Ireland's Top 2% Scientists 2021

Ireland has 710 scientists on the 2021 single-year Top 2% list, up 21.2% from 586 in 2020. That places Ireland 34th in the world by number of listed scientists, down 1 place. Trinity College Dublin has the most listed scientists (123), followed by University College Dublin (122).

Single Year

710

+124 (+21.2%) vs 2020

Career Data

661

+114 (+20.8%) vs 2020

World rank by count

#34

down 1 place vs 2020

Institutes

No change vs 2020

Scientists in Ireland on the list, by year

The single-year count has grown 21% 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 list2021

Show the list

1Trinity College Dublin123
2University College Dublin122
3National University of Ireland Galway72
4University College Cork62
5University of Limerick47
6Royal College of Surgeons in Ireland24
7Dublin City University23
8Moorepark Food Research Centre20
9Maynooth University19
10APC Microbiome Ireland16

All 710 scientists

Single-year list2021

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	291	OL O’Neill, Luke	Technological University Dublin	Immunology	Rank 11
2	402	CJ Coleman, Jonathan N.	Trinity College Dublin	Nanoscience & Nanotechnology	Rank 18
3	641	CJ Coey, J. M.D.	Trinity College Dublin	Applied Physics	Rank 23
4	947	CJ Cryan, John F.	APC Microbiome Ireland	Neurology & Neurosurgery	Rank 66
5	1,126	KR Kitchin, Rob	Maynooth University	Geography	Rank 5
6	1,241	OF O'Brien, Fergal J.	Royal College of Surgeons in Ireland	Biomedical Engineering	Rank 6
7	1,428	DT Dinan, T. G.	APC Microbiome Ireland	Psychiatry	Rank 36
8	2,441	TB Tiwari, Brijesh K.	Moorepark Food Research Centre	Food Science	Rank 14
9	2,874	HC Hill, Colin	APC Microbiome Ireland	Microbiology	Rank 58
10	3,182	SP Serruys, Patrick W.	National University of Ireland Galway	Cardiovascular System & Hematology	Rank 96
11	3,373	DM Duffy, Michael J.	University College Dublin, School of Medicine	Oncology & Carcinogenesis	Rank 111
12	3,643	CH Curran, Henry J.	National University of Ireland Galway	Energy	Rank 75
13	3,666	MA Meharg, Andrew A.	Queen's University Belfast	Environmental Sciences	Rank 38
14	4,480	CP Cotter, Paul D.	APC Microbiome Ireland	Microbiology	Rank 92
15	4,811	WJ Walter, Jens	APC Microbiome Ireland	Microbiology	Rank 99
16	5,107	SF Shanahan, F.	APC Microbiome Ireland	Gastroenterology & Hepatology	Rank 69
17	5,989	SS Sanvito, Stefano	Trinity College Dublin	Applied Physics	Rank 119
18	6,362	TV Torra, Vicenç	Maynooth University	Artificial Intelligence & Image Processing	Rank 180
19	6,662	TD Taylor, David	Trinity College Dublin	Mechanical Engineering & Transports	Rank 68
20	6,724	TJ Taylor, James W.	University of Oxford, Saïd Business School	Econometrics	Rank 18
21	7,334	VM van Mechelen, Willem	University College Dublin	Sport Sciences	Rank 29
22	9,277	MS Martin, Seamus J.	Trinity College Dublin	Biochemistry & Molecular Biology	Rank 208
23	9,377	MK Mills, Kingston H.G.	Trinity College Dublin	Immunology	Rank 249
24	9,515	CI Coyne, Imelda	Trinity College Dublin	Nursing	Rank 17
25	9,782	Singh, Sanjay Kumar	Maynooth University School of Business	Business & Management	Rank 235
26	10,188	OP O'Toole, Paul W.	APC Microbiome Ireland	Microbiology	Rank 226
27	10,262	CK Cashman, Kevin D.	University College Cork	Nutrition & Dietetics	Rank 73
28	10,281	AF Aharonian, Felix A.	Dublin Institute for Advanced Studies	Astronomy & Astrophysics	Rank 55
29	10,733	WK Wolfe, Kenneth H.	University College Dublin	Developmental Biology	Rank 385
30	11,385	CB Caulfield, Brian	University College Dublin	Biomedical Engineering	Rank 50
31	11,537	HD Higgins, Desmond G.	University College Dublin, School of Medicine	Bioinformatics	Rank 34
32	11,944	LP Lane, Philip R.	Trinity College Dublin	Economics	Rank 199
33	12,136	RI Robertson, I. H.	Trinity College Dublin	Experimental Psychology	Rank 199
34	12,184	LJ Luong, John H.T.	University College Cork	Analytical Chemistry	Rank 56
35	12,194	HO Hardiman, Orla	Trinity College Dublin	Neurology & Neurosurgery	Rank 738
36	12,216	RR Ross, R. Paul	APC Microbiome Ireland	Microbiology	Rank 266
37	12,354	LB Leonard, Brian E.	National University of Ireland Galway	Psychiatry	Rank 286
38	12,503	MF Milano, Federico	University College Dublin	Energy	Rank 255
39	12,592	LM Lynch, Marina A.	Trinity College Dublin	Neurology & Neurosurgery	Rank 759
40	12,945	RY Roos, Yrjö H.	University College Cork	Food Science	Rank 71
41	13,769	CC Cunningham, Colm	Trinity College Dublin	Neurology & Neurosurgery	Rank 822
42	13,954	RL Rezzolla, Luciano	Trinity College Dublin	Nuclear & Particle Physics	Rank 156
43	14,155	KW Kolch, Walter	University College Dublin	Biochemistry & Molecular Biology	Rank 348
44	14,280	TC Taylor, Cormac T.	University College Dublin	Biochemistry & Molecular Biology	Rank 352
45	15,156	OD O'Regan, Donal	National University of Ireland Galway	General Mathematics	Rank 53
46	15,196	KK Kumar, K. Vasanth	University of Limerick	Strategic, Defence & Security Studies	Rank 32
47	15,555	CG Clarke, Gerard	University College Cork	Neurology & Neurosurgery	Rank 915
48	15,683	FP Fox, Patrick	University College Cork	Dairy & Animal Science	Rank 22
49	16,003	TD Tobin, Desmond J.	University College Dublin	Dermatology & Venereal Diseases	Rank 47
50	16,126	MW McNicholas, Walter T.	St Vincent's University Hospital	Respiratory System	Rank 114
51	16,211	LP Lonergan, Pat	University College Dublin	Obstetrics & Reproductive Medicine	Rank 77
52	16,730	OM O’Donnell, Martin	National University of Ireland Galway	General & Internal Medicine	Rank 216
53	16,811	LP Lens, Piet N.L.	National University of Ireland Galway	Biotechnology	Rank 53
54	17,024	SA Soroudi, Alireza	University College Dublin	Energy	Rank 344
55	17,161	OE O’Brien, Eoin	University College Dublin	Cardiovascular System & Hematology	Rank 554
56	17,479	ZC Zhang, Chaosheng	National University of Ireland Galway	Environmental Sciences	Rank 206
57	17,772	BC Brunsdon, Chris	Maynooth University	Geological & Geomatics Engineering	Rank 145
58	17,967	FR FitzGerald, Richard J.	University of Limerick	Food Science	Rank 106
59	18,088	MP McSweeney, Paul L.H.	University College Cork	Dairy & Animal Science	Rank 29
60	18,590	OL O'Driscoll, Lorraine	Trinity College Dublin	Oncology & Carcinogenesis	Rank 683
61	18,716	AE Arendt, Elke K.	University College Cork	Food Science	Rank 115
62	19,010	SC Stanton, Catherine	Moorepark Food Research Centre	Microbiology	Rank 433
63	19,529	DK Dawson, Kenneth A.	University College Dublin	Nanoscience & Nanotechnology	Rank 477
64	20,082	NM Nolan, Michael	Tyndall National Institute	Chemical Physics	Rank 366
65	20,703	NV Nicolosi, Valeria	Trinity College Dublin	Nanoscience & Nanotechnology	Rank 504
66	20,975	JR Johnson, Rory	University College Dublin	Developmental Biology	Rank 695
67	21,533	DG Dickens, Gerald R.	Trinity College Dublin	Geochemistry & Geophysics	Rank 390
68	22,297	WG Walsh, Gary	University of Limerick	Biotechnology	Rank 68
69	22,327	LB Lucey, Brian	Trinity Business School	Finance	Rank 87
70	22,845	KB Kholodenko, Boris N.	University College Dublin	Biochemistry & Molecular Biology	Rank 535
71	23,453	BD Berry, Donagh P.	Moorepark Animal & Grassland Research Centre	Dairy & Animal Science	Rank 40
72	23,733	OC O'Dowd, Colin	National University of Ireland Galway	Meteorology & Atmospheric Sciences	Rank 448
73	23,991	FP Fallon, Padraic G.	Trinity College Dublin	Immunology	Rank 606
74	24,473	WG Walker, Gavin M.	University of Limerick	Chemical Engineering	Rank 146
75	24,670	CR Conroy, Ronán M.	Royal College of Surgeons in Ireland	General & Internal Medicine	Rank 302
76	25,198	KJ Kerry, Joe P.	University College Cork	Food Science	Rank 154
77	25,462	BL Brennan, Lorraine	University College Dublin	Nutrition & Dietetics	Rank 182
78	25,681	KR Kenny, R. A.	Trinity College Dublin	Geriatrics	Rank 53
79	25,733	FM Ferguson, Mark W.J.	Science Foundation Ireland	Developmental Biology	Rank 825
80	25,756	BA Bowie, Andrew	Trinity College Dublin	Immunology	Rank 653
81	25,954	BK Browne, Kath	University College Dublin	Geography	Rank 123
82	26,166	MS More, Simon J.	University College Dublin	Veterinary Sciences	Rank 20
83	26,305	GT Gunnlaugsson, Thorfinnur	Trinity College Dublin	Organic Chemistry	Rank 382
84	26,460	HD Henshall, David C.	Royal College of Surgeons in Ireland	Neurology & Neurosurgery	Rank 1,514
85	26,688	GI Greer, Ian	Queen's University Belfast	Obstetrics & Reproductive Medicine	Rank 147
86	27,079	WR Whelan, R.	Trinity College Dublin	Neurology & Neurosurgery	Rank 1,543
87	27,775	ME Morris, Edwin R.	University College Cork	Polymers	Rank 247
88	28,008	BR Byrne, Robert A.	Royal College of Surgeons in Ireland	Cardiovascular System & Hematology	Rank 853
89	28,109	MB McCleary, Barry V.	Megazyme Ltd.	Food Science	Rank 185
90	28,265	BS Bhattacharjee, Sourav	University College Dublin	Toxicology	Rank 114
91	28,608	GD Granato, Daniel	University of Limerick	Food Science	Rank 188
92	28,817	MF McDermott, Frank	University College Dublin	Geochemistry & Geophysics	Rank 531
93	29,123	BF Barry, Frank	National University of Ireland Galway	Biomedical Engineering	Rank 140
94	29,422	KG Killeen, Gerry F.	University College Cork	Tropical Medicine	Rank 38
95	30,611	SC Sullivan, Caroline A.	Hen Harrier Project	Environmental Engineering	Rank 171
96	30,962	CD Collings, David G.	DCU Business School	Business & Management	Rank 661
97	31,161	JA Jones, A. G.	Dublin Institute for Advanced Studies	Geochemistry & Geophysics	Rank 580
98	31,553	GT Garavan, Thomas N.	National College of Ireland	Business & Management	Rank 674
99	31,997	CM Collins, Maurice N.	University of Limerick	Polymers	Rank 280
100	32,274	FB Fitzgerald, Brian	University of Limerick	Information Systems	Rank 99
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You are seeing the first 100. 610 more are on the 2021 single-year list.

Ranks 101 to 710The 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 list2021

Saudi Arabia870 scientistsin 2021

Greece846 scientistsin 2021

South Africa752 scientistsin 2021

Portugal703 scientistsin 2021

Egypt605 scientistsin 2021

Malaysia549 scientistsin 2021

Explore other countries

Single-year list2021

United Kingdom15,844 scientistsin 2021

Sweden2,438 scientistsin 2021

Denmark1,795 scientistsin 2021

Norway1,100 scientistsin 2021

Finland1,016 scientistsin 2021

Estonia63 scientistsin 2021

All countries on the world map

Frequently asked questions

How many scientists from Ireland are in the 2021 Stanford Top 2% list?

710 scientists affiliated with Ireland are on the 2021 single-year list, and 661 are on the career-long list.

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

On the 2021 single-year list, Trinity College Dublin has the most listed scientists from Ireland, with 123. It is followed by University College Dublin with 122.

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 710 in 2021, a change of +21.2%.

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.