Marion DeKalb Taylor or M. D. K. Taylor (October 13, 1818 – June 22, 1897) was an American politician in Alabama and Texas, as well as a general in the Confederate army during the American Civil War. He was a member of the Alabama Legislature for two stints between 1842 and 1846, and served in both the Texas House of Representatives and the Texas Senate. In the Texas House, Taylor served three non-consecutive terms as Speaker of the House, and, in the Texas Senate, was twice elected President pro tempore of the Texas Senate.