Montdardier (French pronunciation: [mɔ̃daʁdje]; Occitan: Montdardièr) is a commune in the Gard department in southern France.

The average annual rainfall is 1,487.0 mm (58.54 in) with October as the wettest month.

The temperatures are highest on average in July, at around 21.9 °C (71.4 °F), and lowest in January, at around 5.3 °C (41.5 °F).

Several quarries above Montdardier were formerly important sources of lithographic limestone.

Stone from these quarries, marketed as Vigan stone, earned an honorable mention in the Great Exhibition of 1851.