Antoine Émile Ernest Desjardins (French pronunciation: [ɑ̃twan emil ɛʁnɛst deʒaʁdɛ̃]; 30 September 1823 – 22 October 1886) was a French historian, geographer and archaeologist.

He was a younger brother of historian Abel Desjardins (1814–1886).

In 1856 he began teaching classes in Latin epigraphy at the Lycée Napoleon in Paris, and from 1861 taught courses in geography at the École Normale Supérieure.

For several years he conducted archaeological research in Italy, Egypt and regions along the Danube.

[1][2] In 1886, he was appointed professor of epigraphy and Roman antiquities at the Collège de France.