Jacques-Gérard Milbert was a French naturalist and artist.
Milbert was a pupil of the landscape painter Pierre-Henri de Valenciennes, and went on to teach drawing at the Parisian school of mines – the École nationale supérieure des mines de Paris – from 1795.
In 1800, Milbert embarked on Nicolas Baudin's voyage to Australia. During the voyage, Milbert and several other artists became ill, and the artists and the captain came into conflict. This caused several artists, including Milbert, to leave the voyage at Mauritius, leaving Charles-Alexandre Lesueur to produce the voyage's scientific drawings. Milbert returned to France, where in 1812 he published a series of views of Mauritius, the Cape Colony and Tenerife, titled Voyage pittoresque à l'Ile de France, au Cap de Bonne Espérence et à l'Ile de Ténériffe, comprising two octavo volumes of text, and one quarto volume of plates.
In 1815, Milbert travelled to the United States, where he would remain for eight years, based in New York City, teaching, and travelling extensively in the northeastern United States.