John Blackwell Hale (27 February 1831-1 February 1905) was a member of the US House of Representatives (D-MO 2) from 4 March 1885 to 3 March 1887, succeeding Armstead M. Alexander and preceding Charles H. Mansur. Born in Hancock County, West Virginia, he became a lawyer in Brunswick, Missouri before serving in the state house from 1856 to 1868, as a Democratic presidential elector in 1860, as colonel of the 65th Missouri Infantry Regiment, USA during the American Civil War, and in Congress.