A center high mount stop lamp (CHMSL) assembly for a vehicle includes an integrated radio frequency (RF) antenna. The CHMSL assembly has an outer lens element, a lamp assembly configured to emit light through the outer lens element, and a housing for the outer lens element and the lamp assembly. The housing is adapted for attachment to an upper rear portion of the vehicle, and the housing has an interior region defined therein. The CHMSL assembly also has an RF antenna element located within the interior region. The RF antenna element is configured and positioned such that it does not obstruct a light path from the lamp assembly to the outer lens element.