Mandagout (; ) is a commune in the Gard department in southern France. The 18th-century French pharmacist, chemist and encyclopediste Jacques Montet (1722-1782) was born in Mandagout.
Mandagout has a hot-summer Mediterranean climate (Köppen climate classification Csa) closely bordering on a warm-summer Mediterranean climate (Csb). The average annual temperature in Mandagout is . The average annual rainfall is with October as the wettest month. The temperatures are highest on average in July, at around , and lowest in January, at around . The highest temperature ever recorded in Mandagout was on 28 June 2019; the coldest temperature ever recorded was on 12 January 1987.