Population centre

Annagassan

Áth na gCasán

Annagassan’s nearby excavated Viking site and five-arched stone bridge reveal different periods of life beside the Glyde.

Watercolour and fine ink illustration of Annagassan Bridge, County Louth.
Illustration, Annagassan Bridge, County Louth
Recorded locationAnnagassan53.88213° N · 6.34445° WInteractive map supplied by OpenStreetMap.
Recorded place location · Logainm.ie

The name

These Irish name elements are associated with this record in the Logainm glossary.

An element’s translation is a clue, rather than a complete explanation of the name. Its form and meaning depend on local history and the full Irish name.

Recorded forms

  • Áth na gCasán · Irish · main form · validated name
  • Annagassan · English · main form

Place & story

Finding Linn Duachaill

The search for the Viking longphort of Linn Duachaill led archaeologists to ground beside the Glyde about a kilometre north of Annagassan. A 2007 geophysical survey preceded trial excavations in September 2010. Mark Clinton's report records a substantial defensive ditch, approximately five metres wide and three metres deep, with traces of an internal bank. Other trenches uncovered cobbled surfaces, drains and pits, giving physical evidence for the fortified riverside site. [2]

Evidence of ships and exchange

The 2010 excavations also recovered clinker nails and roves, fittings associated with the construction of overlapping-plank ships. Metalworking debris connected the enclosure with practical craft activity. Two pieces of cut silver, a lead weight and a possible fragment of scales suggested exchange and the handling of valuable materials. A loom weight and copper-alloy objects added evidence of activities beyond fortification. These were excavated finds, distinct from later stories about the Vikings. [2]

The five-arched bridge

At the village's southern approach, Annagassan Bridge carries the road over the Glyde. The architectural inventory dates the limestone crossing to around 1800. Its five rounded arches have dressed stone surrounds, and pointed cutwaters on both sides of the piers carry conical caps. Rubble parapets contrast with the more carefully finished stonework. The bridge preserves a later phase in the locality's long dependence on river crossings and coastal routes. [3]

Geographic information

Place type
Population centre
County
Louth
Barony
Ardee
Civil parish
Drumcar
Coordinates
53.88213, -6.34445
Logainm ID
132301 ↗

Population over time

Annagassan — Census 2016 settlement footprint

Population within 2016 settlement boundaries

213people · 2022

075150225300 2016: 201 people20162022: 213 people2022

Both counts use the 2016 settlement boundary, allowing like-for-like comparison. CSO supplies the 2022 count on this older boundary for comparison only. The official 2022 Built Up Area has different boundaries.

View population figures
Annagassan — Census 2016 settlement footprint — census population
Census yearPopulation
2016201
2022213

Source: CSO Census 2022 Profile 1 — Appendix Table 1: Census 2022 De Facto Population for the 2016 Towns · Supporting source 1. CC BY 4.0. Retrieved 2026-10-25.

Other census areas and years

These figures use different area definitions. Read the boundary note before comparing them.

Annagassan, Louth

Published census settlement populations

201people · 2016

Settlement boundaries changed during this period. Differences may reflect boundary changes as well as population change. Where a 2011 legal-town-and-environs count is shown, it has not been recalculated onto the 2016 settlement boundary.

View population figures
Annagassan, Louth — census population
Census yearPopulation
2011180
2016201

Source: CSO E2016 — Population and Actual and Percentage Change 2011 to 2016. CC BY 4.0. Retrieved 2026-10-25.

Annagassan, Co Louth — Census 2022 Built Up Area

Built Up Area population, 2022

189people · 2022

Built Up Areas use a new land-use definition. Their population figures cannot be compared directly with Census 2016 settlement counts.

View population figures
Annagassan, Co Louth — Census 2022 Built Up Area — census population
Census yearPopulation
2022189

Source: CSO F1015 — Population, Census 2022 Built Up Areas. CC BY 4.0. Retrieved 2026-10-25.

Sources & further reading

  1. Logainm.ie — Annagassan. Place names and geographic record, licensed under CC BY 4.0.
  2. 2010:468 Linns, licence 10E0329 · Mark Clinton, Archer Heritage Planning; Excavations.ie
  3. Annagassan Bridge: NIAH 13901507 · National Inventory of Architectural Heritage
  4. Annagassan Bridge, County Louth illustration: based on a Annagassan Bridge by Jonathan Billinger. AI-assisted watercolour and ink adaptation; cream paper margins added, incidental clutter omitted and fine details simplified. Licence: CC BY-SA 2.0.

Name record retrieved 2026-10-25 · Source record modified 2025-01-10. How this page was prepared.