placenames1901 census
94People recorded
17Households recorded
Most frequent surnames in this year’s matched records
Explore the 1901 records ↗Castlehill
Cnoc an Chaisleáin
An archaeological record preserves evidence for a former castle near Blacksod Bay.
Recorded locationCastlehill53.99365° N · 9.80225° 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
- Cnoc an Chaisleáin · Irish · main form · non-validated name
- Castlehill · English · main form
Place & story
What survived in 1838
The National Monuments Service records a castle site in Castlehill, on a slope facing an inlet of Blacksod Bay. No standing remains survive in its account. John O’Donovan’s 1838 report described visible foundations and elderly local people who remembered more substantial ruins, but he could establish neither the founder nor the last occupier. The 1838 map outlined a rectangular site beside three farm buildings; the later 1920 map retained only the castle-site notation. [2]
Seventeen occupied houses
The 1901 census records ninety-four inhabitants in Castlehill, forty-six male and forty-eight female, in seventeen occupied houses. The entry places the townland in Kilcommon parish and Ballycroy South electoral division, within Westport Union. It lists ninety-three residents in 1881 and eighty-three in 1891. These figures concern the townland, rather than the wider Ballycroy district. [3]
Geographic information
- Place type
- Townland
- County
- Mayo
- Barony
- Erris
- Civil parish
- Kilcommon
- Within
- Ballycroy South
- Coordinates
- 53.99365, -9.80225
- Mapped area
- 4.91 km²
- Logainm ID
- 36941 ↗
People & family history
Census figures refer to the matched historical census area for each year. Boundaries and spellings can change over time.
1911 census
81People recorded
15Households recorded
Most frequent surnames in this year’s matched records
- Cafferky 29
- Corrigan 20
- Grealis 8
- Sweeney 7
- Caden 3
1926 census
70People recorded
15Households recorded
Most frequent surnames in this year’s matched records
Explore the 1926 records ↗Sources & further reading
- Logainm.ie — Castlehill. Place names and geographic record, licensed under CC BY 4.0.
- Sites and Monuments Record MA044-007: Castlehill castle site, uploaded18May2021 · Jane O’Shaughnessy, Archaeological Survey of Ireland, National Monuments Service
- Census of Ireland1901: County Mayo, printed p80 · His Majesty’s Stationery Office; printed by Alexander Thom & Company, 1902
- Boundary geometry retains its source attribution and licence in the downloadable geographic record. Map tiles © OpenStreetMap contributors.
- N59 and open countryside at Castlehill near Ballycroy, County Mayo illustration: based on a Traffic stopped along N59, Castlehill 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.
Name record retrieved 2026-10-25 · Source record modified 2025-01-10. How this page was prepared.