Ireland's Top 2% Scientists 2023: Career-Long List

Ireland has 769 scientists on the 2023 career-long Top 2% list, up 6.7% from 721 in 2022. That places Ireland 33rd in the world by number of listed scientists, down 1 place. University College Dublin has the most listed scientists (134), 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

#33

down 1 place vs 2022

Institutes

-13 (-12.6%) vs 2022

Scientists in Ireland on the list, by year

The career-long count has grown 41% 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 list2023

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All 769 scientists

Career-long 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	348	OL O'Neill, Luke A.J.	Trinity College Dublin	Immunology	Rank 22
2	624	CJ Coey, J. M.D.	Trinity College Dublin	Applied Physics	Rank 26
3	681	SP Serruys, Patrick W.	University of Galway	Cardiovascular System & Hematology	Rank 36
4	1,251	CJ Coleman, Jonathan N.	Trinity College Dublin	Nanoscience & Nanotechnology	Rank 36
5	1,749	DT Dinan, Timothy G.	APC Microbiome Ireland	Psychiatry	Rank 60
6	1,795	SF Shanahan, Fergus	APC Microbiome Ireland	Gastroenterology & Hepatology	Rank 28
7	2,321	ZM Zaworotko, Michael J.	University of Limerick	Organic Chemistry	Rank 66
8	2,656	DM Duffy, Michael J.	St Vincent's University Hospital	Oncology & Carcinogenesis	Rank 120
9	4,179	AF Aharonian, Felix	Institiúid Ard-Lénn Bhaile Átha Cliath	Astronomy & Astrophysics	Rank 25
10	4,213	EH Eysenck, H. J.	King's College London	Social Psychology	Rank 63
11	4,319	TR Tremblay, Richard E.	University College Dublin	Developmental & Child Psychology	Rank 43
12	4,464	WK Wolfe, Kenneth H.	University College Dublin	Developmental Biology	Rank 236
13	4,553	HD Higgins, Desmond G.	UCD School of Medicine	Bioinformatics	Rank 16
14	4,736	MS Martin, Seamus J.	Trinity College Dublin	Biochemistry & Molecular Biology	Rank 234
15	4,948	CJ Cryan, John F.	University College Cork	Neurology & Neurosurgery	Rank 441
16	5,305	OE O'Brien, Eoin	UCD School of Medicine	Cardiovascular System & Hematology	Rank 265
17	5,309	HC Hill, Colin	APC Microbiome Ireland	Microbiology	Rank 129
18	5,414	VM van Mechelen, Willem	University College Dublin	Sport Sciences	Rank 15
19	5,432	KW Kolch, Walter	University College Dublin	Biochemistry & Molecular Biology	Rank 262
20	5,602	BG Biesta, Gert J.J.	Maynooth University	Education	Rank 15
21	5,739	KR Kitchin, Rob	Maynooth University	Geography	Rank 13
22	6,142	LB Leonard, Brian	University of Galway	Psychiatry	Rank 173
23	6,184	OP O'Brien, Peter J.	University College Dublin	Biochemistry & Molecular Biology	Rank 313
24	6,579	MK Mills, Kingston H.G.	Trinity College Dublin	Immunology	Rank 256
25	7,164	OF O'Brien, Fergal J.	Trinity College Dublin	Biomedical Engineering	Rank 30
26	7,910	FP Fox, P. F.	University College Cork	Dairy & Animal Science	Rank 7
27	8,363	DS de Silva, A. Prasanna	Queen's University Belfast	Organic Chemistry	Rank 177
28	9,166	RI Robertson, Ian	Trinity College Dublin	Experimental Psychology	Rank 150
29	9,262	EK Eckardt, Kai Uwe	University of Galway	Urology & Nephrology	Rank 89
30	9,649	KP Kelly, Patrick	Tallaght University Hospital	Neurology & Neurosurgery	Rank 820
31	9,832	LM Lynch, Marina A.	Trinity College Dublin	Neurology & Neurosurgery	Rank 834
32	9,853	SS Sanvito, Stefano	Trinity College Dublin	Applied Physics	Rank 255
33	10,195	FM Ferguson, Mark W.J.	Science Foundation Ireland	Developmental Biology	Rank 486
34	11,158	CH Curran, Henry	University of Galway	Energy	Rank 108
35	11,521	LJ Luong, John H.T.	University College Cork	Analytical Chemistry	Rank 60
36	11,649	TD Taylor, David	Trinity College Dublin	Mechanical Engineering & Transports	Rank 76
37	11,656	IR Irvine, Robin	Dept of Pharmacology	Biochemistry & Molecular Biology	Rank 569
38	12,196	RY Roos, Yrjö	University College Cork	Food Science	Rank 37
39	13,246	MW McNicholas, Walter T.	St Vincent's University Hospital	Respiratory System	Rank 131
40	13,316	WW Wijns, William	University of Galway	Cardiovascular System & Hematology	Rank 618
41	13,599	TB Tiwari, Brijesh K.	Moorepark Food Research Centre	Food Science	Rank 45
42	14,076	CP Cotter, Paul D.	Moorepark Food Research Centre	Microbiology	Rank 333
43	14,667	CS Connon, Stephen J.	Trinity College Dublin	Organic Chemistry	Rank 321
44	14,779	RR Ross, R. Paul	APC Microbiome Ireland	Microbiology	Rank 351
45	14,984	CT Cotter, Thomas G.	University College Cork	Biochemistry & Molecular Biology	Rank 731
46	15,634	OD O’Regan, Donal	University of Galway	General Mathematics	Rank 37
47	15,762	GT Gunnlaugsson, Thorfinnur	Trinity College Dublin	Organic Chemistry	Rank 346
48	16,042	KB Kholodenko, Boris N.	University College Dublin	Biochemistry & Molecular Biology	Rank 784
49	16,337	HM Hutton, Michael	St Vincent's University Hospital	Neurology & Neurosurgery	Rank 1,317
50	16,965	DK Dawson, Kenneth A.	University College Dublin	Nanoscience & Nanotechnology	Rank 206
51	17,820	KR Kenny, Rose Anne	St James's Hospital	Geriatrics	Rank 28
52	17,868	GI Graham, Ian	Trinity College Dublin	Cardiovascular System & Hematology	Rank 780
53	17,959	DG Dickens, G. R.	Trinity College Dublin	Geochemistry & Geophysics	Rank 277
54	18,064	WM Wilm, Matthias	University College Dublin	Developmental Biology	Rank 752
55	18,265	PP Puri, Prem	University College Dublin	Pediatrics	Rank 77
56	18,361	SJ Scott, John M.	School of Medicine, Trinity College Dublin	Nutrition & Dietetics	Rank 141
57	18,507	CM Caffrey, Martin	Trinity College Dublin	Biophysics	Rank 33
58	18,660	BB Bresnihan, Barry	University College Dublin	Arthritis & Rheumatology	Rank 151
59	18,765	CR Chetty, Runjan	Deciphex/Diagnexia (Pty/Ltd)	Pathology	Rank 65
60	19,026	WJ Waddington, John L.	Royal College of Surgeons in Ireland	Psychiatry	Rank 498
61	19,178	CK Cashman, Kevin D.	University College Cork	Nutrition & Dietetics	Rank 155
62	19,876	GS Ghosh, Subrata	APC Microbiome Ireland	Gastroenterology & Hepatology	Rank 323
63	19,996	LP Lonergan, Pat	University College Dublin	Obstetrics & Reproductive Medicine	Rank 149
64	21,149	BJ Boland, John J.	Trinity College Dublin	Nanoscience & Nanotechnology	Rank 248
65	21,468	SM Senge, Mathias O.	Trinity College Dublin	Organic Chemistry	Rank 443
66	21,809	DC Dorman, Charles J.	Trinity College Dublin	Microbiology	Rank 542
67	21,826	MP McSweeney, Paul L.H.	University College Cork	Dairy & Animal Science	Rank 30
68	22,156	ME Morris, Edwin R.	University College Cork	Polymers	Rank 189
69	22,689	TD Tobin, Desmond J.	University College Dublin	Dermatology & Venereal Diseases	Rank 114
70	23,466	HO Hardiman, Orla	Trinity College Dublin	Neurology & Neurosurgery	Rank 1,846
71	24,156	TC Taylor, Cormac T.	UCD School of Medicine	Biochemistry & Molecular Biology	Rank 1,120
72	24,511	WJ Walter, Jens	APC Microbiome Ireland	Microbiology	Rank 615
73	24,804	MB McCleary, Barry V.	Fibercarb	Food Science	Rank 92
74	25,897	RL Rezzolla, Luciano	Trinity College Dublin	Astronomy & Astrophysics	Rank 265
75	26,200	FP Fallon, Padraic G.	School of Medicine, Trinity College Dublin	Immunology	Rank 888
76	26,378	WM Weiser, Martin R.	St Vincent's University Hospital	Oncology & Carcinogenesis	Rank 1,201
77	26,817	JA Jones, Alan G.	Institiúid Ard-Lénn Bhaile Átha Cliath	Geochemistry & Geophysics	Rank 442
78	27,151	FR FitzGerald, Richard J.	University of Limerick	Food Science	Rank 103
79	28,153	CK Conlon, Kevin C.	Tallaght University Hospital	Surgery	Rank 220
80	28,791	CJ Crown, John	St Vincent's University Hospital	Oncology & Carcinogenesis	Rank 1,315
81	28,987	OP O'Toole, Paul W.	APC Microbiome Ireland	Microbiology	Rank 734
82	29,371	AR Anwyl, Roger	Trinity College Dublin	Neurology & Neurosurgery	Rank 2,228
83	29,646	BF Barry, Frank	University of Galway	Biomedical Engineering	Rank 124
84	29,650	PJ Prehn, Jochen H.M.	Royal College of Surgeons in Ireland	Neurology & Neurosurgery	Rank 2,245
85	30,326	CR Conroy, Ronan	Royal College of Surgeons in Ireland	General & Internal Medicine	Rank 420
86	30,473	FB Fitzgerald, Brian	University of Limerick	Information Systems	Rank 70
87	30,582	SB Smyth, Barry	University College Dublin	Artificial Intelligence & Image Processing	Rank 606
88	31,050	PI Perry, Ivan J.	University College Cork	General & Internal Medicine	Rank 431
89	31,231	BA Bowie, Andrew G.	Trinity College Dublin	Immunology	Rank 1,023
90	31,265	IA Irvine, Alan D.	Trinity College Dublin	Dermatology & Venereal Diseases	Rank 166
91	31,394	CI Coyne, Imelda	Trinity College Dublin	Nursing	Rank 33
92	31,436	GM Gibney, Mike	University College Dublin	Nutrition & Dietetics	Rank 245
93	31,767	DL Drury, Luke	Institiúid Ard-Lénn Bhaile Átha Cliath	Astronomy & Astrophysics	Rank 344
94	32,729	MF Milano, Federico	University College Dublin	Energy	Rank 360
95	32,996	OC O'Dowd, Colin	University of Galway	Meteorology & Atmospheric Sciences	Rank 468
96	33,965	MN McElvaney, Noel G.	Beaumont Hospital	Respiratory System	Rank 347
97	34,084	GM Gill, Michael	Trinity College Dublin	Psychiatry	Rank 752
98	34,235	NM Nolan, Michael	Tyndall National Institute	Chemical Physics	Rank 758
99	34,515	HM Hutchinson, Michael	St Vincent's University Hospital	Neurology & Neurosurgery	Rank 2,555
100	34,581	LB Lawlor, B.	St James's Hospital	Geriatrics	Rank 56
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Countries with a similar count

Career-long list2023

Russia906 scientistsin 2023

Iran871 scientistsin 2023

South Africa775 scientistsin 2023

Saudi Arabia576 scientistsin 2023

Portugal572 scientistsin 2023

Czech Republic513 scientistsin 2023

Explore other countries

Career-long list2023

United Kingdom18,692 scientistsin 2023

Sweden3,200 scientistsin 2023

Denmark2,034 scientistsin 2023

Finland1,364 scientistsin 2023

Norway1,315 scientistsin 2023

Estonia67 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 career-long list, University College Dublin has the most listed scientists from Ireland, with 134. It is followed by Trinity College Dublin with 128.

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 769 in 2023, a change of +40.6%.

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.