Ireland's Top 2% Scientists 2023

Ireland has 777 scientists on the 2023 single-year Top 2% list, up 2.5% from 758 in 2022. That places Ireland 36th in the world by number of listed scientists, down 1 place. University College Dublin has the most listed scientists (144), followed by Trinity College Dublin (128).

Single Year

777

+19 (+2.5%) vs 2022

Career Data

769

+48 (+6.7%) vs 2022

World rank by count

#36

down 1 place vs 2022

Institutes

-17 (-17.0%) vs 2022

Scientists in Ireland on the list, by year

The single-year count has grown 33% 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 list2023

Show the list

All 777 scientists

Single-year list2023

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	248	OL O'Neill, Luke A.J.	Trinity College Dublin	Immunology	Rank 11
2	700	CJ Cryan, John F.	University College Cork	Neurology & Neurosurgery	Rank 55
3	709	DT Dinan, Timothy G.	APC Microbiome Ireland	Psychiatry	Rank 17
4	763	CJ Coleman, Jonathan N.	Trinity College Dublin	Nanoscience & Nanotechnology	Rank 27
5	911	CJ Coey, J. M.D.	Trinity College Dublin	Applied Physics	Rank 26
6	1,035	KR Kitchin, Rob	Maynooth University	Geography	Rank 4
7	1,046	BG Biesta, Gert	Maynooth University	Education	Rank 9
8	1,487	TB Tiwari, Brijesh K.	Moorepark Food Research Centre	Food Science	Rank 12
9	1,506	HC Hill, Colin	APC Microbiome Ireland	Microbiology	Rank 25
10	2,164	OF O'Brien, Fergal J.	Trinity College Dublin	Biomedical Engineering	Rank 8
11	3,014	CP Cotter, Paul D.	Moorepark Food Research Centre	Microbiology	Rank 62
12	3,422	DM Duffy, Michael J.	St Vincent's University Hospital	Oncology & Carcinogenesis	Rank 110
13	3,582	SF Shanahan, Fergus	APC Microbiome Ireland	Gastroenterology & Hepatology	Rank 46
14	4,531	WJ Walter, Jens	APC Microbiome Ireland	Microbiology	Rank 88
15	4,949	SP Serruys, Patrick W.	University of Galway	Cardiovascular System & Hematology	Rank 164
16	6,064	OP O'Toole, Paul W.	APC Microbiome Ireland	Microbiology	Rank 118
17	6,695	SS Sanvito, Stefano	Trinity College Dublin	Applied Physics	Rank 130
18	6,714	CH Curran, Henry	University of Galway	Energy	Rank 139
19	7,785	AF Aharonian, Felix	Institiúid Ard-Lénn Bhaile Átha Cliath	Astronomy & Astrophysics	Rank 41
20	8,917	CI Coyne, Imelda	Trinity College Dublin	Nursing	Rank 15
21	9,536	MF Milano, Federico	University College Dublin	Energy	Rank 205
22	9,607	RR Ross, R. Paul	APC Microbiome Ireland	Microbiology	Rank 204
23	9,617	CK Cashman, Kevin D.	University College Cork	Nutrition & Dietetics	Rank 74
24	9,730	WM Weiser, Martin R.	St Vincent's University Hospital	Oncology & Carcinogenesis	Rank 340
25	9,984	CG Clarke, Gerard	University College Cork	Neurology & Neurosurgery	Rank 566
26	10,007	TD Taylor, David	Trinity College Dublin	Mechanical Engineering & Transports	Rank 94
27	10,021	TR Tremblay, Richard E.	University College Dublin	Developmental & Child Psychology	Rank 102
28	10,535	LB Leonard, Brian	University of Galway	Psychiatry	Rank 240
29	10,718	DM Daly, Michael	Maynooth University	Public Health	Rank 116
30	10,776	ZM Zaworotko, Michael J.	University of Limerick	Organic Chemistry	Rank 152
31	10,932	OD O'Mahony, Denis	Cork University Hospital	Geriatrics	Rank 24
32	11,268	CC Cunningham, Colm	Trinity College Dublin	Neurology & Neurosurgery	Rank 625
33	11,396	VM van Mechelen, Willem	University College Dublin	Sport Sciences	Rank 43
34	11,493	HO Hardiman, Orla	Trinity College Dublin	Neurology & Neurosurgery	Rank 640
35	11,877	MS Martin, Seamus J.	Trinity College Dublin	Biochemistry & Molecular Biology	Rank 250
36	11,960	GV Glaveanu, Vlad	Dublin City University	Social Psychology	Rank 244
37	12,001	WK Wolfe, Kenneth H.	University College Dublin	Developmental Biology	Rank 372
38	12,187	MK Mills, Kingston H.G.	Trinity College Dublin	Immunology	Rank 294
39	12,875	SC Stanton, Catherine	APC Microbiome Ireland	Microbiology	Rank 285
40	13,064	CD Collings, David G.	Trinity Business School	Business & Management	Rank 344
41	13,582	BC Brunsdon, Chris	Maynooth University	Geological & Geomatics Engineering	Rank 131
42	14,148	FR FitzGerald, Richard J.	University of Limerick	Food Science	Rank 100
43	14,213	EH Eysenck, H. J.	King's College London	Social Psychology	Rank 280
44	14,375	LP Lens, Piet	University of Galway	Biotechnology	Rank 51
45	14,945	EK Eckardt, Kai Uwe	University of Galway	Urology & Nephrology	Rank 90
46	15,136	RY Roos, Yrjö	University College Cork	Food Science	Rank 108
47	15,390	TC Taylor, Cormac T.	UCD School of Medicine	Biochemistry & Molecular Biology	Rank 327
48	15,559	OM O'Donnell, Martin	University of Galway	General & Internal Medicine	Rank 256
49	15,652	LR le Roux, Carel W.	University College Dublin	Endocrinology & Metabolism	Rank 298
50	16,010	PM Pagell, Mark	University College Dublin	Business & Management	Rank 407
51	16,423	RI Robertson, Ian	Trinity College Dublin	Experimental Psychology	Rank 249
52	16,589	HM Hayes, Maria	Moorepark Food Research Centre	Food Science	Rank 121
53	16,663	TD Tobin, Desmond J.	University College Dublin	Dermatology & Venereal Diseases	Rank 50
54	16,900	DG Dickens, G. R.	Trinity College Dublin	Geochemistry & Geophysics	Rank 266
55	17,052	AE Arendt, Elke	University College Cork	Food Science	Rank 127
56	17,113	LM Lynch, Marina A.	Trinity College Dublin	Neurology & Neurosurgery	Rank 920
57	17,166	NV Nicolosi, Valeria	Trinity College Dublin	Nanoscience & Nanotechnology	Rank 520
58	17,169	FP Fox, P. F.	University College Cork	Dairy & Animal Science	Rank 23
59	17,198	LJ Luong, John H.T.	University College Cork	Analytical Chemistry	Rank 71
60	17,256	BD Berry, Donagh P.	Moorepark Animal & Grassland Research Centre	Dairy & Animal Science	Rank 24
61	17,303	LB Lucey, Brian M.	Trinity Business School	Finance	Rank 74
62	18,057	MW McNicholas, Walter T.	St Vincent's University Hospital	Respiratory System	Rank 117
63	18,222	KJ Kerry, Joe P.	University College Cork	Food Science	Rank 140
64	18,259	SA Soroudi, Alireza	University College Dublin	Energy	Rank 402
65	18,557	GD Granato, Daniel	University of Limerick	Food Science	Rank 143
66	18,839	MS More, Simon J.	University College Dublin	Veterinary Sciences	Rank 11
67	19,876	SM Senge, Mathias O.	Trinity College Dublin	Organic Chemistry	Rank 250
68	19,925	HP Hyland, Philip	Maynooth University	Psychiatry	Rank 415
69	20,035	KR Kenny, Rose Anne	St James's Hospital	Geriatrics	Rank 40
70	20,635	KW Kolch, Walter	University College Dublin	Biochemistry & Molecular Biology	Rank 424
71	20,670	BK Browne, Kath	University College Dublin	Geography	Rank 105
72	21,681	ZC Zhang, Chaosheng	University of Galway	Environmental Sciences	Rank 340
73	21,906	KK Kumar, K. Vasanth	University of Limerick	Strategic, Defence & Security Studies	Rank 43
74	22,062	OL O’Driscoll, Lorraine	Trinity College Dublin	Oncology & Carcinogenesis	Rank 794
75	22,130	GM Gibney, Mike	University College Dublin	Nutrition & Dietetics	Rank 163
76	22,309	OP O'Brien, Peter J.	University College Dublin	Biochemistry & Molecular Biology	Rank 447
77	22,425	GS Ghosh, Subrata	APC Microbiome Ireland	Gastroenterology & Hepatology	Rank 256
78	22,426	DK Dawson, Kenneth A.	University College Dublin	Nanoscience & Nanotechnology	Rank 666
79	22,949	CA Carr, Alan	University College Dublin	Family Studies	Rank 6
80	23,032	CK Conboy, Kieran	University of Galway	Information Systems	Rank 85
81	23,278	IA Irvine, Alan D.	Trinity College Dublin	Dermatology & Venereal Diseases	Rank 77
82	23,572	BS Bhattacharjee, Sourav	University College Dublin	Toxicology	Rank 85
83	23,657	HD Higgins, Desmond G.	UCD School of Medicine	Bioinformatics	Rank 78
84	24,389	GI Graham, Ian	Trinity College Dublin	Cardiovascular System & Hematology	Rank 798
85	25,498	NM Nolan, Michael	Tyndall National Institute	Chemical Physics	Rank 384
86	25,807	MP McSweeney, Paul L.H.	University College Cork	Dairy & Animal Science	Rank 46
87	26,158	RL Rezzolla, Luciano	Trinity College Dublin	Astronomy & Astrophysics	Rank 238
88	26,346	OE O'Brien, Eoin	UCD School of Medicine	Cardiovascular System & Hematology	Rank 856
89	26,643	BL Brennan, Lorraine	University College Dublin	Nutrition & Dietetics	Rank 192
90	27,080	CR Conroy, Ronan	Royal College of Surgeons in Ireland	General & Internal Medicine	Rank 400
91	28,400	MI Martin-Loeches, Ignacio	St James's Hospital	Emergency & Critical Care Medicine	Rank 104
92	28,776	OD O’Regan, Donal	University of Galway	General Mathematics	Rank 106
93	29,043	VD Veale, Douglas J.	St Vincent's University Hospital	Arthritis & Rheumatology	Rank 184
94	29,060	RN Rowan, N. J.	Technological University of the Shannon: Midlands Midwest (TUS)	Environmental Sciences	Rank 463
95	29,066	BA Bowie, Andrew G.	Trinity College Dublin	Immunology	Rank 674
96	29,899	DJ Danaher, John	University of Galway	Applied Ethics	Rank 20
97	31,446	LJ Laffey, John G.	University of Galway	Anesthesiology	Rank 86
98	31,553	LP Lonergan, Pat	University College Dublin	Obstetrics & Reproductive Medicine	Rank 169
99	31,602	WW Wijns, William	University of Galway	Cardiovascular System & Hematology	Rank 1,009
100	31,960	PS Pillai, Suresh C.	Atlantic Technological University	Physical Chemistry	Rank 129
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You are seeing the first 100. 677 more are on the 2023 single-year list.

Ranks 101 to 777The 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 list2023

South Africa855 scientistsin 2023

Egypt814 scientistsin 2023

Portugal791 scientistsin 2023

Malaysia716 scientistsin 2023

Pakistan709 scientistsin 2023

Czech Republic472 scientistsin 2023

Explore other countries

Single-year list2023

United Kingdom16,795 scientistsin 2023

Sweden2,548 scientistsin 2023

Denmark1,958 scientistsin 2023

Norway1,188 scientistsin 2023

Finland1,109 scientistsin 2023

Estonia77 scientistsin 2023

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Frequently asked questions

How many scientists from Ireland are in the 2023 Stanford Top 2% list?

777 scientists affiliated with Ireland are on the 2023 single-year list, and 769 are on the career-long list.

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

On the 2023 single-year list, University College Dublin has the most listed scientists from Ireland, with 144. 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 777 in 2023, a change of +32.6%.

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.