A touch sensor and a display device including the same, in which the touch sensor includes a base layer including a first sensing area and a second sensing area, a sensing driving electrode extending along a first direction in the first sensing area and the second sensing area, a first sub-sensing electrode disposed in the first sensing area and extending along a second direction intersecting the first direction, a second sub-sensing electrode disposed in the second sensing area and extending along the second direction, a first common electrode disposed in the first sensing area, and a second common electrode disposed in the second sensing area. The first sub-sensing electrode and the second sub-sensing electrode are electrically connected to each other.