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" (901,365 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
Robert W Snow
Malaria
Africa
Metrics
H-Index
i10 Index
Citation
139
432
69,230
* Rankings
Ranking Based On Selection :2
Sammy M. Njenga
Neglected Tropical Diseases (NTDs)
public health
epidemiology
molecular parasitology
Metrics
H-Index
i10 Index
Citation
45
109
6,436
* Rankings
Ranking Based On Selection :3
Maricianah Onono
Epidemiology
Health Systems
Sexual reproductive health
Community Health Systems
Metrics
H-Index
i10 Index
Citation
35
72
3,934
* Rankings
Ranking Based On Selection :4
Luna Kamau
Molecular Biology
Vector Ecology
Insecticide Resistance
Metrics
H-Index
i10 Index
Citation
30
42
5,203
* Rankings
Ranking Based On Selection :11
Collins Okoyo
Mathematical Modeling
Statistical Analysis
Research
Teaching
Geospatial Analysis
Metrics
H-Index
i10 Index
Citation
18
21
866
* Rankings
Ranking Based On Selection :12
Linnet Ongeri
Global Mental Health
Suicide
Psychiatric Epidemiology
Metrics
H-Index
i10 Index
Citation
16
26
1,016
* Rankings
Ranking Based On Selection :13
Geoffrey Murai Maina|Geoffrey M. Maina, Geoffrey Muriithi Maina
HIV
immigrant health
mental health
substance use and addiction
intimate partner violence
Metrics
H-Index
i10 Index
Citation
14
22
685
* Rankings
Ranking Based On Selection :16
Martin Bundi Mwebia
Medical Science
Bacteriology
Biosafety
Biosecurity
Metrics
H-Index
i10 Index
Citation
9
9
242
* Rankings
Ranking Based On Selection :18
Albina Makio
Virology
Immunology
Biochemistry
diagnostic development
Infectious diseases
Metrics
H-Index
i10 Index
Citation
9
9
532
* Rankings
Ranking Based On Selection :21
Merab Odero
women's health
HIV
Gender based Violence
reproductive health
malaria
Metrics
H-Index
i10 Index
Citation
5
5
410
* Rankings
Ranking Based On Selection :22
Kelvin Kering
Medical Microbiology
Microbiome
AMR
Phage therapy
Genomics
Metrics
H-Index
i10 Index
Citation
5
5
277
* Rankings
Ranking Based On Selection :23
Aggrey Gisiora Mokaya
Public Health
Adolescent Health
Global Mental Health
Innovation
Knowledge Translation
Metrics
H-Index
i10 Index
Citation
5
3
102
* Rankings
Ranking Based On Selection :26
Asiko Ongaya
Microbiology
Mycobateriology
TB-HIV coinfection
Immunology
Antimicrobial Resistance
Metrics
H-Index
i10 Index
Citation
4
2
57
* Rankings
Ranking Based On Selection :27
Bridget Kimani
Neglected tropical diseases and Infectious Diseases
Epidemiology
Implementation Science
Public Health
Research Ethics
Metrics
H-Index
i10 Index
Citation
3
3
51
* Rankings
Ranking Based On Selection :29
Fredrick Ogumbo
Diagnostic accuracy
Mycobacteriology
Antimicrobial drug resistance
Virology
Molecular Epidemiology
Metrics
H-Index
i10 Index
Citation
1
1
36
Rankings
Ranking Based On Selection: 1
Robert W Snow
Metrics
H-Index
i10 Index
Citation Counts
139
432
69,230
Rankings
Ranking Based On Selection: 2
Sammy M. Njenga
Metrics
H-Index
i10 Index
Citation Counts
45
109
6,436
Neglected Tropical Diseases (NTDs)
public health
epidemiology
molecular parasitology
Rankings
Ranking Based On Selection: 3
Maricianah Onono
Metrics
H-Index
i10 Index
Citation Counts
35
72
3,934
Epidemiology
Health Systems
Sexual reproductive health
Community Health Systems
Rankings
Ranking Based On Selection: 4
Luna Kamau
Metrics
H-Index
i10 Index
Citation Counts
30
42
5,203
Molecular Biology
Vector Ecology
Insecticide Resistance
Rankings
Ranking Based On Selection: 5
Joseph Mwatha
Metrics
H-Index
i10 Index
Citation Counts
28
37
2,407
Rankings
Ranking Based On Selection: 6
Samoel Ashimosi Khamadi
Metrics
H-Index
i10 Index
Citation Counts
25
50
2,121
Rankings
Ranking Based On Selection: 7
Evans Amukoye
Metrics
H-Index
i10 Index
Citation Counts
21
33
2,069
Rankings
Ranking Based On Selection: 8
Charles Obonyo|Charles O. Obonyo
Metrics
H-Index
i10 Index
Citation Counts
21
25
2,531
Rankings
Ranking Based On Selection: 9
Jeremiah Gathirwa
Metrics
H-Index
i10 Index
Citation Counts
19
24
1,628
Rankings
Ranking Based On Selection: 10
Damaris Matoke-Muhia
Metrics
H-Index
i10 Index
Citation Counts
18
25
3,184
Rankings
Ranking Based On Selection: 11
Collins Okoyo
Metrics
H-Index
i10 Index
Citation Counts
18
21
866
Mathematical Modeling
Statistical Analysis
Research
Teaching
Geospatial Analysis
Rankings
Ranking Based On Selection: 12
Linnet Ongeri
Metrics
H-Index
i10 Index
Citation Counts
16
26
1,016
Global Mental Health
Suicide
Psychiatric Epidemiology
Rankings
Ranking Based On Selection: 13
HIV
immigrant health
mental health
substance use and addiction
intimate partner violence
Rankings
Ranking Based On Selection: 14
Echoka Elizabeth
Metrics
H-Index
i10 Index
Citation Counts
12
14
848
Rankings
Ranking Based On Selection: 15
Lucia Kipkoech Keter
Metrics
H-Index
i10 Index
Citation Counts
10
11
799
Rankings
Ranking Based On Selection: 16
Martin Bundi Mwebia
Metrics
H-Index
i10 Index
Citation Counts
9
9
242
Medical Science
Bacteriology
Biosafety
Biosecurity
Rankings
Ranking Based On Selection: 17
Elses Simiyu
Metrics
H-Index
i10 Index
Citation Counts
9
9
637
Rankings
Ranking Based On Selection: 18
Albina Makio
Metrics
H-Index
i10 Index
Citation Counts
9
9
532
Virology
Immunology
Biochemistry
diagnostic development
Infectious diseases
Rankings
Ranking Based On Selection: 19
Richard Mutisya
Metrics
H-Index
i10 Index
Citation Counts
7
7
313
Rankings
Ranking Based On Selection: 20
Samson Muuo Nzou
Metrics
H-Index
i10 Index
Citation Counts
6
6
186
Rankings
Ranking Based On Selection: 21
Merab Odero
Metrics
H-Index
i10 Index
Citation Counts
5
5
410
women's health
HIV
Gender based Violence
reproductive health
malaria
Rankings
Ranking Based On Selection: 22
Kelvin Kering
Metrics
H-Index
i10 Index
Citation Counts
5
5
277
Medical Microbiology
Microbiome
AMR
Phage therapy
Genomics
Rankings
Ranking Based On Selection: 23
Aggrey Gisiora Mokaya
Metrics
H-Index
i10 Index
Citation Counts
5
3
102
Public Health
Adolescent Health
Global Mental Health
Innovation
Knowledge Translation
Rankings
Ranking Based On Selection: 24
Mary Inziani Matilu
Metrics
H-Index
i10 Index
Citation Counts
4
4
111
Rankings
Ranking Based On Selection: 25
Robert Muhia Karanja
Metrics
H-Index
i10 Index
Citation Counts
4
2
167
Rankings
Ranking Based On Selection: 26
Asiko Ongaya
Metrics
H-Index
i10 Index
Citation Counts
4
2
57
Microbiology
Mycobateriology
TB-HIV coinfection
Immunology
Antimicrobial Resistance
Rankings
Ranking Based On Selection: 27
Bridget Kimani
Metrics
H-Index
i10 Index
Citation Counts
3
3
51
Neglected tropical diseases and Infectious Diseases
Epidemiology
Implementation Science
Public Health
Research Ethics
Rankings
Ranking Based On Selection: 28
Judy Mwai
Metrics
H-Index
i10 Index
Citation Counts
3
1
67
Rankings
Ranking Based On Selection: 29
Fredrick Ogumbo
Metrics
H-Index
i10 Index
Citation Counts
1
1
36
Diagnostic accuracy
Mycobacteriology
Antimicrobial drug resistance
Virology
Molecular Epidemiology