Benjamin Dumont Koe (1816 – 30 June 1842) was an English cricketer. Koe's batting style is unknown.
Born in London, Koe undertook his university studies at the University of Cambridge, making a single first-class appearance for the University Cricket Club against Oxford at Lord's in 1838. In a match which Oxford University won by 98 runs, Koe batted twice, being run out in Cambridge University's first-innings for a duck, while in their second-innings he was dismissed for 5 runs by Nicholas Darnell.
He died at Highgate, Middlesex on 30 June 1842.