Fortim de São José do Ibo, Colonial fort in Ibo District, Mozambique.

Fortim de São José do Ibo is a rectangular fort built in 1764 beside the harbour of Ibo Island, in Cabo Delgado Province, Mozambique. Its corners facing the sea carry watchhouses, and inside were the troops' barracks and a warehouse, armed with seven small-calibre iron guns.

Built in 1764 as the first fort on Ibo Island, it was initially named Fort Santa Bárbara by governor Caetano Alberto Júdice to defend Portuguese settlers and trade against French, English and Madagascar pirates. It became known as São José by 1809 and lost its military role after Fort São João Baptista was built in 1791. The Mozambican Historical Monuments and Relics Commission restored it in 1945, demolishing buildings erected between 1899 and 1900.

The fort's name changed from Santa Bárbara to São José by 1809, reflecting the Portuguese administration of governor Caetano Alberto Júdice, who ordered its construction. Islanders and visitors still call it Fortim de São José do Ibo, and the small iron guns and sea-facing watchhouses show how the harbour trade was guarded.

The fort is only accessible via Ibo Island, which requires traveling by boat from the mainland coast. The best time to visit is during the dry season from May to October when weather is more reliable.

Inside the fort stand two pavilions covered with flat stone slabs that once provided cool refuge during the hottest parts of the day. This detail reveals how builders considered the comfort of occupants alongside purely defensive purposes.