Castles in Ireland: 28 Most Impressive (+ Map)

The best castles in Ireland are guardians of history, their weathered walls echoing tales of ancient battles, lost loves, and legendary victories.

These historic buildings, whether covered in ivy or standing tall in a busy city, reflect the history of ancient Ireland.

Luckily, the ‘Emerald Isle’ is brimming with them—some 30,000 Irish castles stand to this day, each with its own charm.

The best castles in Ireland

Although there are plenty of things to do in Ireland, many visitors to the island have the various Irish castles at the top of their bucket lists.

Many of the most famous castles in Ireland are steeped in secrets, legends, and captivating tales of the past.

1. Dunluce Castle

Dunluce Castle can be found perched on craggy cliffs along the Antrim Coastal Route, near the Giant’s Causeway.

While there was a castle on this site since the 13th century, the current ruins date to 16th, when it was the MacDonnell clan’s stronghold.

According to legend, on a particularly stormy night in 1639, part of the castle’s kitchen next to the cliff face collapsed into the icy waters below.

Dunluce Castle gazes out over the Sea of Moyle toward Scotland, offering breathtaking views that can be appreciated from a distance or explored up close on a tour.

2. The Rock of Cashel

The Rock of Cashel in County Tipperary, one of the most famous Irish castles, has adorned countless postcards with its striking silhouette.

Often referred to as ‘Saint Patrick’s Rock’, it’s believed that it was here that Ireland’s Patron Saint converted King Aenghus in the 5th century.

The Rock of Cashel was once the seat of the High Kings of Munster and its towering form dominates the skyline as you approach the town.

While the surviving structures date primarily to the 12th and 13th centuries, the site’s history extends far deeper into Ireland’s ancient past.

3. Blarney Castle

Arguably one of the most famous castles in Ireland, Cork’s Blarney Castle is renowned for the Blarney Stone, which, according to legend, grants the gift of eloquence to those who kiss it.

The site was before 1200, initially featuring a timber structure that was replaced by a stone fortification in 1210.

The current castle was constructed in 1446 by Cormac Láidir MacCarthy, a member of the MacCarthy dynasty.

Throughout its history, Blarney Castle endured sieges during events such as the Irish Confederate Wars and the Williamite War in Ireland.

4. McDermott’s Castle

McDermott’s Castle, set on a picturesque island in Lough Key in Roscommon, is among the best castles in Ireland for those who appreciate breathtaking locations.

The island has been fortified since the 13th century, with records from 1184 detailing a lightning strike that caused a devastating fire.

The current structure features elements from various periods, including a medieval tower house that likely dates to the 16th century.

According to Legend, Una, a chieftain’s daughter, and her lover drowned here tragically, and they now rest beneath the trees.

5. Trim Castle

You’ll find Trim Castle on the shores of the ancient River Boyne in Meath, where it has been since 1176.

It occupies a 30,000 m² site and it is the largest castle in Ireland built by the Anglo-Normans.

During its hey-day, the castle served as a political and military hub, hosting parliaments and important gatherings. 

The immersive tour at Trim Castle is what makes it one of the best castles in Ireland, offering a rich blend of history and experience (and yes, this is the castle that featured in the movie ‘Braveheart’).

6. Classiebawn Castle

On the Mullaghmore Peninsula in County Sligo, you’ll find Classiebawn, one of the most iconic Irish castles, looking like something plucked straight from a Disney movie.

It was built by Viscount Palmerston, who was once Prime Minister of the UK. Construction of the castle finished in 1874 and it was built primarily from stone from Donegal.

The castle passed through a number of hands over the years. One of my biggest issues with Classiebawn is that, as it’s on private land, it’s very hard to get a good look at it.

Most of the photos that you see have been taken through a long photo lens.

7. Ross Castle

Ross Castle in Killarney stands as one of the best castles in Ireland, thanks to its location in the stunning Killarney National Park.

This 15th century structure can be found perched on the edge of Lough Leane, where it offers magnificent views of the lake, mountains and Innisfallen.

It was built by O’Donoghue Mór and, according to legend, his spirit lies in slumber beneath the nearby lake.

It’s said that on the first morning of May every 7 years, his spirit circles the lake on a white horse. You can visit Ross Castle while driving the Ring of Kerry.

8. Clough Oughter Castle

The fairytale-like Clough Oughter Castle is located in County Cavan, next to the picturesque Killykeen Forest Park.

It is, in my opinion, the most impressive castle in the country, as the setting is nothing short of spectacular.

Over the years, Clough Oughter fell under the control of many different clans. It also fell under the control of the rebels.

In 1641, the castle was seized during the Irish Rebellion and it was turned into an island fortification. Interestingly enough, at one point, it was also used as a prison.

9. Carrickfergus Castle

Few Irish castles are as well known as Carrickfergus Castle. You’ll find it in the town of Carrickfergus in Antrim, on the shores of Belfast Lough.

The castle was built in 1177 by John de Courcy and, over the years, it saw plenty of action.

In 1210, Carrickfergus was seized by King John. In 1689 it was involved in the week-long ‘Siege of Carrickfergus’.

Later, in 1760, it was looted by the French. Then, in 1797, it was used to contain prisoners of war.

10. Glenveagh Castle

There are few castles in Ireland with a location as breath-taking as Glenveagh Castle in Donegal. Built between 1867 and 1873, Glenveagh Castle is finely placed on the shores of Lough Veagh.

The castle’s location was inspired by the Victorian idyll of a romantic highland retreat and you’ll find it surrounded by mountains in Glenveagh National Park.

The construction of Glenveagh was ordered by a man from Laois named John George Adair.

Adair married his wife, an American by the name of Cornelia, and construction of what is now one of the finest Irish castles began in 1867.

11. Kilkenny Castle

Kilkenny Castle is one of Ireland’s key tourists attractions, drawing hundreds of thousands to its historic grounds each year.

Built in 1195, the castle was carefully positioned to defend a shallow stretch of the River Nore—a natural crossing point that could have been exploited by invaders.

In 1967, it was handed over to the people of Kilkenny for just £50. Its beautifully manicured grounds are perfect for a leisurely stroll, adding to its charm.

Widely regarded as one of the best castles in Ireland, it offers a rich blend of history, scenery, and heritage.

12. Bunratty Castle

Bunratty Castle is a tourist favourite, thanks to its close proximity to Shannon Airport, which makes it the first stop for many tourists flying into that corner of Ireland.

As you walk around Bunratty Castle and gaze up at its vast walls, it’s hard to not be knocked a little with the knowledge that the ground you’re walking on was once frequented by Vikings in 970.

The current Bunratty Castle was built in 1425 and it’s said to be one of the most complete castles of Ireland that remains standing today.

13. Dublin Castle

You’ll find Dublin Castle on Dame Street in Dublin City Centre on the site of a Viking Fortress.

Work on the first castle here kicked off in 1204 while Dublin was under Norman rule following the invasion of 1169.

It was built on what was previously a Viking settlement and construction was completed in 1230.

However, the only section of this original fortress that remains to this day is the Record Tower. Many of the current features were added  during the 19th century.

Related reads: Visiting Dublin? See my guides to the best castles in Dublin (and the finest castles near Dublin) along with things to do in Dublin

14. King John’s Castle

King Johns Castle sits proudly on King’s Island in the heart of Limerick City, with sweeping views over the River Shannon.

Similar to Dublin Castle, King John’s is also situated on a site that was home to a Viking settlement.

The construction of the castle was ordered by King John during 1200 and it is now widely regarded as one of Europe’s best-preserved Norman castles.

You’ll catch brilliant views from high up on the actual battlements themselves. Those who make the short climb will be treated to a 360 panorama of the city and the River Shannon.

15. Malahide Castle

Malahide Castle in County Dublin is widely regarded as one of the best castles in Ireland due to its well-preserved architecture, rich history, and picturesque grounds.

It was built on the orders of the Norman knight, Sir Richard de Talbot, after he was awarded the land in 1174 by King Henry II.

In 1185, it was given to the Talbot family, and they lived there for 791 years.

One of Malahide Castle’s most poignant stories comes from the Battle of the Boyne, when 14 members of the Talbot family sat down for breakfast in the morning. All had lost their lives by that evening.

16. Belfast Castle

The fairytale-like Belfast Castle can be found on the lower slope of Cave Hill country park in Belfast City.

Although there have been a number of castles in the city, the current structure on Cave Hill was only constructed in 1862.

Its well-preserved Scottish Baronial design makes it one of the best castles in Ireland for those seeking an authentic historical experience.

Combine the excellent tour with sightings of wildlife like long-eared owls and sparrowhawks, unique flora such as the Town Hall Clockto, and breathtaking views of the city, and you’re in for a memorable experience.

17. Cahir Castle

The incredible 13th-15th century Cahir Castle, which was once the stronghold of the Butler family, is widely regarded as one of the best-preserved castles in Ireland.

It can be found on a rocky island on the River Suir in Tipperary.

The castle was skilfully designed to be a state-of-the-art defensive castle and, over the course of many years, it was rebuilt and extended. It wasn’t until 1599 that the castle reached its current state.

A visit to Cahir Castle will immerse you in the eventful history of the castle, from when it was built from 1142 by Conor O’Brien right the way up to when it was declared a national monument.

18. Athlone Castle

Athlone Castle in County Westmeath is located in the heart of Athlone Town, a short walk from Sean’s Bar – the oldest pub in Ireland.

Like many Irish castles, Athlone Castle is perched at the side of a river – in this case, it’s the powerful River Shannon.

Athlone Castle dates back to the 13th century and it played a pivotal role in protecting the busy Athlone River crossing.

19. Birr Castle

There has been a fortress on the site of the mighty Birr Castle since 1170.

Interestingly enough, the castle is still inhabited by the same family that bought it in 1620. One of the most unique features of Birr Castle is its giant telescope.

It was built in the 1840s and for many years it was the largest telescope in the world. Between 1845-1914, people from all over the world travelled to Birr Castle to use it.

Although you can take a tour of Birr, the residential areas of the castle are not open to the public.

20. Enniscorthy Castle

Enniscorthy Castle in County Wexford is one of the more overlooked castles in Ireland.

The first castle to be built on this site was built in 1190 by Philip De Prendergast, a French Norman knight.

Prendergast’s descendants lasted here until 1370 when Art MacMurrough Kavanagh attacked Enniscorthy Castle and reclaimed what was his ancestral land. 

Fast forward to the 1798 Rebellion and Enniscorthy Castle served as a prison for the United Irishmen.

It wasn’t until the 20th century that Enniscorthy Castle managed to get a bit of peace when it became the residence of the Roche family.

21. Doonagore Castle

Doonagore Castle in Doolin in County Clare dates to the mid-16th century and is what’s known as a tower house.

The first castle here was built during the 14ht century on the site of a ring fort.

Doonagore passed through many hands over the years. In 1588, a ship from the Spanish Armada crashed near the castle. Although the 170 passengers survived, they were all hanged soon after…

The castle is privately owned and the closest you can get to it is from the road next to it. On a positive note, you can enjoy views out to the Aran Islands from its elevated position.

22. Kinbane Castle

There are near-endless castles in Northern Ireland sat in ruin at the side of cliffs!

You’ll find Kinbane Castle on a little rocky promontory that juts out into the sea known as Kinbane Head.

It was built around 1547 and, although it’s now in ruins, is well worth a visit if you’re driving along the Causeway Coastal Route.

The ruins are isolated, the castle tends to get only a handful of visitors and the scenery that engulfs you as you walk around the ruins is absolutely breath-taking.

23. Lismore Castle

Lismore Castle in County Waterford was constructed in 1185 by Prince John to guard the nearby river crossing and it originally housed Lismore Abbey.

In the 19th century, the castle was rebuilt in a Gothic style by the Duke of Devonshire, with contributions from renowned architects and designers.

While Lismore is one of several privately owned Irish castles and not open to the public, you can explore its magnificent gardens that stretch across 7 lush acres.

24. Ashford Castle

The very swanky 800-year-old Ashford Castle is one of the most luxurious castle hotels in Ireland.

Once a privately owned medieval castle, Ashford is now a luxury hotel and is part of the celebrated ‘Leading Hotels of the World’ group.

Now, you don’t have to stay here to visit – you can enter the grounds (for a fee) and head for a ramble.

Previously owned by the Guinness family, Ashford Castle featured heavily as a backdrop in the movie the Quiet Man, along with nearby Cong.

25. Leap Castle

Leap Castle in County Offaly is believed to date to around 1250 AD and it is widely regarded as one of the most haunted castles in Ireland.

Legend has it that a lady in red prowls the castle with a silver blade at night.

Another reason the castle is believed to be haunted is due to a discovery made in the early 1900s.

A secret dungeon was found behind a wall in the chapel that contained hundreds of human skeletons.

26. Adare Castle

The impressive ruins of Adare Castle in Limerick are located at the edge of Adare Town.

It was built during the 12th-century on the site of an ancient ring fort.

The castle boasts a strategic position on the River Maigue’s banks and, like numerous Irish castles, it was constructed in the Norman style.

It’s position on the river allowed its rulers to keep control of the traffic that was zipping in and out of the Shannon Estuary.

27. Blackrock Castle

Blackrock Castle in County Cork is one that tends to get missed by many visitors.

This impressive structure is a handy 2km from Cork City, where it’s sat right next to the River Lee.

This castle dates to the 16th century and it was originally built to protect upper Cork Harbour and port from intruders.

Fast forward a few hundred years later and the castle is now home to an international award-winning science centre that’s open to the public.

28. Donegal Castle

And last but by no means least in this guide to the best castles in Ireland is the impressive Donegal Castle.

It stands proudly in Donegal Town, a testament to the remarkable possibilities of careful restoration.

Donegal Castle was built in 1474 by the O’Donnell’s. However, over the years it fell to ruin.

In fact, it decayed for two centuries until it was restored in the 1990s – it’s now one of the most impressive castles in Donegal.

Explore beyond the Irish castles

If you’ve had your fill of Irish castles, or if you’d like to see what else Ireland has to offer, here are some guides to get stuck into (don’t forget, you’ll find the world’s largest collection of Irish Road Trip itineraries right here):

• The Dingle Peninsula: A go-to on most Irish Road Trips for a reason
• The Causeway Coastal Route: An epic spin along the Antrim Coast
• The Beara Peninsula: A glorious scenic drive that straddles Cork and Kerry