With an area of over 930 km² (360 sq mi), the Camargue is western Europe's largest river delta. It is a vast plain comprising large brine lagoons or étangs, cut off from the sea by sandbars and encircled by reed-covered marshes. These are in turn surrounded by a large cultivated area.

Approximately a third of the Camargue is either lakes or marshland. The central area around the shoreline of the Étang de Vaccarès has been protected as a regional park since 1927, in recognition of its great importance as a haven for wild birds. In 2008, it was incorporated into the larger Parc naturel régional de Camargue.