Hunda is an uninhabited island in the Orkney archipelago in Scotland. It is 100 hectares (0.39 sq mi) in extent and rises to 42 metres (138 ft) above sea level. It is situated in Scapa Flow and connected to the nearby island of Burray by a causeway built in 1941 to stop passage of small surface craft as part of the boom defences, and thence to the Orkney Mainland via the Churchill Barriers.