A semiconductor package includes a package substrate including a first region, a thermal block penetrating the first region and exposed at top and bottom surfaces of the package substrate, a semiconductor chip on the package substrate, bumps disposed between the package substrate and the semiconductor chip and including first bumps being in contact with the thermal block, and terminals disposed on the bottom surface of the package substrate and including first terminals being in contact with the thermal block. The thermal block is one of a power path and a ground path.