County Offaly

Clonmacnoise on the Shannon and Birr's telescope are the two great stops, with bog, canal and the Slieve Bloom foothills between them. A heritage county that rewards a planned day.

County Offaly facts

Province: Leinster
County town: Tullamore
Setting: Inland
Touring region: Ireland's Ancient East
Best for: history, castles, hiking, family, scenic drives
Places in the planner: 4

County Offaly, in the heart of the midlands, pairs important heritage with classic bog and river landscapes. Clonmacnoise, the great early Christian monastery where the Shannon meets the Esker Riada, is one of Ireland's most evocative sites, while Birr pairs a castle and science centre with a pretty heritage town.

The Shannon forms the county's western border, the Grand Canal crosses it at Tullamore, a town long associated with whiskey, and the Slieve Bloom Mountains rise in the south. Lough Boora Discovery Park shows how cutaway bog can be reborn as parkland, sculpture and wildlife habitat. The county rewards a heritage-focused itinerary: a morning at Clonmacnoise while the Shannon is quiet, an afternoon in Birr's gardens, and a canal-side evening in Tullamore. It is also an easy, scenic link between the east coast and Galway or the Shannon.

Top sights in Offaly

Clonmacnoise

An early Christian monastic city of churches, high crosses and round towers on the Shannon.

Birr Castle Demesne

A castle estate with famous gardens and the historic Great Telescope.

Lough Boora Discovery Park

Parkland, lakes and sculpture trails created on former industrial bog.

Tullamore and the Grand Canal

The county town, with canal walks and a whiskey heritage centre.

Clara Bog

One of Ireland's best-preserved raised bogs, with a boardwalk and visitor centre.

Towns & cities in Offaly

Tullamore

The Grand Canal made this town, and the harbour, locks and towpath still run through its centre. Tullamore is the county town of County Offaly.

Birr

The Great Telescope in the castle grounds was the largest in the world for decades, built by the Earl of Rosse in the 1840s. Birr grew up around the castle, and its Georgian malls keep the planned look.

Edenderry

Canal town in the east of the county.

Clara

Small town known for its bog and jute-weaving history.

Best time to visit

Spring to autumn is best for gardens, bog parks and monastery visits. Birr's gardens are a highlight from spring bulbs through autumn colour.

Getting there

Tullamore is about an hour west of Dublin by motorway and on the main rail line. Dublin Airport is the nearest airport.

Places for your trip

Tullamore: The Grand Canal made this town, and the harbour, locks and towpath still run through its centre. Tullamore is the county town of County Offaly.
Clonmacnoise: Saint Ciaran founded the monastery in the 6th century, on the River Shannon where it meets the Esker Riada. Crosses, churches and round towers fill the site.
Birr: The Great Telescope in the castle grounds was the largest in the world for decades, built by the Earl of Rosse in the 1840s. Birr grew up around the castle, and its Georgian malls keep the planned look.
Birr Castle: Birr Castle is known for its gardens and the Great Telescope built in the 1840s by the Earl of Rosse.

What's on

No anchor festival is based here, but the Irish year is full: next up nationally is TradFest (20–24 Jan 2027, Temple Bar, Dublin). See the full events calendar

Nearby counties