A touch display device can include a panel including a plurality of touch electrodes including a first touch electrode and a second touch electrode, the first touch electrode being adjacent to and electrically isolated from the second touch electrode; a touch sensing circuit configured to drive the panel to sense a touch or a touch position; and at least one external dummy metal disposed in a boundary region between the first touch electrode and the second touch electrode, in which the at least one external dummy metal is spaced apart from and electrically isolated from the first and second touch electrodes.