Alumni
Media / communications
- Úna-Minh Caomhánach, journalist and writer
- Rory Carroll, news correspondent, The Guardian newspaper
- Matt Cooper, presenter of The Last Word; Today FM; Sunday Times columnist
- Noel Curran, former Director General of RTÉ
- Richard Curran, presenter of Dragons' Den ; columnist for Sunday Independent
- Mark Little, founder of Storyful; former CEO of Ireland Twitter; e- US correspondent and presenter of Prime Time, RTÉ
- John Mulholland, Editor of The Observer
- Breda O'Brien, columnist (Mater Dei Institute)
- Kevin O'Sullivan, Editor of Irish Times
- Caitríona Perry, journalist and co-anchor for RTÉ
- Sean Whelan, Economics Editor, RTÉ
- Beth Boylan, businesswoman
Arts
- Declan Buckley, television personality
- Marina Carr, author and playwright
- Finghin Collins, pianist
- John Connolly, author
- Neil Delamere, comedian
- Uaneen Fitzsimons, television presenter and DJ
- Breandán de Gallaí (Brendan Galway), Riverdance dancer
- Hazel Hayes, author, filmmaker, and YouTuber
- Patrick McCabe (SPD), novelist
- John McGahern (SPD)
- Caroline Morahan, RTÉ's Off the Rails , Fair City
- Barry Murphy, actor, comedian
- Ardal O'Hanlon, comedian, known for Father Ted
- Dearbhla Walsh, television director and Emmy Award winner
- Laura Whitmore, MTV UK presenter
- Don Wycherley (SPD)
Business
- John Hourican, banker, CEO of the Bank of Cyprus [1]
- Albert Manifold, CEO of CRH plc
- Brody Sweeney, CEO and founder of O'Briens Irish Sandwich Bars [2]
- Lorraine Twohill, Chief Marketing Officer of Google
Law, politics, and government
- Rotimi Adebari, Ireland's first black mayor, Portlaoise [3]
- Clare Daly, TD, Dublin North 2016–2019, MEP 2019–
- Seán Dorgan, General Secretary of Fianna Fáil
- Brendan Howlin (SPD), Labour Party Teachta Dála
- Enda Kenny (SPD), Teachta Dála, Taoiseach 2011–2017, Leader of Fine Gael 2002–2017
- Conor Lenihan, Fianna Fáil Teachta Dála; former Minister of State
- Mary Lou McDonald MEP, TD Teachta Dála, Deputy Leader of Sinn Féin since February 2009
- Helen McEntee, TD, Fine Gael, Meath-East and Minister of State for Health - Older People
- Rónán Mullen, former Senator
- Kathleen O'Meara, former Senator
- Kathryn Reilly, former Sinn Féin Senator
- Noel Rock, former Fine Gael TD
- Brendan Ryan
- Duncan Smith, Labour TD
Sportspeople
DCU GAA
Ireland international rules football team players
Senior inter-county footballers
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Dublin
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Cavan
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Cork
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Donegal
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Galway
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Kildare
- Laois
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Louth
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Mayo
- Meath
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Roscommon
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Sligo
Senior inter-county ladies' footballers
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- Mayo
Senior inter-county hurlers
Ireland men's rugby union internationals
Ireland women's rugby union internationals
Ireland men's field hockey internationals
Ireland women's field hockey internationals
Others
- Kevin Hunt, Bohemians captain
- Fionnuala McCormack, European cross country champion
- Ger McDonnell, reached the summit of Everest in May 2003
- Ciara Peelo, Olympic sailor, Beijing 2008
- Darren Sutherland, bronze medalist boxer, Beijing Olympic Games, 2008
- John Tierney, Ireland Australian rules football international
- Seán Óg Ó hAilpín, Ireland shinty–hurling international