A chip on film package includes a flexible base film having a first surface and a second surface opposite to each other that includes at least one through hole therein, a plurality of wirings disposed on the first surface and the second surface of the base film, respectively, that include a first lead and a second lead connected to each other through the at least one through hole, and a display panel driving chip and a touch panel sensor chip, each mounted on any one of the first surface and the second surface of the base film, wherein at least one of the display panel driving panel and the touch panel sensor chip is electrically connected to the first and second leads.