Top 100 Scientists

World Top 100 Scientists 2025

Top 100 scientists can be ranked globally or specific to the following regions including Africa, Asia, Europe, North America, Latin America, Oceania, Arab League, ASEAN, EECA, and BRICS based on total H-index scores without any breakdown by subject areas. Top 100 rankings in the world, in a continent, or a region include standardized subjects areas of Agriculture & Forestry, Arts, Design and Architecture, Business & Management, Economics & Econometrics, Education, Engineering & Technology, History, Philosophy, Theology, Law/Law and Legal Studies, Medical and Health Sciences, Natural Sciences, Social Sciences, Art and Humanities Rankings and Social Sciences and Humanities Rankings BETA VERSION. Subject field ranking in world, region, country and university is beta version since subject field "others" (931,956 scientists profile whose branch cannot be determined, not yet edited or determined) is excluded, so the ranking will change as the others fields are edited. Please note that. Subjects indicated as “ * others ” will not be included in the ranking by regions and subjects.

* Rankings
Ranking Based On Selection: 3
Yvonne Höller
quantitative electroencephalography
epilepsy
EEG-biometrics
Metrics
H-Index
i10 Index
Citation
41
93
5,349
* Rankings
Ranking Based On Selection: 4
Thoroddur Bjarnason
rural regional migration youth
Metrics
H-Index
i10 Index
Citation
40
82
10,249
* Rankings
Ranking Based On Selection: 7
Eva Halapi
Immunology
inflammation
molecular immunology
Metrics
H-Index
i10 Index
Citation
32
47
4,783
* Rankings
Ranking Based On Selection: 9
Oddur Vilhelmsson
Microbial ecology
Arctic bacteria
proteomics
metagenomics
Metrics
H-Index
i10 Index
Citation
17
19
1,086

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* Rankings
Ranking Based On Selection: 11
Sigurður Kristinsson
Ethics
bioethics
political philosophy
professionalism
Metrics
H-Index
i10 Index
Citation
15
16
2,080
* Rankings
Ranking Based On Selection: 13
Sean Scully
Biocatalysis
microbiology
extremophiles
thermophiles
Algal biotechnology
Metrics
H-Index
i10 Index
Citation
13
16
518
* Rankings
Ranking Based On Selection: 14
Thrudur Gunnarsdottir
Childhood obesity
family-based treatment
evidence-based practice
Metrics
H-Index
i10 Index
Citation
13
15
697
* Rankings
Ranking Based On Selection: 15
Guðmundur Oddsson
Class Analysis
Social Control and Deviance
Metrics
H-Index
i10 Index
Citation
13
13
644
* Rankings
Ranking Based On Selection: 16
Gardar Arnason
Ethics
Philosophy of Education
Philosophy of Science
Neuroethics
Bioethics
Metrics
H-Index
i10 Index
Citation
13
18
420
* Rankings
Ranking Based On Selection: 17
Margrét Hrönn Svavarsdóttir
coronary heart disease prevention
Metrics
H-Index
i10 Index
Citation
12
14
660
* Rankings
Ranking Based On Selection: 20
Rúnar Sigþórsson
School improvement
curriculum
teaching organisation
learning and assessment
Metrics
H-Index
i10 Index
Citation
12
17
750
* Rankings
Ranking Based On Selection: 23
Rachael Lorna Johnstone
international law
polar law
human rights
indigenous peoples
environmental law
Metrics
H-Index
i10 Index
Citation
11
14
525
* Rankings
Ranking Based On Selection: 24
Stefán B. Gunnlaugsson
Fisheries economics
Sustainability
Finance
Economics
Metrics
H-Index
i10 Index
Citation
11
11
381
* Rankings
Ranking Based On Selection: 25
Thanh Viet Nguyen
Bioeconomic Modeling
Fisheries Economics
Fisheries Management
Environmental and Resource
Metrics
H-Index
i10 Index
Citation
10
12
345
* Rankings
Ranking Based On Selection: 26
Hjördís Sigursteinsdóttir
Working live
Occupational health and well-being
Gender
Management and HR
Metrics
H-Index
i10 Index
Citation
10
11
381
* Rankings
Ranking Based On Selection: 29
Árni Gunnar Ásgeirsson
Visual Cognition
Attention
Memory & Synesthesia
Metrics
H-Index
i10 Index
Citation
9
9
403
* Rankings
Ranking Based On Selection: 31
Hafdís Skuladottir
Nursing
Chronic pain
rehabilitation
nursing education
clinical supervision
Metrics
H-Index
i10 Index
Citation
9
9
362
* Rankings
Ranking Based On Selection: 36
Sigrun Sveinbjornsdottir
adolescent coping
sexual orientation
Metrics
H-Index
i10 Index
Citation
7
7
347
* Rankings
Ranking Based On Selection: 37
Hilal H. Sen
peer relations
synchrony
morality
curiosity and exploration
Metrics
H-Index
i10 Index
Citation
7
6
234
* Rankings
Ranking Based On Selection: 38
Gisli Kristofersson
Mental health
integrative mental health
therapeutic alliance
mindfulness
men in nursing
Metrics
H-Index
i10 Index
Citation
7
6
336
* Rankings
Ranking Based On Selection: 40
Adam Fishwick
International Political Economy
Latin America
Labour Studies
Development Studies
Metrics
H-Index
i10 Index
Citation
7
6
150
* Rankings
Ranking Based On Selection: 42
Guðrún Þóra Gunnarsdóttir
destination development
tourism impacts
tourism research
Metrics
H-Index
i10 Index
Citation
7
7
233
* Rankings
Ranking Based On Selection: 43
Cynthia Thủy Đinh
Family Business
Governance
Board of Directors
Entrepreneurship
International Business
Metrics
H-Index
i10 Index
Citation
7
5
281
* Rankings
Ranking Based On Selection: 44
Nanna Yr Arnardottir
physical activity
sleep
physiology
Metrics
H-Index
i10 Index
Citation
6
6
502
* Rankings
Ranking Based On Selection: 45
Sigrún Sigurðardóttir
Violence
Child Sexual Abuse
Trauma
Trauma Informed care
Trauma informed service
Metrics
H-Index
i10 Index
Citation
6
5
379
* Rankings
Ranking Based On Selection: 46
Audbjorg Bjornsdottir
statistics education
online education
cooperative learning
distance learning
Metrics
H-Index
i10 Index
Citation
6
5
188
* Rankings
Ranking Based On Selection: 47
Eyjolfur Gudmundsson
Economics of virtual worlds
resource economics
fisheries economics.
Metrics
H-Index
i10 Index
Citation
6
5
681
* Rankings
Ranking Based On Selection: 48
Anna Ólafsdóttir
Higher Education – HE teaching
HE learning
quality aspects of HE
Educational technology in HE
Metrics
H-Index
i10 Index
Citation
6
3
217
* Rankings
Ranking Based On Selection: 49
Huginn F Thorsteinsson
Philosophy of science
semantics
reference
theoretical terms
Metrics
H-Index
i10 Index
Citation
6
3
96
* Rankings
Ranking Based On Selection: 52
Hulda Bryngeirsdottir
Posttraumatic Growth
Healing and helpseeking
Intimate partner violence
Rehabilitation
Metrics
H-Index
i10 Index
Citation
4
4
130
* Rankings
Ranking Based On Selection: 53
Lara Wilhelmine Hoffmann
Migration
Language Learning
Art
Arctic
International Migration to Rural Places
Metrics
H-Index
i10 Index
Citation
4
1
49
* Rankings
Ranking Based On Selection: 54
Kristin Thórarinsdóttir / Þórarinsdóttir
person-centred care
person participation
elderly care
nursing documentation
health assessment
Metrics
H-Index
i10 Index
Citation
4
4
268
* Rankings
Ranking Based On Selection: 57
Hólmdís Methúsalemsdóttir
participation
children
quality of life
universal design
play
Metrics
H-Index
i10 Index
Citation
3
1
27
* Rankings
Ranking Based On Selection: 58
Ívar Rafn
Assessment for learning
formative assessment
feedback
assessment culture
Metrics
H-Index
i10 Index
Citation
2
2
103
* Rankings
Ranking Based On Selection: 60
Martha Lilja Olsen
leadership
management
history
microhistory
public administration
Metrics
H-Index
i10 Index
Citation
1
0
4
Rankings
Ranking Based On Selection: 1
ޞorvaldur Ingvarsson
Metrics
H-Index
i10 Index
Citation Counts
43
68
8,733
Rankings
Ranking Based On Selection: 2
Kjartan Ólafsson
Metrics
H-Index
i10 Index
Citation Counts
42
77
11,969
Rankings
Ranking Based On Selection: 3
Yvonne Höller
Metrics
H-Index
i10 Index
Citation Counts
41
93
5,349
quantitative electroencephalography
epilepsy
EEG-biometrics
Rankings
Ranking Based On Selection: 4
Thoroddur Bjarnason
Metrics
H-Index
i10 Index
Citation Counts
40
82
10,249
rural regional migration youth
Rankings
Ranking Based On Selection: 5
Sigridur Halldorsdottir
Metrics
H-Index
i10 Index
Citation Counts
39
60
7,052
Rankings
Ranking Based On Selection: 6
Steingrimur Jonsson
Metrics
H-Index
i10 Index
Citation Counts
32
53
3,201
Rankings
Ranking Based On Selection: 7
Eva Halapi
Metrics
H-Index
i10 Index
Citation Counts
32
47
4,783
Rankings
Ranking Based On Selection: 8
Genetics
Genomics
Conservation Biology
Ophthalmology
Cancer
Rankings
Ranking Based On Selection: 9
Oddur Vilhelmsson
Metrics
H-Index
i10 Index
Citation Counts
17
19
1,086
Microbial ecology
Arctic bacteria
proteomics
metagenomics
Rankings
Ranking Based On Selection: 10
Stefan B Sigurdsson
Metrics
H-Index
i10 Index
Citation Counts
16
21
3,485

Maximize your institution's potential with our 360° Institutional Analysis Subscription and Institutional Exclusive Package, offering comprehensive insights and strategic advantages.

Rankings
Ranking Based On Selection: 11
Sigurður Kristinsson
Metrics
H-Index
i10 Index
Citation Counts
15
16
2,080
Ethics
bioethics
political philosophy
professionalism
Rankings
Ranking Based On Selection: 12
Sigfríður Inga Karlsdóttir
Metrics
H-Index
i10 Index
Citation Counts
14
16
1,992
Rankings
Ranking Based On Selection: 13
Sean Scully
Metrics
H-Index
i10 Index
Citation Counts
13
16
518
Biocatalysis
microbiology
extremophiles
thermophiles
Algal biotechnology
Rankings
Ranking Based On Selection: 14
Thrudur Gunnarsdottir
Metrics
H-Index
i10 Index
Citation Counts
13
15
697
Childhood obesity
family-based treatment
evidence-based practice
Rankings
Ranking Based On Selection: 15
Guðmundur Oddsson
Metrics
H-Index
i10 Index
Citation Counts
13
13
644
Class Analysis
Social Control and Deviance
Rankings
Ranking Based On Selection: 16
Gardar Arnason
Metrics
H-Index
i10 Index
Citation Counts
13
18
420
Ethics
Philosophy of Education
Philosophy of Science
Neuroethics
Bioethics
Rankings
Ranking Based On Selection: 17
Margrét Hrönn Svavarsdóttir
Metrics
H-Index
i10 Index
Citation Counts
12
14
660
coronary heart disease prevention
Rankings
Ranking Based On Selection: 18
Eydís K. Sveinbjarnardóttir
Metrics
H-Index
i10 Index
Citation Counts
12
12
909
Rankings
Ranking Based On Selection: 19
Gudmundur Kristjan Oskarsson
Metrics
H-Index
i10 Index
Citation Counts
12
13
425
Rankings
Ranking Based On Selection: 20
Rúnar Sigþórsson
Metrics
H-Index
i10 Index
Citation Counts
12
17
750
School improvement
curriculum
teaching organisation
learning and assessment
Rankings
Ranking Based On Selection: 21
Hreidar Valtysson
Metrics
H-Index
i10 Index
Citation Counts
12
14
610
Rankings
Ranking Based On Selection: 22
Grétar Thór Eythórsson
Metrics
H-Index
i10 Index
Citation Counts
12
13
486
Rankings
Ranking Based On Selection: 23
Rachael Lorna Johnstone
Metrics
H-Index
i10 Index
Citation Counts
11
14
525
international law
polar law
human rights
indigenous peoples
environmental law
Rankings
Ranking Based On Selection: 24
Stefán B. Gunnlaugsson
Metrics
H-Index
i10 Index
Citation Counts
11
11
381
Fisheries economics
Sustainability
Finance
Economics
Rankings
Ranking Based On Selection: 25
Thanh Viet Nguyen
Metrics
H-Index
i10 Index
Citation Counts
10
12
345
Bioeconomic Modeling
Fisheries Economics
Fisheries Management
Environmental and Resource
Rankings
Ranking Based On Selection: 26
Hjördís Sigursteinsdóttir
Metrics
H-Index
i10 Index
Citation Counts
10
11
381
Working live
Occupational health and well-being
Gender
Management and HR
Rankings
Ranking Based On Selection: 27
Gudbjorg Hildur Kolbeins
Metrics
H-Index
i10 Index
Citation Counts
10
10
498
Rankings
Ranking Based On Selection: 28
Ragnheidur Harpa Arnardóttir
Metrics
H-Index
i10 Index
Citation Counts
9
9
567
Rankings
Ranking Based On Selection: 29
Árni Gunnar Ásgeirsson
Metrics
H-Index
i10 Index
Citation Counts
9
9
403
Visual Cognition
Attention
Memory & Synesthesia
Rankings
Ranking Based On Selection: 30
Guðmundur Heiðar Frimannsson
Metrics
H-Index
i10 Index
Citation Counts
9
9
382
Ethics
Philosophy of Education
Political Philosophy
Rankings
Ranking Based On Selection: 31
Hafdís Skuladottir
Metrics
H-Index
i10 Index
Citation Counts
9
9
362
Nursing
Chronic pain
rehabilitation
nursing education
clinical supervision
Rankings
Ranking Based On Selection: 32
Kristín M. Jóhannsdóttir
Metrics
H-Index
i10 Index
Citation Counts
9
8
313
Icelandic
linguistics
semantics
aspect
pedagogy
Rankings
Ranking Based On Selection: 33
Birgir Guðmundsson
Metrics
H-Index
i10 Index
Citation Counts
9
8
240
Rankings
Ranking Based On Selection: 34
M. Audur Sigurbjornsdottir
Metrics
H-Index
i10 Index
Citation Counts
8
8
432
Rankings
Ranking Based On Selection: 35
Richard Tahtinen
Metrics
H-Index
i10 Index
Citation Counts
8
8
245
Rankings
Ranking Based On Selection: 36
Sigrun Sveinbjornsdottir
Metrics
H-Index
i10 Index
Citation Counts
7
7
347
adolescent coping
sexual orientation
Rankings
Ranking Based On Selection: 37
Hilal H. Sen
Metrics
H-Index
i10 Index
Citation Counts
7
6
234
peer relations
synchrony
morality
curiosity and exploration
Rankings
Ranking Based On Selection: 38
Gisli Kristofersson
Metrics
H-Index
i10 Index
Citation Counts
7
6
336
Mental health
integrative mental health
therapeutic alliance
mindfulness
men in nursing
Rankings
Ranking Based On Selection: 39
Markus Meckl
Metrics
H-Index
i10 Index
Citation Counts
7
6
224
Rankings
Ranking Based On Selection: 40
Adam Fishwick
Metrics
H-Index
i10 Index
Citation Counts
7
6
150
International Political Economy
Latin America
Labour Studies
Development Studies
Rankings
Ranking Based On Selection: 41
Sigridur Sia Jonsdottir
Metrics
H-Index
i10 Index
Citation Counts
7
5
479
Rankings
Ranking Based On Selection: 42
Guðrún Þóra Gunnarsdóttir
Metrics
H-Index
i10 Index
Citation Counts
7
7
233
destination development
tourism impacts
tourism research
Rankings
Ranking Based On Selection: 43
Cynthia Thủy Đinh
Metrics
H-Index
i10 Index
Citation Counts
7
5
281
Family Business
Governance
Board of Directors
Entrepreneurship
International Business
Rankings
Ranking Based On Selection: 44
Nanna Yr Arnardottir
Metrics
H-Index
i10 Index
Citation Counts
6
6
502
physical activity
sleep
physiology
Rankings
Ranking Based On Selection: 45
Sigrún Sigurðardóttir
Metrics
H-Index
i10 Index
Citation Counts
6
5
379
Violence
Child Sexual Abuse
Trauma
Trauma Informed care
Trauma informed service
Rankings
Ranking Based On Selection: 46
Audbjorg Bjornsdottir
Metrics
H-Index
i10 Index
Citation Counts
6
5
188
statistics education
online education
cooperative learning
distance learning
Rankings
Ranking Based On Selection: 47
Eyjolfur Gudmundsson
Metrics
H-Index
i10 Index
Citation Counts
6
5
681
Economics of virtual worlds
resource economics
fisheries economics.
Rankings
Ranking Based On Selection: 48
Anna Ólafsdóttir
Metrics
H-Index
i10 Index
Citation Counts
6
3
217
Higher Education – HE teaching
HE learning
quality aspects of HE
Educational technology in HE
Rankings
Ranking Based On Selection: 49
Huginn F Thorsteinsson
Metrics
H-Index
i10 Index
Citation Counts
6
3
96
Philosophy of science
semantics
reference
theoretical terms
Rankings
Ranking Based On Selection: 50
Andrea Hjálmsdóttir
Metrics
H-Index
i10 Index
Citation Counts
5
3
599
Rankings
Ranking Based On Selection: 51
Guðmundur Engilbertsson
Metrics
H-Index
i10 Index
Citation Counts
5
1
62
Rankings
Ranking Based On Selection: 52
Hulda Bryngeirsdottir
Metrics
H-Index
i10 Index
Citation Counts
4
4
130
Posttraumatic Growth
Healing and helpseeking
Intimate partner violence
Rehabilitation
Rankings
Ranking Based On Selection: 53
Lara Wilhelmine Hoffmann
Metrics
H-Index
i10 Index
Citation Counts
4
1
49
Migration
Language Learning
Art
Arctic
International Migration to Rural Places
Rankings
Ranking Based On Selection: 54
Kristin Thórarinsdóttir / Þórarinsdóttir
Metrics
H-Index
i10 Index
Citation Counts
4
4
268
person-centred care
person participation
elderly care
nursing documentation
health assessment
Rankings
Ranking Based On Selection: 55
Finnur Friðriksson
Metrics
H-Index
i10 Index
Citation Counts
4
4
203
Rankings
Ranking Based On Selection: 56
Kristjana Fenger
Metrics
H-Index
i10 Index
Citation Counts
4
3
128
Rankings
Ranking Based On Selection: 57
Hólmdís Methúsalemsdóttir
Metrics
H-Index
i10 Index
Citation Counts
3
1
27
participation
children
quality of life
universal design
play
Rankings
Ranking Based On Selection: 58
Ívar Rafn
Metrics
H-Index
i10 Index
Citation Counts
2
2
103
Assessment for learning
formative assessment
feedback
assessment culture
Rankings
Ranking Based On Selection: 59
Sólveig Zophoníasdóttir
Metrics
H-Index
i10 Index
Citation Counts
2
0
10
Rankings
Ranking Based On Selection: 60
Martha Lilja Olsen
Metrics
H-Index
i10 Index
Citation Counts
1
0
4
leadership
management
history
microhistory
public administration
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