Horse racing magnate JP McManus (left) is just ahead of the Collison brothers to claim the title for Limerick.

Insulated panels company Kingspan, founded by Eugene Murtagh, is one of Ireland’s most successful listed companies. Photo: Jason Clarke Photography

Ryanair boss Michael O’Leary lives near Mullingar and has a big horse-training operation. He had a turbulent year in 2017 but remains one of the country’s wealthiest men. Photo: Getty

Limerick

Horse racing magnate JP McManus is just ahead of the Collison brothers to claim the title for Limerick.

*There are no entries from counties Fermanagh or Laois on the 2018 Rich List

Kerry

Brian McCarthy owns Killorglin-headquartered Fexco which has seen its value rocket in recent years.

Cork

Denis O'Brien is originally from Cork. He owns Digicel, a major telecoms player in the Caribbean and Asia Pacific.

Waterford

The Queally brothers Peter and John are major shareholders in the Dawn Meats group, one of the largest agri businesses in Europe.

Kilkenny

Entrepreneur Terry Clune brought AIB on board to his business Transfermate last year valuing the business at up to €300m.

Wexford

Beef baron Bert Allen and his family enjoyed a big payday when they sold Slaney Foods to Larry Goodman's ABP Foods.

Carlow

David Walsh and Niall Kelly are the majority shareholders in Carlow-based security camera and software firm Netwatch. An IPO could value the company at €250m.

Kildare

Kildare-born Ned Guinness, also known as Lord Iveagh, is one of Britain's biggest private landowners.

Wicklow

Media-shy Ryanair co-founder Declan Ryan is bringing low-cost airlines to several new markets.

Dublin

Low-profile Patsy Perin Dubash was born on Hatch St and is married to Pallonji Mistry, who, along with their children, holds an Irish passport. The family's wealth comes from its stake in conglomerate Tata.

Offaly

Stephen Grant owns around 58pc of Grant Engineering, which makes oil and solid-fuel burners and is based in Birr.

Galway

Luke and Brian Comer of Glenamaddy started off as plasterers but have built a property empire with interests in several countries.

Clare

Patrick Purcell and his family own the majority stake in London-listed mining equipment firm Mincon.

Tipperary

Although born in Cork, bloodstock billionaire John Magnier's world-renowned Coolmore Stud is based in Fethard.

Westmeath

Ryanair boss Michael O'Leary lives near Mullingar and has a big horse-training operation. He had a turbulent year in 2017 but remains one of the country's wealthiest men.

Mayo

Property investor Charlie Kenny and family are behind the Clancourt group. It has seen its value rise significantly since the crash.

Sligo

Eileen Monahan has enjoyed dividends from the Doyle Collection hotel group and is a canny property investor.

Leitrim

Raised in Ballinamore, Co Leitrim, Ray and Des O'Rourke own a chunk of construction giant, Laing O'Rourke.

Roscommon

Former Elan executive Seamus Mulligan made his money out of the biotech sector and is actively investing in new ventures.

Longford

Brothers Mike, Pat and Billy own Glennon Brothers, a major timber producer in Ireland and Scotland.

Meath

Although born in Louth, Martin Naughton now resides in Meath's Stackallan House, a classical Irish country house from the early 18th century. He built up Glen Dimplex, which now makes most of the world's home heating appliances.

Louth

Pearse Lyons made his money through animal nutrition business Alltech. More recently he has invested in a new Dublin whiskey distillery.

Down

Tom Eakin is the brains behind innovative medical device company TG Eakin.

Monaghan

Tony White emigrated to America and developed a lucrative direct marketing business. He has invested in some fine New York properties.

Tyrone

Jim and Jack Dobson sold the Irish assets of Tyrone-based Dunbia to Dawn Meats last May.

Donegal

Former motor racing journalist Paddy McNally sold his Formula One business for hundreds of millions. He owns several stunning homes in the UK and Europe.

Derry

Roma Downey and her husband Mark Burnett are hugely successful TV producers and are now making religious drama for Netflix.

Antrim

Harold Montgomery and his family own Ballyvesey, a huge trucking company which has branched out into property in the UK and Europe.

Armagh

Freddie Linnett started off as a tea girl but is now a major shareholder in a leading UK property company.

Cavan

Insulated panels company Kingspan, founded by Eugene Murtagh, is one of Ireland's most successful listed companies.

There are no entries from counties Fermanagh or Laois on the 2018 Rich List

Sunday Independent