A semiconductor package includes a first redistribution substrate, a passive device mounted on a bottom surface of the first redistribution substrate, a first semiconductor chip disposed on a top surface of the first redistribution substrate, the first semiconductor chip including a through via disposed therein, a second semiconductor chip disposed on the first semiconductor chip, and a conductive post disposed between the top surface of the first redistribution substrate and a bottom surface of the second semiconductor chip and spaced apart from the first semiconductor chip. The conductive post is connected to the first redistribution substrate and to the second semiconductor chip. The conductive post overlaps with at least a portion of the passive device in a vertical direction normal to the top surface of the first redistribution substrate.