A touch sensor includes first sensor patterns, second sensor patterns, a conductive line, and a temperature sensing electrode set. The first sensor patterns are electrically connected in a first direction. The second sensor patterns are electrically insulated from first sensor patterns and are electrically connected in a second direction different from the first direction. The conductive line is electrically connected to at least one of the first sensor patterns or at least one of the second sensor patterns. The temperature sensing electrode set is positioned between two of the first sensor patterns, is positioned between two of the second sensor patterns, or is positioned between the conductive line and at least one of the first sensor patterns and the second sensor patterns. The temperature sensing electrode set includes a first electrode and a second electrode spaced from each other.