Roscommon Castle
A large thirteenth-century royal castle standing open in a town park, free to walk into at any hour.
Updated 19 October 2026
Roscommon Castle was begun in 1269 by Robert de Ufford, the justiciar of Ireland, as a royal castle on a quadrangular plan with a twin-towered gatehouse and round towers at each corner - a serious piece of construction on the western edge of English control. It was fought over repeatedly: taken and slighted by the O'Connors within a few years of being built, retaken, held by the O'Connors for much of the fourteenth and fifteenth centuries, and finally reduced by Cromwellian forces in 1652. Large mullioned windows were inserted in the sixteenth century when it was converted toward domestic use, and they sit oddly in the defensive walls. What survives is a substantial shell in a public park with no gate, no ticket and no staff. The masonry is unstabilised in places, the ground inside is uneven and there are open stairs and drops.
History
The town takes its name from Commán mac Faelchon, who built a monastery here in the 5th century, and the woods around it became known as Ros Comáin, "Saint Coman's wood". The area was the homeland of the Connachta dynasty and of families such as the Ó Conchobhair (Wikipedia, Roscommon).
What you'll find
- The quadrangular plan - corner towers and a twin-towered gatehouse.
- The inserted windows - sixteenth-century mullions in defensive walls.
- The open access - a substantial castle in a public park, free at any hour.
- The siege damage - the 1652 reduction still legible in the walls.
When to go
April to October for the ground conditions. It is open at any hour with no gate. Half an hour covers the walk around and through it.
What to expect
Unstaffed and only partly stabilised - loose masonry, open drops and uneven ground. No interpretation beyond a panel. Grass is muddy after rain.
Nearby
Roscommon town centre and its Dominican priory are close; Rathcroghan is north.
What to pack for Roscommon Castle
Chosen from what this place is for. Tap a kit for the full checklist.
- Comfortable walking shoes - Sightseeing means kilometres of pavement and cobbles daily. Find on Amazon
- Modest clothing - Shoulders and knees covered - the single most common requirement. Find on Amazon
- A slim anti-theft daypack - Zips that close properly; keep it in front in crowds and on transit. Find on Amazon
- A scarf or shawl - To cover the head or shoulders on entry; women especially at mosques. Find on Amazon
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Opening times, ticket prices and seasonal closures change - check the official source before you go: official site.


