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" (873,690 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: 1
Zahid Ahmad Butt
Epidemiology
Public Health
Global Health
Syndemics
Metrics
H-Index
i10 Index
Citation
85
156
148,419
* Rankings
Ranking Based On Selection: 2
John P Hirdes
health care
aging
mental health
home care
nursing homes
Metrics
H-Index
i10 Index
Citation
71
263
18,782
* Rankings
Ranking Based On Selection: 3
Paul Stolee
geriatric health systems
health outcome measurement
health care transitions
Metrics
H-Index
i10 Index
Citation
59
157
12,009
* Rankings
Ranking Based On Selection: 4
Mark Ferro
Youth Multimorbidity
Youth Mental Health
Health-related Quality of Life
Psychiatric Epidemiology
Metrics
H-Index
i10 Index
Citation
41
122
5,726
* Rankings
Ranking Based On Selection: 5
Ellen Maceachen
work and health
qualitative research methods
policy and program evaluation
critical social theory
Metrics
H-Index
i10 Index
Citation
41
78
5,493
* Rankings
Ranking Based On Selection: 8
Philip Bigelow
work and health
occupational health
epidemiology
environmental health
risk assessment
Metrics
H-Index
i10 Index
Citation
38
70
4,319
* Rankings
Ranking Based On Selection: 9
Mark Oremus
Epidemiology
Aging
Chronic disease
Health-related quality-of-life
Social determinants of health
Metrics
H-Index
i10 Index
Citation
36
86
7,174
* Rankings
Ranking Based On Selection: 10
Suzanne Tyas
Epidemiology
Aging
Alzheimer's Disease
Cognitive Reserve
Metrics
H-Index
i10 Index
Citation
36
57
5,958

Enroll all your faculty members with discounted institutional membership to showcase your institution's academic strength to the world in the best way possible – join now and achieve results fast! 

* Rankings
Ranking Based On Selection: 12
Elena Neiterman
migration
health human resources
pregnancy
midwifery
health policy
Metrics
H-Index
i10 Index
Citation
27
51
2,679
* Rankings
Ranking Based On Selection: 13
Katelyn Godin
Public health policy
nutrition
knowledge translation
youth health
substance use policy
Metrics
H-Index
i10 Index
Citation
16
18
1,783
* Rankings
Ranking Based On Selection: 14
Jenna Dixon
health equity
health geography
global health
gender and feminist studies
knowledge translation
Metrics
H-Index
i10 Index
Citation
15
20
1,361
* Rankings
Ranking Based On Selection: 15
Gillian Williams
Epidemiology
Substance use
Mental health
Lifestyle behaviours
Metrics
H-Index
i10 Index
Citation
13
15
941
Tiana Ciccarelli
Public Health
Oral Health
Mental Health
Substance Use
Biostatistics
Metrics
H-Index
i10 Index
Citation
2
1
83
Ji Won Kang
Public health
Epidemiology
Social determinants of health
Aging
Cognition
Metrics
H-Index
i10 Index
Citation
2
1
21
Rankings
Ranking Based On Selection: 1
Zahid Ahmad Butt
Metrics
H-Index
i10 Index
Citation Counts
85
156
148,419
Rankings
Ranking Based On Selection: 2
John P Hirdes
Metrics
H-Index
i10 Index
Citation Counts
71
263
18,782
Rankings
Ranking Based On Selection: 3
Paul Stolee
Metrics
H-Index
i10 Index
Citation Counts
59
157
12,009
geriatric health systems
health outcome measurement
health care transitions
Rankings
Ranking Based On Selection: 4
Mark Ferro
Metrics
H-Index
i10 Index
Citation Counts
41
122
5,726
Youth Multimorbidity
Youth Mental Health
Health-related Quality of Life
Psychiatric Epidemiology
Rankings
Ranking Based On Selection: 5
Ellen Maceachen
Metrics
H-Index
i10 Index
Citation Counts
41
78
5,493
work and health
qualitative research methods
policy and program evaluation
critical social theory
Rankings
Ranking Based On Selection: 6
Mahmood Reza Gohari
Metrics
H-Index
i10 Index
Citation Counts
39
127
5,920
Rankings
Ranking Based On Selection: 7
Jose F Arocha
Metrics
H-Index
i10 Index
Citation Counts
39
64
5,511
Rankings
Ranking Based On Selection: 8
Philip Bigelow
Metrics
H-Index
i10 Index
Citation Counts
38
70
4,319
work and health
occupational health
epidemiology
environmental health
risk assessment
Rankings
Ranking Based On Selection: 9
Mark Oremus
Metrics
H-Index
i10 Index
Citation Counts
36
86
7,174
Epidemiology
Aging
Chronic disease
Health-related quality-of-life
Social determinants of health
Rankings
Ranking Based On Selection: 10
Suzanne Tyas
Metrics
H-Index
i10 Index
Citation Counts
36
57
5,958

Enroll all your faculty members with discounted institutional membership to showcase your institution's academic strength to the world in the best way possible – join now and achieve results fast! 

Rankings
Ranking Based On Selection: 11
Jessica L Reid
Metrics
H-Index
i10 Index
Citation Counts
33
59
4,430
Rankings
Ranking Based On Selection: 12
Elena Neiterman
Metrics
H-Index
i10 Index
Citation Counts
27
51
2,679
migration
health human resources
pregnancy
midwifery
health policy
Rankings
Ranking Based On Selection: 13
Katelyn Godin
Metrics
H-Index
i10 Index
Citation Counts
16
18
1,783
Public health policy
nutrition
knowledge translation
youth health
substance use policy
Rankings
Ranking Based On Selection: 14
Jenna Dixon
Metrics
H-Index
i10 Index
Citation Counts
15
20
1,361
health equity
health geography
global health
gender and feminist studies
knowledge translation
Rankings
Ranking Based On Selection: 15
Gillian Williams
Metrics
H-Index
i10 Index
Citation Counts
13
15
941
Epidemiology
Substance use
Mental health
Lifestyle behaviours
Rankings
Ranking Based On Selection: 16
Ednah Ototo
Metrics
H-Index
i10 Index
Citation Counts
8
8
404
Rankings
Ranking Based On Selection: 17
Tiana Ciccarelli
Metrics
H-Index
i10 Index
Citation Counts
2
1
83
Public Health
Oral Health
Mental Health
Substance Use
Biostatistics
Rankings
Ranking Based On Selection: 18
Ji Won Kang
Metrics
H-Index
i10 Index
Citation Counts
2
1
21
Public health
Epidemiology
Social determinants of health
Aging
Cognition