A semiconductor package including a first substrate including first upper pads, the first upper pads on a top surface of the first substrate, a second substrate including second upper pads, the second upper pads on a top surface of the second substrate, a pitch of the second upper pads being less than a pitch of the first upper pads, and a first semiconductor chip on and electrically connected to both (i) at least one of the first upper pads and (ii) at least one of the second upper pads may be provided.