A stator for an electric motor and an electric motor including the same are provided. A stator for an electric motor according to an exemplary embodiment of the present invention includes at least one coil, and a stator core including a yoke formed in a non-circular closed loop shape with at least one straight line portion, and a slot portion extending inward from the yoke by a predetermined length, wherein the slot portion includes a plurality of first slots on which the coil is wound and a plurality of second slots on which the coil is not wound, and at least one first slot of the plurality of first slots and at least one second slot of the plurality of second slots form the same phase as each other.