The Fort São João Baptista of Ibo (Fortaleza de São João Baptista do Ibo in Portuguese) is one of the forts built by the Portuguese Empire on Ibo Island, Cabo Delgado Province in Mozambique.

Located by the sea, unusually shaped like a poligon star, the fort was designed by António José Teixeira Tigre.

[1] It contains service buildings, capable of housing 300 men and was equipped with 15 artillery pieces.

It helped the Portuguese on Ibo resist pirate attacks from the Sakalava of Madagascar.

[4] The fort was used to shelter families whose homes were destroyed by the hurricane Kenneth in 2019.