Connectors for electronic devices are provided with embedded antennas. The connectors may be 30-pin connectors. A 30-pin connector may have a conductive shell structure that defines a cavity and a planar dielectric member that extends into the cavity and that has contact pins. An antenna may be formed from an antenna resonating element on the planar dielectric member and an antenna ground formed from the conductive shell structure. An antenna may be formed from a slot in the conductive shell. The antenna and the pins may be electrically coupled to an electronic device using a cable.