The territory of the municipality of Séguret in the Vaucluse department extends over 5,200 acres (2,104 ha) between 410 and 1,683 ft (125 and 513 m) above sea level. The village itself is located 820 ft (250 m) high at the foot of a hill topped by the ruins of a feudal castle. It extends at the western end of the Dentelles de Montmirail in the Baronnies massif that constitutes the first advance of the Alps in the Rhône valley. The western part of Séguret consists of an alluvial plain that extends to the Ouvèze river.