A display device includes a plurality of gate lines, data lines, first external gate tracking lines, and second external gate tracking lines. The first external gate tracking lines are substantially disposed in a border region of a substrate, and electrically connected with corresponding gate lines. The second external gate tracking lines are substantially disposed in the border region of the substrate, and electrically connected with corresponding gate lines. One of the first external gate tracking lines and a corresponding second external gate tracking line at least partially overlap with each other.