The Kandreho Formation is an Early Jurassic (middle or late Toarcian) geological formation of the Mahajanga Basin of Madagascar.

The marly limestones of the formation were deposited in a subtidal lagoonal environment.

The formation overlies the Bouleiceras and Spiriferina beds of the early Toarcian and has been correlated to the Marrat Formation of Saudi Arabia.

[1] Fossils of the marine crocodylian "Steneosaurus" as well as bivalves and the ammonite Nejdia have been found in the formation.

[2][3] The name Kandreho Formation was proposed by Geiger in 2004.