Town

Castletown

Baile an Chaisleáin

Castletown grew beside a crossing of the River Nore. Its green, former flour mill and De La Salle community preserve different parts of its working and educational history.

Watercolour and fine ink illustration of Castletown Bridge over the River Nore.
Illustration, Castletown Bridge over the River Nore
Recorded locationCastletown52.97646° N · 7.49503° 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

  • Baile an Chaisleáin · Irish · main form · validated name
  • Castletown · English · main form

Place & story

Beside the Nore crossing

Samuel Lewis's 1837 account describes Castletown as a village on the River Nore and the Dublin–Limerick road. He counted fifty-nine houses and 367 inhabitants, and noted a fair on 29 June. A police station and regular petty sessions were other features of village life. Lewis also connected the place with the Fitzpatricks and the castle from which it took its name, recalling a history of control over this important riverside position. [2]

The green and riverbank

The central green gives Castletown a particularly clear shape. Two- and three-storey houses, the monastery and parish church gather around this open space, with Main Street extending eastwards towards the old main road. Along the Nore, the weir and mill race survive as part of the village's riverside setting. The council's assessment identifies the river, castle-wall remnants and green together as features that define the historic settlement. [3]

Training the De La Salle Brothers

The De La Salle novitiate moved to Castletown in November 1881, following the order's first Irish foundation at Summerhill in 1880. A junior novitiate followed in 1882, and young Brothers practised teaching at the local school. The order's own history records that its teacher-training community later moved to Waterford in 1888. The substantial monastery on Fair Green includes a three-storey range dated around 1870 and later extensions rising to four storeys, reflecting the scale of the institution that developed here. [4] [5]

The flour mill

The Nore Flour Mills at Knockanina rise through five storeys, with additional two- and three-storey ranges. The architectural inventory dates the principal mill to around 1840. Milling was already important nearby when Lewis visited in 1837: he specifically mentioned large flour and oatmeal mills. The surviving complex gives that industry a prominent physical presence beside the river, linking agricultural production with one of Castletown's largest historic buildings. [6] [2]

Geographic information

Place type
Town
County
Laois
Civil parish
Offerlane
Coordinates
52.97646, -7.49503
Logainm ID
27819 ↗

Population over time

Castletown — Census 2016 settlement footprint

Population within 2016 settlement boundaries

446people · 2022

0125250375500 2016: 436 people20162022: 446 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
Castletown — Census 2016 settlement footprint — census population
Census yearPopulation
2016436
2022446

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.

Castletown, Laois — Census town, CSO 2006 report

2002–2006: census town

314people · 2006

0100200300400 2002: 289 people20022006: 314 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
Castletown, Laois — Census town, CSO 2006 report — census population
Census yearPopulation
2002289
2006314

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

Castletown, Laois — Census town, CSO 1996 report

1991–1996: census town

294people · 1996

075150225300 1991: 291 people19911996: 294 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
Castletown, Laois — Census town, CSO 1996 report — census population
Census yearPopulation
1991291
1996294

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

Castletown, Laois — Census town, CSO 1986 report

1981–1986: census town

303people · 1986

0100200300400 1981: 307 people19811986: 303 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
Castletown, Laois — Census town, CSO 1986 report — census population
Census yearPopulation
1981307
1986303

Source: CSO Census 1986, Volume 1, Table 10, page 50. 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.

Castletown, Laois

Published census settlement populations

436people · 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
Castletown, Laois — census population
Census yearPopulation
2011418
2016436

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

Castletown, Co Laois — Census 2022 Built Up Area

Built Up Area population, 2022

454people · 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
Castletown, Co Laois — Census 2022 Built Up Area — census population
Census yearPopulation
2022454

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

Sources & further reading

  1. Logainm.ie — Castletown. Place names and geographic record, licensed under CC BY 4.0.
  2. Castletown, Upper Ossory, A Topographical Dictionary of Ireland (1837) · Samuel Lewis
  3. Section 8 Rural Settlements, Castletown, Draft Laois County Development Plan 2021–2027 · Laois County Council
  4. The history of the Institute,1875–1928, English edition of Études Lasalliennes 11 · Institute of the Brothers of the Christian Schools
  5. De La Salle Monastery, NIAH 12900506 · National Inventory of Architectural Heritage
  6. The Nore Flour Mills, NIAH 12900502 · National Inventory of Architectural Heritage
  7. Castletown Bridge over the River Nore illustration: based on a Castletown Bridge by Jonathan Thacker. AI-assisted watercolour and ink adaptation; cream paper margins added, incidental clutter omitted and fine details simplified. Licence: CC BY-SA 2.0; adapted illustration distributed under the same licence.

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