Town

Castledermot

Díseart Diarmada

Castledermot's early church site preserves carved crosses, an unusual tower and a rare monument rediscovered during twentieth-century tidying.

Watercolour and fine ink illustration of Castledermot Round Tower and North Cross.
Illustration, Castledermot Round Tower and North Cross
Recorded locationCastledermot52.90946° N · 6.84394° 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

  • Díseart Diarmada · Irish · main form · validated name
  • Castledermot · English · main form

Place & story

The monastery's surviving stones

Castledermot's monastic settlement was established by the ninth century and associated with St Diarmuid. Its surviving monuments include cross-inscribed slabs, high crosses, architectural fragments and the round tower beside St James's Church. The church incorporates a Romanesque doorway and later medieval work within a building reconstructed in the seventeenth century. Carved stones gathered around it preserve several periods of activity on the same religious site. [2]

A tower with a ground-level door

The granite round tower differs from many Irish examples in having its entrance at ground level. Standing north of the church, it is about twenty metres tall. Later alterations changed its internal floor levels and windows, while battlements replaced the familiar pointed cap associated with other round towers. The nearby high crosses carry biblical scenes and patterned ornament, including representations of Isaac's binding and of Adam and Eve. Their carved surfaces reward close examination beside the much taller tower. [2]

People & connections

Helen Roe examines a discovery

In 1967 an unusual elongated stone emerged during tidying in St James's churchyard. Antiquarian Helen M. Roe examined it with a Board of Works official and praised rector W. H. H. Warburton for having it raised and supported. It proved to be a hogback monument, a form associated with Scandinavian-influenced communities in Britain. Warburton included it in his 1968 churchyard guide; a more detailed scholarly study followed in 1971. The discovery added an exceptional monument to an already remarkable collection of stones. [3]

Geographic information

Place type
Town
County
Kildare
Civil parish
Castledermot
Coordinates
52.90946, -6.84394
Logainm ID
1416336 ↗

Population over time

Castledermot — Census 2016 settlement footprint

Population within 2016 settlement boundaries

1,667people · 2022

05001K1.5K2K 2016: 1,475 people20162022: 1,667 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
Castledermot — Census 2016 settlement footprint — census population
Census yearPopulation
20161,475
20221,667

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.

Castledermot, Kildare — Census town, CSO 2006 report

2002–2006: census town

887people · 2006

0225450675900 2002: 726 people20022006: 887 people2006

These are the historical areas published in the 2006 census report. Boundaries may differ between censuses and from modern settlements. Legal towns, environs and suburbs are shown separately; none has been combined into a modern settlement total.

View population figures
Castledermot, Kildare — Census town, CSO 2006 report — census population
Census yearPopulation
2002726
2006887

Source: CSO C0112 — Alphabetical list of towns, populations 2002 and 2006 · Supporting source 1. CC BY 4.0. Retrieved 2026-10-25.

Castledermot, Kildare — Census town, CSO 1996 report

1991–1996: census town

733people · 1996

0200400600800 1991: 741 people19911996: 733 people1996

These are the historical areas published in the 1996 census report. Boundaries may differ between censuses and from modern settlements. Legal towns, environs and suburbs are shown separately; none has been combined into a modern settlement total.

View population figures
Castledermot, Kildare — Census town, CSO 1996 report — census population
Census yearPopulation
1991741
1996733

Source: CSO A0112 — Alphabetical list of towns, populations 1991 and 1996 · Supporting source 1. CC BY 4.0. Retrieved 2026-10-25.

Castledermot, Kildare — Census town, CSO 1986 report

1981–1986: census town

792people · 1986

0225450675900 1981: 805 people19811986: 792 people1986

Figures cover the historical town area printed in the 1986 report. Boundaries may have changed between censuses. Legal town, environs and suburb totals remain separate and differ from modern settlement boundaries.

View population figures
Castledermot, Kildare — Census town, CSO 1986 report — census population
Census yearPopulation
1981805
1986792

Source: CSO Census 1986, Volume 1, Table 10, page 48. Creative Commons Attribution 4.0 International (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.

Castledermot, Kildare

Published census settlement populations

1,475people · 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
Castledermot, Kildare — census population
Census yearPopulation
20111,398
20161,475

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

Castledermot, Co Kildare — Census 2022 Built Up Area

Built Up Area population, 2022

1,685people · 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
Castledermot, Co Kildare — Census 2022 Built Up Area — census population
Census yearPopulation
20221,685

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

Sources & further reading

  1. Logainm.ie — Castledermot. Place names and geographic record, licensed under CC BY 4.0.
  2. Castledermot Round Tower · Office of Public Works
  3. A Guide to St James' Church and Surrounding Churchyard, Castledermot · Kildare Local Studies, 9 November 2022
  4. Castledermot Round Tower and North Cross illustration: based on a Castledermot Church of Saint James Round Tower and North Cross 2013 09 04 by Andreas F. Borchert. AI-assisted watercolour and ink adaptation; cream paper margins added, incidental clutter omitted and fine details simplified. Licence: CC BY-SA 4.0.

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