placenames.ie
Townland

Johnstown

Baile Sheáin

Johnstown near Rathcoole retains evidence of an older personal name and later agricultural architecture.

Recorded locationJohnstown53.25844° N · 6.50835° WInteractive map supplied by OpenStreetMap.
Recorded place location · Logainm.ie

The name

bailetownland, town, homestead

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 Sheáin · Irish · main form · validated name
  • Johnstown · English · main form

Place & story

The John behind the name

South Dublin County Council’s placenames study associates this Johnstown with John, son of John de Penris, recorded in 1236. It traces the surname Penris to the Welsh place Pen-rhys. This is a documented explanation offered for Johnstown in Rathcoole parish, rather than a translation inferred from the modern Irish name or an explanation for every Johnstown. [2]

An octagonal working complex

The architectural inventory records former offices and animal accommodation at Johnstown House on an octagonal plan, dated to around 1800. A double-height pointed entrance has a granite surround. Pinnacles and further gateways give the working buildings a deliberately ornamental treatment, while sheds record the estate’s agricultural functions. [3]

The estate’s water mill

A separate former water mill also dates to around 1800 in the survey. A cast-iron wheel survives against its north-eastern elevation. Pointed ground-floor arches and diamond-shaped upper openings combine decorative architecture with a practical industrial building. By the survey, parts were being used as animal sheds. [4]

Geographic information

Place type
Townland
County
Dublin
Barony
Newcastle
Civil parish
Rathcoole
Within
Rathcoole
Coordinates
53.25844, -6.50835
Mapped area
1.33 km²
Logainm ID
16681 ↗

People & family history

Census figures refer to the matched historical census area for each year. Boundaries and spellings can change over time.

Sources & further reading

  1. Logainm.ie — Johnstown. Place names and geographic record, licensed under CC BY 4.0.
  2. South Dublin Placenames and Streetnames,p8 · Pádraig Ó Cearbhaill with Sara Ní Chonchúir, South Dublin County Council
  3. Johnstown House:octagonal offices,NIAH11217011 · National Inventory of Architectural Heritage
  4. Johnstown House:former water mill,NIAH11217009 · National Inventory of Architectural Heritage
  5. Boundary geometry retains its source attribution and licence in the downloadable geographic record. Map tiles © OpenStreetMap contributors.

Name record retrieved 2026-10-25 · Source record modified 2024-06-28. How this page was prepared.