A semiconductor package includes a package substrate including a redistribution layer; a semiconductor chip disposed on the package substrate and electrically connected to the redistribution layer; a wiring structure disposed on the semiconductor chip and having an upper surface on which pads are arranged; a vertical connection structure disposed between the package substrate and the wiring structure and electrically connecting the redistribution layer and the pads; and a passivation layer disposed on the wiring structure and having openings partially exposing a region of each of the pads. The pads include a first pad adjacent to a corner of the wiring structure, and a second pad closer to a center of the wiring structure than the first pad. A first width of the first pad is greater than a second width of the second pad. A contact layer is disposed in the opening on the first pad.