Burgh Castle is a village on the River Waveney, near Great Yarmouth, Norfolk, England within The Broads National Park. It is also one of several Roman forts that were built as a defence against Saxon raids up the rivers of the east and south coasts of southern Britain (the Saxon Shore).

The Roman fort was known as Garrianonum. Its garrison consisted of a detachment of the elite troops of the Stablesian auxiliary cavalry.

Nine miles north east is another Roman castle at Caister.

In AD 630, the Irish monk Fursey settled at Burgh Castle and started a monastery with the support of King Sighebert .

The ruins of Burgh Castle are in the care of English Heritage. They afford good views over Breydon Water, the Halvergate Marshes and Berney Arms windpump .