A multi-touch decision apparatus, method, and medium are provided. The apparatus includes a sensor to sense an object contacting a specific position corresponding to one among a plurality of sensing channels arranged in a predetermined array, a detector to detect at least one of information about signal strength of the sensing channel in which the object is sensed and information about the number of sensing channels having a signal strength exceeding a first threshold, and a controller to determine whether a single touch or a multi touch has been sensed based on the detected information.