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" (870,053 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
Rajiv Chowdhury
Epidemiology
Global Public Health
Low and middle income countries
Non-communicable Diseases
COVID-19
Metrics
H-Index
i10 Index
Citation
83
117
115,321
* Rankings
Ranking Based On Selection: 2
Wasim Maziak
tobacco control
emerging tobacco products
cardiovascular health
Metrics
H-Index
i10 Index
Citation
68
199
20,719
* Rankings
Ranking Based On Selection: 3
Jason R Richardson
Neurotoxicology
environmental neuroscience
Neuroinflammation
Parkinson's Disease
Alzheimer's
Metrics
H-Index
i10 Index
Citation
55
106
10,297
* Rankings
Ranking Based On Selection: 4
Mary Jo Trepka
infectious disease epidemiology
social determinants of infectious diseases
Metrics
H-Index
i10 Index
Citation
35
96
4,716
* Rankings
Ranking Based On Selection: 5
Nasar U Ahmed
Cancer epidemiology
health disparity
chronic disease risk factors
methods
Metrics
H-Index
i10 Index
Citation
32
72
3,150
Mohammad Ebrahimi Kalan
Behavioral Epidemiology
Causal Inference
Health Disparities
Tobacco Control
AI & Health
Metrics
H-Index
i10 Index
Citation
22
42
12,241
Subash C Sonkar
Diagnostic Research
Public Health
Bioinformatics
STI
Translation Research
Metrics
H-Index
i10 Index
Citation
14
18
860

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Rankings
Ranking Based On Selection: 1
Rajiv Chowdhury
Metrics
H-Index
i10 Index
Citation Counts
83
117
115,321
Epidemiology
Global Public Health
Low and middle income countries
Non-communicable Diseases
COVID-19
Rankings
Ranking Based On Selection: 2
Wasim Maziak
Metrics
H-Index
i10 Index
Citation Counts
68
199
20,719
tobacco control
emerging tobacco products
cardiovascular health
Rankings
Ranking Based On Selection: 3
Jason R Richardson
Metrics
H-Index
i10 Index
Citation Counts
55
106
10,297
Neurotoxicology
environmental neuroscience
Neuroinflammation
Parkinson's Disease
Alzheimer's
Rankings
Ranking Based On Selection: 4
Mary Jo Trepka
Metrics
H-Index
i10 Index
Citation Counts
35
96
4,716
infectious disease epidemiology
social determinants of infectious diseases
Rankings
Ranking Based On Selection: 5
Nasar U Ahmed
Metrics
H-Index
i10 Index
Citation Counts
32
72
3,150
Cancer epidemiology
health disparity
chronic disease risk factors
methods
Rankings
Ranking Based On Selection: 6
Juan P Liuzzi
Metrics
H-Index
i10 Index
Citation Counts
23
28
17,001
Rankings
Ranking Based On Selection: 7
Mohammad Ebrahimi Kalan
Metrics
H-Index
i10 Index
Citation Counts
22
42
12,241
Behavioral Epidemiology
Causal Inference
Health Disparities
Tobacco Control
AI & Health
Rankings
Ranking Based On Selection: 8
Raed Bahelah
Metrics
H-Index
i10 Index
Citation Counts
17
22
1,777
Rankings
Ranking Based On Selection: 9
Subash C Sonkar
Metrics
H-Index
i10 Index
Citation Counts
14
18
860
Diagnostic Research
Public Health
Bioinformatics
STI
Translation Research
Rankings
Ranking Based On Selection: 10
Makella S. Coudray
Metrics
H-Index
i10 Index
Citation Counts
7
5
565
Sexual Health
Sexually Transmitted Infections
Health Disparities

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Rankings
Ranking Based On Selection: 13
Islamiyat Nancy Adebisi
Metrics
H-Index
i10 Index
Citation Counts
1
1
37