commune, where he was taken for a spy.