Alphonse Briart (1825–1898) was supervisor of the coal mines at Bascoup and Mariemont near Morlanwelz in the Hainaut province of Belgium, and a geologist who studied that region.

During the period 1863–1896 he and Francois Cornet published a number of books and papers describing fossils and geological structures found near Mons.

Briart was born at Chapelle-lez-Herlaimont, then in the United Kingdom of the Netherlands on 25 February 1825, the son of a military surgeon.

In 1867, together with Cornet and A. Houzeau de Lehaie, Briart undertook the excavation of the Neolithic flint mines of Spiennes, and at nearby Mesvin, during the construction of the railway line between Mons and Charleroi.

His paleontological collection was acquired by the École des Mines de Mons.