Few places in Ireland contain more medieval buildings than the heritage town of Trim. Trim Castle is foremost among those buildings.
In fact, the castle is the largest Anglo-Norman fortification in Ireland. Hugh de Lacy and his successors took 30 years to build it.
The central fortification is a monumental three-storey keep. This massive 20-sided tower, which is cruciform in shape, was all but impregnable in its day. It was protected by a ditch, curtain wall and water-filled moat.
Modern walkways now allow you to look down over the interior of the keep – a chance to appreciate the sheer size and thickness of the mighty castle walls.
The castle is often called King John’s Castle although when he visited the town he preferred to stay in his tent on the other side of the river. Richard II visited Trim in 1399 and left Prince Hal later Henry V as a prisoner in the castle.
November – February Open Weekends Only 09:00 – 16:00.
8 February – 4 November Open Daily
Please note that all groups must be pre-booked.
Average Length of Visit: 1 – 2 hours
Seasonal Opening Times
- 8 February – 16 March
09:30 – 16:30
- 17 March – 30 September
10:00 – 17:00
- 1 October – 31 October
09:30 – 16:30
- 1 November – 4 November
09:00 – 16:00
Please note that this is a very busy site and visitors may experience a delay during the summer months. Access cannot be guaranteed. Please arrive early to avoid disappointment.
Access for visitors with disabilities is very restricted. Please note that some of the stairs in the keep are very steep and narrow. The keep is not accessible for visitors with disabilities and there is restricted access to the grounds only. There are interpretation panels in the grounds of the castle which allow for self-guiding.
On street parking. Max 2 hours. Paid ticket required
046 943 8619 or 046 943 8964
- Gift Shop
- Guided tours
- River Walk
- Walking trails
- Assistance dogs only
- Limited Access
- No climbing
Nearby sites to visit
Hill of Tara
Experience the legacy of the high kings
Approx. 12.0 km from Trim Castle
A glimpse of life in a Norman fortress
Approx. 23.2 km from Trim Castle
Brú na Bóinne Visitor Centre (Newgrange and Knowth)
Step into Ireland’s richest archaeological landscape
Approx. 27.2 km from Trim Castle