Ireland's Top 2% Scientists 2025: Career-Long List

Ireland has 881 scientists on the 2025 career-long Top 2% list, up 5.4% from 836 in 2024. That places Ireland 33rd in the world by number of listed scientists, down 1 place. University College Dublin has the most listed scientists (151), followed by Trinity College Dublin (130).

Single Year

925

+84 (+10.0%) vs 2024

Career Data

881

+45 (+5.4%) vs 2024

World rank by count

#33

down 1 place vs 2024

Institutes

108

+17 (+18.7%) vs 2024

Scientists in Ireland on the list, by year

The career-long count has grown 61% since 2020.

Career-long list, change on the previous year

2021+20.8%

2022+9.1%

2023+6.7%

2024+8.7%

2025+5.4%

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

Career-long list2025

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All 881 scientists

Career-long 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	345	OL O’Neill, Luke A.	Trinity College Dublin	Immunology	Rank 23
2	437	SP Serruys, Patrick W.	University of Galway	Cardiovascular System & Hematology	Rank 22
3	632	CJ Coey, JMD Michael David	Trinity College Dublin	Applied Physics	Rank 26
4	1,235	CJ Coleman, Jonathan N.	Trinity College Dublin	Nanoscience & Nanotechnology	Rank 37
5	1,241	SD Sun, Da-Wen ‑w	University College Dublin	Food Science	Rank 4
6	1,397	GD G. Dinan, Timothy G.	APC Microbiome Ireland	Psychiatry	Rank 48
7	1,811	SF Shanahan, Fergus L.	APC Microbiome Ireland	Gastroenterology & Hepatology	Rank 26
8	2,513	ZM Zaworotko, Michael J.	University of Limerick	Organic Chemistry	Rank 69
9	2,654	DM Duffy, Michael Joseph	St Vincent's University Hospital	Oncology & Carcinogenesis	Rank 112
10	3,298	BG Biesta, Gert J.J.	Maynooth University	Education	Rank 11
11	3,612	BJ Butler, Judith E.	Munster Technological University (MTU)	Literary Studies	Rank 1
12	3,667	CJ Cryan, John F.	APC Microbiome Ireland	Neurology & Neurosurgery	Rank 318
13	3,899	KR Kitchin, Rob M.	Maynooth University	Geography	Rank 9
14	3,916	HC Hill, Colin	University College Cork	Microbiology	Rank 85
15	5,051	WK Wolfe, Kenneth H.	UCD School of Medicine	Developmental Biology	Rank 251
16	5,076	HD Higgins, Desmond G.	University College Dublin	Bioinformatics	Rank 20
17	5,487	MS Martin, Seamus J.	Trinity College Dublin	Biochemistry & Molecular Biology	Rank 240
18	5,606	OF O'Brien, Fergal J.	Royal College of Surgeons in Ireland	Biomedical Engineering	Rank 22
19	5,641	MK Mills, Kingston H.G.	Trinity College Dublin	Immunology	Rank 218
20	6,066	KW Kölch, Walter	UCD School of Medicine	Biochemistry & Molecular Biology	Rank 263
21	6,132	OE O'brien, Eoin T.	University College Dublin	Cardiovascular System & Hematology	Rank 290
22	6,608	LB Leonard., Brian E.	University of Galway	Psychiatry	Rank 194
23	7,260	OP O'Brien, Peter James	University College Dublin	Biochemistry & Molecular Biology	Rank 323
24	7,938	GE Gregg, Edward W.	Royal College of Surgeons in Ireland	Endocrinology & Metabolism	Rank 223
25	8,232	FP Fox, Patrick F.	University College Cork	Dairy & Animal Science	Rank 7
26	8,307	TB Tiwari, Brijesh Kumar	Teagasc - Irish Agriculture and Food Development Authority	Food Science	Rank 31
27	9,500	SS Sanvito, S.	Trinity College Dublin	Applied Physics	Rank 235
28	9,647	LM Lynch, Marina A.	Trinity College Dublin	Neurology & Neurosurgery	Rank 791
29	9,650	RI Robertson, Ian H.	Trinity College Dublin	Experimental Psychology	Rank 159
30	9,947	CH Curran, Henry J.	University of Galway	Energy	Rank 108
31	11,043	TD Taylor, David	Trinity College Dublin	Mechanical Engineering & Transports	Rank 76
32	11,074	CP Cotter, Paul D.	University College Cork	Microbiology	Rank 266
33	11,498	LJ Luong, John H.T.	University College Cork	Analytical Chemistry	Rank 59
34	12,208	RY Roos, Yrjô Henrik	University College Cork	Food Science	Rank 48
35	12,446	BL Briand, Lionel C.	University of Limerick	Software Engineering	Rank 7
36	12,459	CJ Colinge, Jean Pierre	Tyndall National Institute	Applied Physics	Rank 302
37	12,620	MW McNicholas, Walter T.	University College Dublin	Respiratory System	Rank 126
38	13,457	RP Ross, Paul R.	APC Microbiome Ireland	Microbiology	Rank 324
39	14,101	WW Wijns, William C.	University of Galway	Cardiovascular System & Hematology	Rank 637
40	15,269	CK Cashman, Kevin D.	University College Cork	Nutrition & Dietetics	Rank 113
41	15,634	OD O'Regan, Donal	University of Galway	General Mathematics	Rank 41
42	16,422	CS Connon, S. J.	Trinity College Dublin	Organic Chemistry	Rank 348
43	16,814	CT Cotter, Thomas G.	St Patrick's College, Maynooth	Biochemistry & Molecular Biology	Rank 752
44	16,857	KR Kenny, Rose Anne	Trinity College Dublin	Geriatrics	Rank 27
45	17,292	KB Kholodenko, Boris N.	UCD School of Medicine	Biochemistry & Molecular Biology	Rank 767
46	17,725	GT Gunnlaugsson, Thorfinnur	Trinity College Dublin	Organic Chemistry	Rank 374
47	17,842	BC Burgess, Clifford P.	Institiúid Ard-Lénn Bhaile Átha Cliath	Nuclear & Particle Physics	Rank 240
48	17,890	DK Dawson, Kenneth A.	University College Dublin	Nanoscience & Nanotechnology	Rank 268
49	18,525	GI Graham, Ian Maklim	Trinity College Dublin	Cardiovascular System & Hematology	Rank 809
50	18,893	GS Ghosh, Subrata	APC Microbiome Ireland	Gastroenterology & Hepatology	Rank 305
51	18,925	WJ Walter, Jens W.	University College Cork	Microbiology	Rank 470
52	18,960	LP Lonergan, Patrick	University College Dublin	Dairy & Animal Science	Rank 21
53	19,191	PP Puri, Prem	University College Dublin	Pediatrics	Rank 78
54	19,408	WD Wood, David Alexander	University of Galway	Cardiovascular System & Hematology	Rank 833
55	19,771	MP McSweeney, Paul L.H.	University College Cork	Dairy & Animal Science	Rank 23
56	19,788	HO Hardiman, Orla M.	Trinity College Dublin	Neurology & Neurosurgery	Rank 1,524
57	20,206	WM Wilm, Matthias S.	University College Dublin	Developmental Biology	Rank 789
58	20,263	WJ Waddington, John L.	Royal College of Surgeons in Ireland	Psychiatry	Rank 520
59	20,582	TD Tobin, Desmond J.	UCD School of Medicine	Dermatology & Venereal Diseases	Rank 99
60	20,693	SM Senge, Mathias O.	Trinity College Dublin	Organic Chemistry	Rank 421
61	20,866	TC Taylor, Cormac T.	UCD School of Medicine	Biochemistry & Molecular Biology	Rank 908
62	20,947	CM Caffrey, Martin	Trinity College Dublin	Biophysics	Rank 34
63	21,304	SJ Scott, John Martin	School of Medicine, Trinity College Dublin	Nutrition & Dietetics	Rank 169
64	21,888	BB Bresnihan, Barry	Our Lady's Hospice Ltd, Dublin	Arthritis & Rheumatology	Rank 175
65	22,345	DC Dorman, Charles J.	Trinity College Dublin	Microbiology	Rank 559
66	22,495	OP O’Toole, Paul W. William	APC Microbiome Ireland	Microbiology	Rank 565
67	22,815	MF Milano, Federico	University College Dublin	Energy	Rank 264
68	23,070	BJ Boland, John J.	Trinity College Dublin	Nanoscience & Nanotechnology	Rank 325
69	23,939	ME Morris, Edwin R.	University College Cork	Polymers	Rank 198
70	24,396	FR FitzGerald, Richard J.	University of Limerick	Food Science	Rank 105
71	24,554	CI Coyne, Imelda T.	Trinity College Dublin	Nursing	Rank 25
72	25,221	LP Lane, Philip R.	Banc Ceannais na hÉireann	Economics	Rank 230
73	26,730	FP Fallon, Padraic G.	Trinity College Dublin	Immunology	Rank 873
74	28,015	SE Souto, Eliana B.	University College Dublin	Pharmacology & Pharmacy	Rank 221
75	28,106	FB Fitzgerald, Brian	University of Limerick	Software Engineering	Rank 45
76	28,279	SA Senagore, Anthony J.	Signum Surgical Limited New Docks	Surgery	Rank 206
77	29,006	CJ Crown, John P.A.	St Vincent's University Hospital	Oncology & Carcinogenesis	Rank 1,284
78	29,465	KJ Kerry, Joseph Patrick	University College Cork	Food Science	Rank 127
79	29,687	PJ Prehn, Jochen H.	Royal College of Surgeons in Ireland	Neurology & Neurosurgery	Rank 2,157
80	29,753	IA Irvine, Alan D.	Trinity College Dublin	Dermatology & Venereal Diseases	Rank 159
81	29,887	BA Bowie, Andrew G.	Trinity College Dublin	Immunology	Rank 957
82	30,277	CR Conroy, Ronán M.	Royal College of Surgeons in Ireland	General & Internal Medicine	Rank 427
83	30,675	CK Conlon, Kevin Christopher P.	Trinity College Dublin	Surgery	Rank 235
84	31,048	NM Nolan, Michael	Tyndall National Institute	Chemical Physics	Rank 659
85	31,091	PI Perry, Ivan J.	University College Cork	General & Internal Medicine	Rank 435
86	31,183	SB Smyth, Barry	University College Dublin	Artificial Intelligence & Image Processing	Rank 692
87	31,299	BF Barry, Frank P.	University of Galway	Biomedical Engineering	Rank 128
88	32,283	PE Panadero, Ernesto	Dublin City University	Education	Rank 146
89	32,615	SM Stöcker, Michael W.	University College Dublin	Physical Chemistry	Rank 115
90	32,738	CB Caulfield, Brian Michael	University College Dublin	Biomedical Engineering	Rank 137
91	33,217	WG Walsh, Gary	University of Limerick	Biotechnology	Rank 89
92	33,288	DL Drury, Luke O'C	Institiúid Ard-Lénn Bhaile Átha Cliath	Astronomy & Astrophysics	Rank 362
93	33,329	OC O'Dowd, Colin D.	University of Galway	Meteorology & Atmospheric Sciences	Rank 487
94	34,248	GM Gibney, Michael J.	University College Dublin	Nutrition & Dietetics	Rank 250
95	34,336	MN McElvaney, Noel G.	Royal College of Surgeons in Ireland	Respiratory System	Rank 329
96	34,811	CC Cunningham, Colm M.	Trinity College Dublin	Neurology & Neurosurgery	Rank 2,509
97	34,814	HJ Hourihane, Jonathan O.Brien	Royal College of Surgeons in Ireland	Allergy	Rank 113
98	35,151	OD O'Mahony, Denis	Cork University Hospital	Geriatrics	Rank 57
99	35,329	AR Anwyl, Roger	Trinity College Dublin	Neurology & Neurosurgery	Rank 2,535
100	35,985	WG Watson, Graeme W.	Trinity College Dublin	Chemical Physics	Rank 761
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You are seeing the first 100. 781 more are on the 2025 career-long list.

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Every year since 2020Single Year and Career Data.

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Countries with a similar count

Career-long list2025

Singapore1,090 scientists

Russia1,069 scientists

South Africa896 scientists

Saudi Arabia850 scientists

Portugal711 scientists

Czech Republic588 scientists

Explore other countries

Career-long list2025

United Kingdom20,571 scientists

Sweden3,471 scientists

Denmark2,207 scientists

Finland1,532 scientists

Norway1,493 scientists

Estonia85 scientists

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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 career-long list, University College Dublin has the most listed scientists from Ireland, with 151. It is followed by Trinity College Dublin with 130.

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

On the career-long list, Ireland went from 547 scientists in 2020 to 881 in 2025, a change of +61.1%.

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.