Semiconductor packages having through electrodes and methods for fabricating the same are provided. The method may comprise providing a first substrate including a first circuit layer, forming a front mold layer on a front surface of the first substrate, grinding a back surface of the first substrate, forming a first through electrode that penetrates the first substrate to be electrically connected to the first circuit layer, providing a second substrate on the back surface of the first substrate, the second substrate including a second circuit layer that is electrically connected to the first through electrode, forming a back mold layer on the back surface of the first substrate, the back mold layer encapsulating the second substrate, and removing the front mold layer.