Jean-Baptiste Édouard Bornet (September 2, 1828 Guérigny – December 18, 1911 Paris} was a French botanist.
He studied medicine in Paris, and in 1886 became a member of the French Académie des sciences. With Gustave Thuret, he was co-author of Notes algologiques (1876-1880) and the Études phycologiques (1878), both works being published after Thuret's death in 1875. He helped establish the nature of lichens and was the first to find the reproductive process of red algae. In the field of lichenology, he wrote Recherches sur les gonidies des lichens (1873). With Charles Flahault, he published on , Revision des Nostocacées héterocystées (1886–88).
Bornet was elected a member of the Royal Swedish Academy of Sciences in 1888. He was admitted as a Foreign Member to the Royal Society in 1910.