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List of public sector organisations in Dublin

Tamtam tracks 41 public sector organisations headquartered in Dublin. This list ranks the 30 largest by number of employees on LinkedIn, led by University College Dublin, Trinity College Dublin and ESB. Their median headcount is 987. Half of them were founded in 1987 or later.

🇮🇪 Dublin30 companiesUpdated Nov 11, 2026

These Dublin-based public sector organizations primarily span education, healthcare, and utilities. The list includes large established entities like University College Dublin, a research-intensive university founded in 1854, and Trinity College Dublin, recognized globally for academic excellence since 1592. Also featured are ESB, providing secure and sustainable electricity, and Beaumont Hospital, a leading teaching hospital. The Central Bank of Ireland safeguards monetary stability, while Enterprise Ireland supports Irish businesses in international markets.

A notable pattern among these organizations is their long-standing presence; many were founded in the 19th or early 20th centuries. The concentration of headquarters in Dublin highlights the city's role as a central hub for public services and administration in Ireland.

#CompanyIndustryHeadquarters EmployeesFounded
1
University College Dublinucd.ie

Research-intensive university offering undergraduate, masters, PhD education, fostering innovation, global engagement, and diverse academic disciplines across multiple campuses.

Higher Education 🇮🇪 Dublin 8,585 1854
2
Trinity College Dublintcd.ie

Leading Irish university offering world-class education and research, recognized globally for academic excellence and high international rankings.

Higher Education 🇮🇪 Dublin 7,268 1592
3
ESBesb.ie

A company focused on providing secure, sustainable, and affordable electricity supplies to enhance societal, economic well-being, driven by innovation and collaboration for a brighter future

Utilities 🇮🇪 Dublin 4,937 1927
4
Beaumont Hospitalbeaumont.ie

A leading teaching hospital associated with RCSI Hospital Group, serving as a designated cancer and regional treatment center with strong academic links

Hospitals and Health Care 🇮🇪 Dublin 3,349 n/a
5
An Postanpost.com

Provides postal, communication, retail, and financial services across Ireland with a large national network and over 10,000 employees.

Utilities 🇮🇪 Dublin 3,117 n/a
6
St James's Hospital Dublinlinkin.bio

An academic teaching hospital delivering health treatment, care, and diagnosis while prioritizing education, research, and collaboration with a focus on quality and accountability

Hospitals and Health Care 🇮🇪 Dublin 2,788 n/a
7
RTErte.ie

Ireland's national public service media offering radio, television, online, and mobile services, with impartial, creative, high-quality programming for diverse audiences

Media Production 🇮🇪 Dublin 2,741 1926
8
Uisce Éireann Irish Waterwater.ie

National water utility ensuring secure, safe, and sustainable water services in Ireland by delivering quality drinking water and treating wastewater responsibly

Utilities 🇮🇪 Dublin 2,229 2013
9
Iarnród Éireann Irish Railirishrail.ie

The national railway system operator in Ireland, providing intercity, commuter, and freight services within the Republic of Ireland and to Belfast

Rail Transportation 🇮🇪 Dublin 2,157 1987
10
Central Bank of Irelandcentralbank.ie

Safeguarding monetary and financial stability, ensuring financial system benefits consumers and economy, maintaining independence and public trust.

Banking 🇮🇪 Dublin 1,983 1943
11
Enterprise Irelandenterprise-ireland.com

Supporting Irish enterprises in international markets through development, growth, innovation, and export sales to drive employment and economic growth

International Trade and Development 🇮🇪 Dublin 1,475 n/a
12
Children’s Health Ireland (CHI)childrenshealthireland.ie

A leading children's hospital in Ireland with over 280 beds and 39 specialties, offering educational opportunities, support for career development, and various employee benefits

Hospitals and Health Care 🇮🇪 Dublin 1,430 1956
13
Dublin Bus (Bus Átha Cliath)dublinbus.ie

Leading public transport provider in Ireland with a fleet of over 1000 buses operating on 125 routes, employing 3,600 people from 71 countries

Ground Passenger Transportation 🇮🇪 Dublin 1,126 1987
14
ESB Networksesbnetworks.ie

A subsidiary of ESB Group in Republic of Ireland operating and maintaining electricity distribution system, facilitating competitive market, and investing in network development

Utilities 🇮🇪 Dublin 1,113 1927
15
SOLAS (An tSeirbhís Oideachais Leanúnaigh agus Scileanna)solas.ie

Leading authority in Ireland for funding, planning, and coordinating training programs, ensuring high-quality education for jobseekers and learners through partnerships with stakeholders

Education Administration Programs 🇮🇪 Dublin 987 n/a

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16
Bus Éireannbuseireann.ie

A major provider of bus transportation services in Ireland, offering a wide range of inter-urban, city, commuter, school, and local bus services

Ground Passenger Transportation 🇮🇪 Dublin 910 1987
17
Fáilte Irelandfailteireland.ie

The company supports and promotes Ireland as a competitive tourism destination, offering business supports, marketing services, and managing tourist information centers nationwide

Government Administration 🇮🇪 Dublin 625 2003
18
National Treasury Management Agencyntma.ie

The company provides asset and liability management services to the Government, including borrowing, debt management, and support services for various entities

Financial Services 🇮🇪 Dublin 623 1990
19
Pobalpobal.ie

A nonprofit organization in Ireland supports communities and local agencies in achieving social inclusion and development through managing various government programs

Non-profit Organizations 🇮🇪 Dublin 524 1992
20
Connolly Hospital Blanchardstownhse.ie

This hospital in Blanchardstown provides healthcare services, medical treatments, and facilities to local residents and patients in need

Hospitals and Health Care 🇮🇪 Dublin 497 1955
21
National Transport Authoritynationaltransport.ie

Supervision and regulation of public passenger transport services, multi-modal ticketing, strategic planning, and sustainable transport project funding across Ireland.

Government Administration 🇮🇪 Dublin 490 2009
22
Dublin Airportlinktr.ee

A major international airport located in Dublin, Ireland, serving as the primary entry point for millions of passengers annually Part of the daa Group

Airlines and Aviation 🇮🇪 Dublin 484 n/a
23
Dún Laoghaire Institute of Art, Design and Technologyiadt.ie

Leader in higher education specializing in developing future innovators in digital world through various programs Discover opportunities for your future today

Higher Education 🇮🇪 Dublin 482 1997
24
ESB Internationalesbinternational.ie

A global engineering consultancy firm serving the utility sector, specializing in delivering large-scale projects to maximize investor returns and minimize project risk

Utilities 🇮🇪 Dublin 413 1975
25
National College of Art & Designncad.ie

Leading provider of art and design education in Ireland for over 250 years, offering undergraduate, graduate, and part-time programs across various disciplines

Design Services 🇮🇪 Dublin 412 1746
26
​Temple Street Children’s University Hospitalcuh.ie

A national pediatric hospital specializing in various medical fields, caring for 145,000 children annually with a team of over 1,000 healthcare professionals

Hospitals and Health Care 🇮🇪 Dublin 411 1872
27
Tourism Irelandtourismireland.com

Marketing the island of Ireland as a top holiday and Business Events destination globally, with offices in key international markets and on the island

Travel Arrangements 🇮🇪 Dublin 410 2002
28
Health Products Regulatory Authority (HPRA)hpra.ie

Regulating medicines and devices for people and animals, the company offers information on current vacancies for those interested in working with them

Government Administration 🇮🇪 Dublin 400 1996
29
Irish Aviation Authorityiaa.ie

Leading civil aviation regulator in Ireland ensuring safety, security, and consumer interests in compliance with global, European, and national regulations

Airlines and Aviation 🇮🇪 Dublin 393 1993
30
Dublin Fire Brigadedublincity.ie

Providing 24/7 Fire, Ambulance & Rescue services in Dublin with Firefighters, Paramedics, and Advanced Paramedics available to respond to emergencies

Public Safety 🇮🇪 Dublin 358 1862

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How this list is built

Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Nov 11, 2026.

More company lists in Dublin

The same list elsewhere in Ireland