The height of Ladd Drummond does not appear to have been made public. Judging from pictures of him standing next to his wife, whose height is known, his height is likely to be between 5' 11" and 6' 1".
Ladd Drummond is married to the host of The Food Network's "The Pioneer Woman" television series, Ree Drummond. Ree's height is 5' 9", according to the Internet Movie Database. Ladd is clearly taller than his wife but only by a few inches at most. He is often seen wearing a cowboy hat in photos with his wife so the height disparity is difficult to discern, but the difference is noticeable.