Lamu Fort is a fortress in the town of Lamu in northeastern Kenya. Originally situated on the waterfront, the fort today it is located in a central position in the town, about 70m from the main jetty on the shore. The powerfully built two-story stone building contrasts with the Swahili architecture of the other buildings in the town.
Lamu Fort was built between 1813 and 1821 with Omani assistance. Initially it provided a base from which the Omanis consolidated their control of the East African coast but the town later lost its economic importance. During the British colonial period, and after the independence of Kenya, the fort was used as a prison. Today it houses an environmental museum and library, and is often used for community events.