A wrist-worn electronic device includes a lower housing, including a lower surface and a side wall formed of electrically conductive material, an upper housing including a bezel formed of an electrically conductive material, and an antenna formed by a nonconductive slot between the lower and upper housings. The nonconductive slot may be formed between a first portion of a lower surface of the bezel along a circumference of the bezel, a first portion of a top surface of the side wall along a circumference of the side wall, and electrical connections between two electrical ground terminals on the top surface of the side wall and the two electrical ground locations on the lower surface of the bezel. The antenna may be configured to transmit or receive electronic signals to determine a current geographic location or allow wireless communication with other electronic devices.