Town

Castlefinn

Caisleán na Finne

Castlefinn's Diamond, riverside trading history and surviving railway structures record several ways in which the town connected the Finn Valley with wider markets.

Watercolour and fine ink illustration of St Mary's old Church, Castlefinn.
Illustration, St Mary's old Church, Castlefinn
Recorded locationCastlefinn54.80360° N · 7.59090° 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

  • Caisleán na Finne · Irish · main form · validated name
  • Castlefinn · English · main form
  • Castlefin · English · main form · local name

Place & story

A surviving feature of the Diamond

The cast-iron pump at the southern end of the Diamond dates from about 1885. Its banded shaft, fluted cap and curved handle turn an everyday piece of water-supply equipment into a distinctive feature of the square. A Lawrence Collection photograph from around 1890 shows it immediately south of the market house, which has since disappeared. Although the pump has been repositioned, it preserves part of the setting in which residents collected water and traders gathered. Its survival helps locate an older public centre within the present town. [2]

People & connections

Doctor Francis Rogan's riverside trade

The town's community heritage account records Doctor Francis Rogan as a landowner who sought to develop Castlefinn's commercial facilities. A surgeon associated with Derry, he travelled to his Castlefinn property by boat and built a small quay near the bridge. He also provided a grain store with a drying kiln and a market yard. The account places these improvements within a period when river transport connected the town with Strabane and Derry. Rogan's combination of medical work, property ownership and investment in trade forms a distinctive local link between the town and the wider Foyle region. [3]

Traces of the Finn Valley Railway

The railway between Strabane and Stranorlar opened in September 1863. Near the former Castlefinn station, a stone bridge carried a road over the line. Its rounded arch, dressed stonework and contrasting masonry remain evidence of the engineering investment, although the railway tracks have gone and the opening has been partly filled. Passenger services on this section ended on 1 January 1960, followed shortly afterwards by goods traffic. The bridge and surviving station buildings therefore belong to a transport system that served the town for nearly a century before road travel took its place. [4]

Geographic information

Place type
Town
County
Donegal
Civil parish
Donaghmore
Coordinates
54.80360, -7.59090
Logainm ID
1414068 ↗

Population over time

Castlefin — Census 2016 settlement footprint

Population within 2016 settlement boundaries

727people · 2022

0200400600800 2016: 705 people20162022: 727 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
Castlefin — Census 2016 settlement footprint — census population
Census yearPopulation
2016705
2022727

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.

Castlefin, Donegal — Census town, CSO 2006 report

2002–2006: census town

810people · 2006

0225450675900 2002: 783 people20022006: 810 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
Castlefin, Donegal — Census town, CSO 2006 report — census population
Census yearPopulation
2002783
2006810

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

Castlefin, Donegal — Census town, CSO 1996 report

1991–1996: census town

698people · 1996

0175350525700 1991: 692 people19911996: 698 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
Castlefin, Donegal — Census town, CSO 1996 report — census population
Census yearPopulation
1991692
1996698

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

Castlefin, Donegal — Census town, CSO 1986 report

1981–1986: census town

694people · 1986

0200400600800 1981: 748 people19811986: 694 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
Castlefin, Donegal — Census town, CSO 1986 report — census population
Census yearPopulation
1981748
1986694

Source: CSO Census 1986, Volume 1, Table 10, page 70. 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.

Castlefin, Donegal

Published census settlement populations

705people · 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
Castlefin, Donegal — census population
Census yearPopulation
2011787
2016705

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

Sources & further reading

  1. Logainm.ie — Castlefinn. Place names and geographic record, licensed under CC BY 4.0.
  2. Castlefinn: water pump, registration 40840020 · National Inventory of Architectural Heritage
  3. Town History · Castlefinn Town and Village Project, historical address reproduced on community heritage site
  4. Castlefinn: former railway bridge, registration 40840030 · National Inventory of Architectural Heritage
  5. St Mary's old Church, Castlefinn illustration: based on a St Mary's old Church, Castlefinn (1878 - 1978) by Kenneth Allen. 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.