Octave Gréard (18 April 1828 – 25 April 1904) was a noted French educator.
Gréard was born in Vire, Calvados, educated at the École Normale Supérieure, and had a long career in education. He was largely responsible for the establishment of schools for girls and played a significant role in reforming the baccalauréat.
Gréard was elected member of the Académie des sciences morales et politiques in 1875 and the Académie française in 1886. A college bearing his name is located in the VIIIe arrondissement of Paris.