Ireland's Top 2% Scientists 2025

Ireland has 925 scientists on the 2025 single-year Top 2% list, up 10.0% from 841 in 2024. That places Ireland 37th in the world by number of listed scientists. University College Dublin has the most listed scientists (172), followed by Trinity College Dublin (128).

Single Year

925

+84 (+10.0%) vs 2024

Career Data

881

+45 (+5.4%) vs 2024

World rank by count

#37

No change vs 2024

Institutes

+15 (+20.5%) vs 2024

Scientists in Ireland on the list, by year

The single-year count has grown 58% since 2020.

Single-year list, change on the previous year

2021+21.2%

2022+6.8%

2023+2.5%

2024+8.2%

2025+10.0%

Show the numbers

Year	Single Year	Change	Career Data	Change
2020	586		547
2021	710	+21.2%	661	+20.8%
2022	758	+6.8%	721	+9.1%
2023	777	+2.5%	769	+6.7%
2024	841	+8.2%	836	+8.7%
2025	925	+10.0%	881	+5.4%

Top 10 institutes in Ireland

By number of listed scientists

Single-year list2025

Show the list

All 925 scientists

Single-year list2025

The first 100 are free to browse.

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Rank in Ireland	World rank	Scientist	Institute	Sub-field	Rank in sub-field
1	406	OL O’Neill, Luke A.	Trinity College Dublin	Immunology	Rank 13
2	570	SD Sun, Da-Wen ‑w	University College Dublin	Food Science	Rank 7
3	603	BG Biesta, Gert J.J.	Maynooth University	Education	Rank 7
4	806	KR Kitchin, Rob M.	Maynooth University	Geography	Rank 4
5	1,004	GD G. Dinan, Timothy G.	APC Microbiome Ireland	Psychiatry	Rank 24
6	1,078	CJ Coey, JMD Michael David	Trinity College Dublin	Applied Physics	Rank 27
7	1,126	BJ Butler, Judith E.	Munster Technological University (MTU)	Literary Studies	Rank 1
8	1,165	CJ Coleman, Jonathan N.	Trinity College Dublin	Nanoscience & Nanotechnology	Rank 36
9	1,227	TB Tiwari, Brijesh Kumar	Teagasc - Irish Agriculture and Food Development Authority	Food Science	Rank 12
10	1,265	CJ Cryan, John F.	APC Microbiome Ireland	Neurology & Neurosurgery	Rank 76
11	1,417	HC Hill, Colin	University College Cork	Microbiology	Rank 22
12	1,595	PE Panadero, Ernesto	Dublin City University	Education	Rank 26
13	3,331	OF O'Brien, Fergal J.	Royal College of Surgeons in Ireland	Biomedical Engineering	Rank 11
14	3,484	MK Mills, Kingston H.G.	Trinity College Dublin	Immunology	Rank 73
15	3,981	DM Duffy, Michael Joseph	St Vincent's University Hospital	Oncology & Carcinogenesis	Rank 94
16	4,041	CP Cotter, Paul D.	University College Cork	Microbiology	Rank 58
17	4,086	WJ Walter, Jens W.	University College Cork	Microbiology	Rank 59
18	4,842	SF Shanahan, Fergus L.	APC Microbiome Ireland	Gastroenterology & Hepatology	Rank 65
19	5,545	BF Boukid, Fatma	Clonbio Group Ltd.	Food Science	Rank 37
20	5,611	CH Curran, Henry J.	University of Galway	Energy	Rank 153
21	5,660	MF Milano, Federico	University College Dublin	Energy	Rank 155
22	5,899	GE Gregg, Edward W.	Royal College of Surgeons in Ireland	Endocrinology & Metabolism	Rank 99
23	6,159	SP Serruys, Patrick W.	University of Galway	Cardiovascular System & Hematology	Rank 181
24	6,808	OP O’Toole, Paul W. William	APC Microbiome Ireland	Microbiology	Rank 105
25	6,969	CI Coyne, Imelda T.	Trinity College Dublin	Nursing	Rank 12
26	7,151	DM Daly, Michael J.	Maynooth University	Public Health	Rank 73
27	7,844	SE Souto, Eliana B.	University College Dublin	Pharmacology & Pharmacy	Rank 40
28	8,158	SS Sanvito, S.	Trinity College Dublin	Applied Physics	Rank 169
29	8,937	CG Clarke, Gerard	University College Cork	Neurology & Neurosurgery	Rank 454
30	9,640	BR Byrne, Robert A.	Mater Private Healthcare Dublin	Cardiovascular System & Hematology	Rank 289
31	9,816	GV Glaveanu, Vlad	Dublin City University	Social Psychology	Rank 222
32	9,871	BA Barhoum, Ahmed	Technological University Dublin	Nanoscience & Nanotechnology	Rank 336
33	11,284	TC Taylor, Cormac T.	UCD School of Medicine	Biochemistry & Molecular Biology	Rank 177
34	11,550	GD Granato, Daniel	University of Limerick	Food Science	Rank 102
35	11,572	LB Lucey, Brian M.	Trinity College Dublin	Finance	Rank 62
36	11,687	DJ Danaher, John	University of Galway	Applied Ethics	Rank 10
37	11,901	RP Ross, Paul R.	APC Microbiome Ireland	Microbiology	Rank 197
38	12,170	OD O'Mahony, Denis	Cork University Hospital	Geriatrics	Rank 25
39	13,001	WS Waters, Sineád M.	Teagasc - Irish Agriculture and Food Development Authority	Food Science	Rank 119
40	13,661	HO Hardiman, Orla M.	Trinity College Dublin	Neurology & Neurosurgery	Rank 668
41	13,836	PM Pagell, Mark D.	UCD Michael Smurfit Graduate Business School	Business & Management	Rank 414
42	13,932	MW McNicholas, Walter T.	University College Dublin	Respiratory System	Rank 75
43	14,265	ZM Zaworotko, Michael J.	University of Limerick	Organic Chemistry	Rank 182
44	14,272	JA Jaiswal, Amit K.	Technological University Dublin	Food Science	Rank 131
45	14,349	KJ Kerry, Joseph Patrick	University College Cork	Food Science	Rank 133
46	14,551	CK Cashman, Kevin D.	University College Cork	Nutrition & Dietetics	Rank 88
47	14,829	LM Lynch, Marina A.	Trinity College Dublin	Neurology & Neurosurgery	Rank 715
48	14,887	CB Caulfield, Brian Michael	University College Dublin	Biomedical Engineering	Rank 54
49	15,356	SC Stanton, Catherine S.	Teagasc - Irish Agriculture and Food Development Authority	Microbiology	Rank 269
50	15,418	OM O'Donnell, Martin J.	University of Galway	General & Internal Medicine	Rank 230
51	15,627	BA Birhane, Abeba	Trinity College Dublin	Artificial Intelligence & Image Processing	Rank 745
52	15,863	AE Arendt, Elke Karin	APC Microbiome Ireland	Food Science	Rank 150
53	15,972	NV Nicolosi, Valeria	Trinity College Dublin	Nanoscience & Nanotechnology	Rank 539
54	16,218	TD Taylor, David	Trinity College Dublin	Mechanical Engineering & Transports	Rank 154
55	16,244	RN Rowan, Neil J.	Technological University of the Shannon: Midlands Midwest (TUS)	Environmental Sciences	Rank 363
56	16,901	BK Browne, Kath A.	University College Dublin	Geography	Rank 81
57	17,040	TD Tobin, Desmond J.	UCD School of Medicine	Dermatology & Venereal Diseases	Rank 54
58	17,288	CA Carr, Alan	University College Dublin	Family Studies	Rank 5
59	17,448	LJ Luong, John H.T.	University College Cork	Analytical Chemistry	Rank 69
60	17,755	MI Martín-Loeches, Ignacio	School of Medicine, Trinity College Dublin	Emergency & Critical Care Medicine	Rank 60
61	17,809	DH Duncan, Henry (Hal)	Dublin Dental University Hospital	Dentistry	Rank 62
62	17,842	PQ Pham, Quoc Viet	Trinity College Dublin	Networking & Telecommunications	Rank 189
63	17,898	LB Leonard., Brian E.	University of Galway	Psychiatry	Rank 351
64	17,945	BD Berry, Donagh P.	Moorepark Animal & Grassland Research Centre	Dairy & Animal Science	Rank 26
65	18,499	WK Wolfe, Kenneth H.	UCD School of Medicine	Developmental Biology	Rank 460
66	18,878	PM Popović, Maja	DCU & IU	Artificial Intelligence & Image Processing	Rank 894
67	19,718	FD Flitcroft, Daniel Ian	Technological University Dublin	Ophthalmology & Optometry	Rank 65
68	20,029	FP Fox, Patrick F.	University College Cork	Dairy & Animal Science	Rank 30
69	20,193	FR FitzGerald, Richard J.	University of Limerick	Food Science	Rank 196
70	20,205	CC Cunningham, Colm M.	Trinity College Dublin	Neurology & Neurosurgery	Rank 943
71	20,282	GS Ghosh, Subrata	APC Microbiome Ireland	Gastroenterology & Hepatology	Rank 232
72	20,476	CJ Colinge, Jean Pierre	Tyndall National Institute	Applied Physics	Rank 401
73	20,573	NM Nolan, Michael	Tyndall National Institute	Chemical Physics	Rank 311
74	20,771	CK Conboy, Kieran	University of Galway	Information Systems	Rank 90
75	20,989	DM Dowling, Michael Mark	DCU Business School	Finance	Rank 104
76	21,015	CF Cugurullo, Federico	Trinity College Dublin	Urban & Regional Planning	Rank 62
77	21,440	MJ Martens, James	Google LLC, Europe	Artificial Intelligence & Image Processing	Rank 999
78	21,506	Liyanage, Madhusanka	University College Dublin	Networking & Telecommunications	Rank 227
79	21,580	BC Brunsdon, Chris F.	Maynooth University	Geological & Geomatics Engineering	Rank 241
80	21,787	BL Briand, Lionel C.	University of Limerick	Software Engineering	Rank 27
81	22,071	ZC Zhang, Chaosheng	University of Galway	Environmental Sciences	Rank 487
82	22,086	CS Corbet, Shaen	DCU Business School	Finance	Rank 108
83	22,314	LP Lane, Philip R.	Banc Ceannais na hÉireann	Economics	Rank 332
84	22,812	LP Lonergan, Patrick	University College Dublin	Dairy & Animal Science	Rank 32
85	22,831	CD Collings, David G.	Trinity Business School	Business & Management	Rank 637
86	22,851	ML McGuinness, Luke Aidan	Alexion Pharma International Operations Limited	General & Internal Medicine	Rank 329
87	23,393	CT Conley, Timothy G.	University College Dublin	Economics	Rank 343
88	23,512	MS More, Simon John	University College Dublin	Veterinary Sciences	Rank 11
89	23,636	FP Forde, Patrick M.	St James's Hospital	Oncology & Carcinogenesis	Rank 696
90	23,979	MP McSweeney, Paul L.H.	University College Cork	Dairy & Animal Science	Rank 36
91	24,003	KV Kannuchamy, Vasanth Kumar	University of Limerick	Chemical Engineering	Rank 159
92	24,217	BS Bhattacharjee, Sourav	University College Dublin	Pharmacology & Pharmacy	Rank 115
93	24,256	BB Becker, Brett A.	University College Dublin	Education	Rank 304
94	24,821	MS Martin, Seamus J.	Trinity College Dublin	Biochemistry & Molecular Biology	Rank 382
95	25,083	KW Kölch, Walter	UCD School of Medicine	Biochemistry & Molecular Biology	Rank 386
96	25,113	RJ Ringwood, John V.	Maynooth University	Industrial Engineering & Automation	Rank 265
97	25,512	HP Hyland, Philip E.	Maynooth University	Psychiatry	Rank 473
98	25,631	RI Robertson, Ian H.	Trinity College Dublin	Experimental Psychology	Rank 350
99	25,951	BC Burgess, Clifford P.	Institiúid Ard-Lénn Bhaile Átha Cliath	Nuclear & Particle Physics	Rank 331
100	26,019	LR Le Roux, Carel W.	University College Dublin	Endocrinology & Metabolism	Rank 403
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You are seeing the first 100. 825 more are on the 2025 single-year list.

Ranks 101 to 925The whole list, not only the top 100.

Every year since 2020Single Year and Career Data.

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Countries with a similar count

Single-year list2025

Russia962 scientists

New Zealand954 scientists

Pakistan946 scientists

Malaysia879 scientists

United Arab Emirates663 scientists

Czech Republic538 scientists

Explore other countries

Single-year list2025

United Kingdom18,125 scientists

Sweden2,666 scientists

Denmark2,061 scientists

Norway1,333 scientists

Finland1,208 scientists

Estonia108 scientists

All countries on the world map

Frequently asked questions

How many scientists from Ireland are in the 2025 Stanford Top 2% list?

925 scientists affiliated with Ireland are on the 2025 single-year list, and 881 are on the career-long list.

Which institute in Ireland has the most Top 2% scientists?

On the 2025 single-year list, University College Dublin has the most listed scientists from Ireland, with 172. It is followed by Trinity College Dublin with 128.

How has the number of Top 2% scientists in Ireland changed since 2020?

On the single-year list, Ireland went from 586 scientists in 2020 to 925 in 2025, a change of +57.8%.

What is the difference between the single-year and career-long lists?

The single-year list ranks scientists on the citations their work received in one year. The career-long list ranks them on citations across their whole career. Both lists are published every year, and a scientist can be on one, both or neither.

What is the official source of this data?

The rankings come from the science-wide author databases of standardized citation indicators published by Ioannidis et al. in the Elsevier Data Repository, updated every year. TOPSCINET, an independent platform, organises that data by country, year, institute and field, so you can compare and explore it.