Ireland's Top 2% Scientists 2026: Career-Long List

Ireland has 963 scientists on the 2026 career-long Top 2% list, up 9.3% from 881 in 2025. That places Ireland 33rd in the world by number of listed scientists. University College Dublin has the most listed scientists (170), followed by Trinity College Dublin (143).

Single Year

995

+70 (+7.6%) vs 2025

Career Data

963

+82 (+9.3%) vs 2025

World rank by count

#33

No change vs 2025

Institutes

110

+2 (+1.9%) vs 2025

Scientists in Ireland on the list, by year

The career-long count has grown 76% 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%

2026+9.3%

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%
2026	995	+7.6%	963	+9.3%

Top 10 institutes in Ireland

By number of listed scientists

Career-long list2026

Show the list

All 963 scientists

Career-long list2026

Showing the 2026 career-long list. Looking for single-year rankings? See the single-year list

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	339	OL O’Neill, Luke A.	Trinity College Dublin	Immunology	Rank 21
2	467	SP Serruys, Patrick W.	University of Galway	Cardiovascular System & Hematology	Rank 23
3	635	CJ Coey, JMD Michael David	Trinity College Dublin	Applied Physics	Rank 26
4	993	SD Sun, Da-Wen	University College Dublin	Food Science	Rank 3
5	1,282	CJ Coleman, Jonathan N.	Trinity College Dublin	Nanoscience & Nanotechnology	Rank 39
6	1,350	GD G. Dinan, Timothy G.	APC Microbiome Ireland	Psychiatry	Rank 47
7	1,909	SF Shanahan, Fergus L.	APC Microbiome Ireland	Gastroenterology & Hepatology	Rank 31
8	2,616	BG Biesta, Gert J.J.	Maynooth University	Education	Rank 9
9	2,688	DM Duffy, Michael Joseph	St Vincent's University Hospital	Oncology & Carcinogenesis	Rank 108
10	2,706	ZM Zaworotko, Michael J.	University of Limerick	Organic Chemistry	Rank 71
11	3,129	CJ Cryan, John F.	University College Cork	Neurology & Neurosurgery	Rank 272
12	3,266	BJ Butler, Judith E.	Munster Technological University (MTU)	Literary Studies	Rank 1
13	3,407	KR Kitchin, Rob	Maynooth University	Geography	Rank 10
14	3,505	HC Hill, Colin	University College Cork	Microbiology	Rank 71
15	5,192	MK Mills, Kingston H.G.	Trinity College Dublin	Immunology	Rank 195
16	5,197	OF O’Brien, Fergal J.	Royal College of Surgeons in Ireland	Biomedical Engineering	Rank 20
17	5,428	HD Higgins, Desmond G.	University College Dublin	Bioinformatics	Rank 20
18	5,489	WK Wolfe, Kenneth H.	UCD School of Medicine	Developmental Biology	Rank 261
19	5,956	MS Martin, Seamus J.	Trinity College Dublin	Biochemistry & Molecular Biology	Rank 250
20	6,398	TB Tiwari, Brijesh Kumar	Teagasc - Irish Agriculture and Food Development Authority	Food Science	Rank 21
21	6,501	KW Kölch, Walter	UCD School of Medicine	Biochemistry & Molecular Biology	Rank 271
22	6,703	OE O'brien, Eoin T.	University College Dublin	Cardiovascular System & Hematology	Rank 317
23	6,880	LB Leonard., Brian E.	University of Galway	Psychiatry	Rank 202
24	7,499	GE Gregg, Edward W.	Royal College of Surgeons in Ireland	Endocrinology & Metabolism	Rank 208
25	7,760	OP O'Brien, Peter James	University College Dublin	Biochemistry & Molecular Biology	Rank 334
26	8,283	FP Fox, Patrick F.	University College Cork	Dairy & Animal Science	Rank 6
27	9,314	SS Sanvito, Stefano	Trinity College Dublin	Applied Physics	Rank 228
28	9,336	CH Curran, Henry J.	University of Galway	Energy	Rank 109
29	9,782	LM Lynch, Marina A.	Trinity College Dublin	Neurology & Neurosurgery	Rank 786
30	9,855	BD Burn, David J.	University of Galway	Neurology & Neurosurgery	Rank 788
31	10,014	RI Robertson, Ian H.	Trinity College Dublin	Experimental Psychology	Rank 166
32	10,412	CP Cotter, Paul D.	University College Cork	Microbiology	Rank 252
33	11,095	TD Taylor, David	Trinity College Dublin	Mechanical Engineering & Transports	Rank 76
34	11,717	LJ Luong, John H.T.	University College Cork	Analytical Chemistry	Rank 59
35	11,824	RY Roos, Yrjo Henrik	University College Cork	Food Science	Rank 54
36	12,166	MW McNicholas, Walter T.	University College Dublin	Respiratory System	Rank 123
37	12,491	BL Briand, Lionel C.	University of Limerick	Software Engineering	Rank 8
38	12,836	CJ Colinge, Jean Pierre	Tyndall National Institute	Applied Physics	Rank 302
39	12,981	RP Ross, Paul R.	APC Microbiome Ireland	Microbiology	Rank 313
40	14,338	WW Wijns, William C.	University of Galway	Cardiovascular System & Hematology	Rank 642
41	14,901	CK Cashman, Kevin D.	University College Cork	Nutrition & Dietetics	Rank 114
42	15,475	OD O'Regan, Donal	University of Galway	General Mathematics	Rank 39
43	15,870	KR Kenny, Rose Anne	St James's Hospital	Geriatrics	Rank 25
44	16,260	WJ Walter, Jens W.	University College Cork	Microbiology	Rank 398
45	17,584	CS Connon, S. J.	Trinity College Dublin	Organic Chemistry	Rank 363
46	17,929	BC Burgess, Clifford P.	Institiúid Ard-Lénn Bhaile Átha Cliath	Nuclear & Particle Physics	Rank 241
47	18,057	CT Cotter, Thomas G.	St Patrick’s Pontifical University	Biochemistry & Molecular Biology	Rank 761
48	18,427	GS Ghosh, Subrata	APC Microbiome Ireland	Gastroenterology & Hepatology	Rank 295
49	18,471	DK Dawson, Kenneth A.	University College Dublin	Nanoscience & Nanotechnology	Rank 293
50	18,602	KB Kholodenko, Boris N.	UCD School of Medicine	Biochemistry & Molecular Biology	Rank 784
51	18,640	GT Gunnlaugsson, Thorfinnur	Trinity College Dublin	Organic Chemistry	Rank 379
52	18,881	LP Lonergan, Patrick	University College Dublin	Dairy & Animal Science	Rank 21
53	19,027	GI Graham, Ian Maklim	Trinity College Dublin	Cardiovascular System & Hematology	Rank 824
54	19,128	MP McSweeney, Paul L.H.	University College Cork	Dairy & Animal Science	Rank 22
55	19,410	HO Hardiman, Orla M.	Trinity College Dublin	Neurology & Neurosurgery	Rank 1,461
56	19,760	TD Tobin, Desmond J.	UCD School of Medicine	Dermatology & Venereal Diseases	Rank 97
57	19,791	TC Taylor, Cormac T.	UCD School of Medicine	Biochemistry & Molecular Biology	Rank 836
58	19,894	PP Puri, Prem	University College Dublin	Pediatrics	Rank 76
59	20,120	MF Milano, Federico	University College Dublin	Energy	Rank 241
60	20,730	OP O’Toole, Paul W. William	APC Microbiome Ireland	Microbiology	Rank 514
61	20,736	WD Wood, David Alexander	University of Galway	Cardiovascular System & Hematology	Rank 874
62	21,215	WJ Waddington, John L.	Royal College of Surgeons in Ireland	Psychiatry	Rank 530
63	21,485	WM Wilm, Matthias S.	University College Dublin	Developmental Biology	Rank 820
64	22,242	CM Caffrey, Martin	School of Medicine, Trinity College Dublin	Biophysics	Rank 35
65	22,342	PE Panadero, Ernesto	Dublin City University	Education	Rank 106
66	22,847	CI Coyne, Imelda T.	Trinity College Dublin	Nursing	Rank 23
67	22,857	SE Souto, Eliana B.	University College Dublin	Pharmacology & Pharmacy	Rank 167
68	23,163	SJ Scott, John Martin	School of Medicine, Trinity College Dublin	Nutrition & Dietetics	Rank 185
69	23,411	BB Bresnihan, Barry	Our Lady's Hospice Ltd, Dublin	Arthritis & Rheumatology	Rank 180
70	23,452	DC Dorman, Charles J.	Trinity College Dublin	Microbiology	Rank 587
71	23,549	FR FitzGerald, Richard J.	University of Limerick	Food Science	Rank 104
72	24,230	BJ Boland, John J.	Trinity College Dublin	Nanoscience & Nanotechnology	Rank 361
73	24,321	ME Morris, Edwin R.	University College Cork	Polymers	Rank 197
74	25,141	LP Lane, Philip R.	Banc Ceannais na hÉireann	Economics	Rank 235
75	26,242	VD Vercelli, Donata	University of Arizona College of Medicine	Immunology	Rank 844
76	27,401	FP Fallon, Padraic G.	Trinity College Dublin	Immunology	Rank 873
77	27,752	IA Irvine, Alan D.	Trinity College Dublin	Dermatology & Venereal Diseases	Rank 141
78	27,913	KJ Kerry, Joseph Patrick	University College Cork	Food Science	Rank 128
79	28,208	FB Fitzgerald, Brian F.	University of Limerick	Information Systems	Rank 65
80	28,679	SA Senagore, Anthony J.	Signum Surgical	Surgery	Rank 204
81	28,718	CJ Crown, John P.A.	St Vincent's University Hospital	Oncology & Carcinogenesis	Rank 1,251
82	29,715	CB Caulfield, Brian Michael	University College Dublin	Biomedical Engineering	Rank 124
83	29,805	PJ Prehn, Jochen H.	Royal College of Surgeons in Ireland	Neurology & Neurosurgery	Rank 2,148
84	30,735	NM Nolan, Michael	Tyndall National Institute	Chemical Physics	Rank 640
85	31,187	CR Conroy, Ronán M.	Royal College of Surgeons in Ireland	General & Internal Medicine	Rank 449
86	31,323	BA Bowie, Andrew G.	Trinity College Dublin	Immunology	Rank 965
87	31,969	CK Conlon, Kevin Christopher P.	Trinity College Dublin	Surgery	Rank 232
88	32,035	SB Smyth, Barry	University College Dublin	Artificial Intelligence & Image Processing	Rank 750
89	32,060	GM Gibney, Michael J.	University College Dublin	Nutrition & Dietetics	Rank 239
90	32,236	VJ Vink, Jorick S.	Armagh Observatory and Planetarium	Astronomy & Astrophysics	Rank 351
91	32,339	PI Perry, Ivan J.	University College Cork	General & Internal Medicine	Rank 460
92	32,862	BF Barry, Frank P.	University of Galway	Biomedical Engineering	Rank 136
93	33,088	WR Whatmore, Roger William	University College Cork	Applied Physics	Rank 773
94	33,198	WG Walsh, Gary	University of Limerick	Biotechnology	Rank 87
95	33,627	OD O'Mahony, Denis	Cork University Hospital	Geriatrics	Rank 57
96	33,995	OC O'Dowd, Colin D.	University of Galway	Meteorology & Atmospheric Sciences	Rank 512
97	34,075	DL Drury, Luke O'C	Institiúid Ard-Lénn Bhaile Átha Cliath	Astronomy & Astrophysics	Rank 386
98	34,917	SM Stöcker, Michael W.	University College Dublin	Physical Chemistry	Rank 121
99	34,939	CC Cunningham, Colm M.	Trinity College Dublin	Neurology & Neurosurgery	Rank 2,477
100	35,127	MN McElvaney, Noel G.	Royal College of Surgeons in Ireland	Respiratory System	Rank 330
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You are seeing the first 100. 863 more are on the 2026 career-long list.

Ranks 101 to 963The whole list, not only the top 100.

Every year since 2020Single Year and Career Data.

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Countries with a similar count

Career-long list2026

Singapore1,154 scientists

Russia1,133 scientists

Saudi Arabia1,071 scientists

South Africa963 scientists

Portugal787 scientists

Egypt676 scientists

Explore other countries

Career-long list2026

United Kingdom21,350 scientists

Sweden3,661 scientists

Denmark2,309 scientists

Finland1,612 scientists

Norway1,557 scientists

Estonia92 scientists

All countries on the world map

Frequently asked questions

How many scientists from Ireland are in the 2026 Stanford Top 2% list?

995 scientists affiliated with Ireland are on the 2026 single-year list, and 963 are on the career-long list.

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

On the 2026 career-long list, University College Dublin has the most listed scientists from Ireland, with 170. It is followed by Trinity College Dublin with 143.

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 963 in 2026, a change of +76.1%.

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.