Annagassan

Annagassan () is a village in the townland of Ballynagassan, County Louth, Ireland. It sits where the River Glyde enters the Irish Sea. It is approximately 13 km south of Dundalk and 18 km north of Drogheda. As of the 2022 census, Annagassan had a population of 189 people.

==History== Annagassan was first mentioned as Linn Duachaill in AD 841 when the establishment of a Viking longphort was recorded. It is unclear whether the longphort at Annagassan continued under the Dublin Viking regime after 852 since the location is not mentioned for seventy years. The longphort is estimated to have been 1.18 kilometres from north to south. Within this area, the earthwork of Lisnarann may have acted as the citadel. Thomas Wright was the first to record this area in 1748 and described it as a "Danish fort by the pass of the Llyns, upon the banks of the sea". The first material evidence of a Viking presence was a honestone discovered during a field survey of the site in a field near a laneway off Castlebellingham. In 2007, a geophysical survey was conducted that revealed a substantial anomaly spanning roughly 120 meters which likely extended the full 250 meters distance to the sea. The longphort itself was discovered in 2010 during a small research excavation.