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 rankings in world, region, country, and university are in Beta version and are subject to real-time updates, since the subject field “Others” (1,121,289 scientists profile whose branch cannot be determined, not yet edited or determined) is excluded. These rankings will dynamically evolve in real time as the “Others” profiles are revised and classified. Please note that. Subjects indicated as “ * others ” will not be included in the ranking by regions and subjects.

* Rankings
Ranking Based On Selection: 1
Govindarajan M
Mosquito Control
Phytochemistry and Nanotechnology
Mycology and Parasitology
Natural Product
Metrics
 
H-Index
i10 Index
Citation
70
222
14,278
* Rankings
Ranking Based On Selection: 4
Kathiresan Kandasamy
Mangroves
bioprospecting
conservation and managemen
Metrics
 
H-Index
i10 Index
Citation
60
242
21,003
* Rankings
Ranking Based On Selection: 5
Velayutham Murugesan
Heterogenous Catalysis
Photocatalysis
Nanomaterials
Environmental Chemistr
Metrics
 
H-Index
i10 Index
Citation
58
156
16,440
* Rankings
Ranking Based On Selection: 7
Nalini Namasivayam
Cancer Biology
Atherosclerosis
Toxicolog
Metrics
 
H-Index
i10 Index
Citation
54
123
9,362
* Rankings
Ranking Based On Selection: 11
V Ramasamy
Environmental radioactivity
Nanoscience
Luminascenc
Metrics
 
H-Index
i10 Index
Citation
34
76
5,732
* Rankings
Ranking Based On Selection: 12
J Jayabharathi
Electro Chemistry
electroluminescent
Light Emitting Diod
Metrics
 
H-Index
i10 Index
Citation
33
151
4,577
* Rankings
Ranking Based On Selection: 14
Thirugnanasambandam Ramanathan
Marine Plant BIology and Biotechnology - Coastal plants - Mangroves - Biodiversity
Conservation
Ethnopharmacolog
Metrics
 
H-Index
i10 Index
Citation
31
75
3,275
* Rankings
Ranking Based On Selection: 16
Gopi Ragupathi
Plant Physiology
Plant Secondary Metabolites
Genetic Diversity and Conservation of Medicina
Metrics
 
H-Index
i10 Index
Citation
30
45
5,472
* Rankings
Ranking Based On Selection: 19
Ramkumar Thirunavukkarau|T. RAMKUMAR
Environmental Geochemistry
Sedimentology
Hydrogeology
GI
Metrics
 
H-Index
i10 Index
Citation
28
41
1,941
* Rankings
Ranking Based On Selection: 20
Guru Prasad Mohanta
Pharmaceutics
Pharmacy Practice
Rational Use of Medicines
Pharmaceutical Supply Chain Managemen
Metrics
 
H-Index
i10 Index
Citation
27
62
3,361
* Rankings
Ranking Based On Selection: 22
Arumugam Muthuvel
Marine Biology
Marine Natural Products
Marine Drugs
Metrics
 
H-Index
i10 Index
Citation
25
49
2,920
* Rankings
Ranking Based On Selection: 23
H Saleem
molecular physics
DFT Studies
Crystallography
Molecular Dockin
Metrics
 
H-Index
i10 Index
Citation
25
46
2,113
* Rankings
Ranking Based On Selection: 25
AP Sathiyagnanam
Internal Combustion Engines
Alternate fuels and Emission contro
Metrics
 
H-Index
i10 Index
Citation
23
32
2,087
Rankings
Ranking Based On Selection: 1
Govindarajan M
Metrics
 
H-Index
i10 Index
Citation Counts
70
222
14,278
Mosquito Control
Phytochemistry and Nanotechnology
Mycology and Parasitology
Natural Product
Rankings
Ranking Based On Selection: 2
Meenakshisundaram Swaminathan
Metrics
 
H-Index
i10 Index
Citation Counts
64
305
18,973
Rankings
Ranking Based On Selection: 3
Nagini Siddavaram
Metrics
 
H-Index
i10 Index
Citation Counts
62
166
14,042
Rankings
Ranking Based On Selection: 4
Kathiresan Kandasamy
Metrics
 
H-Index
i10 Index
Citation Counts
60
242
21,003
Mangroves
bioprospecting
conservation and managemen
Rankings
Ranking Based On Selection: 5
Velayutham Murugesan
Metrics
 
H-Index
i10 Index
Citation Counts
58
156
16,440
Heterogenous Catalysis
Photocatalysis
Nanomaterials
Environmental Chemistr
Rankings
Ranking Based On Selection: 6
Ponnaian Stanely Mainzen Prince
Metrics
 
H-Index
i10 Index
Citation Counts
57
98
9,919
Rankings
Ranking Based On Selection: 7
Nalini Namasivayam
Metrics
 
H-Index
i10 Index
Citation Counts
54
123
9,362
Rankings
Ranking Based On Selection: 8
Ramesh Kumar Selvaraju
Metrics
 
H-Index
i10 Index
Citation Counts
47
188
11,811
Rankings
Ranking Based On Selection: 9
T Manivasagam
Metrics
 
H-Index
i10 Index
Citation Counts
47
87
5,998
Rankings
Ranking Based On Selection: 10
Manoharan S
Metrics
 
H-Index
i10 Index
Citation Counts
44
134
7,185
Rankings
Ranking Based On Selection: 11
V Ramasamy
Metrics
 
H-Index
i10 Index
Citation Counts
34
76
5,732
Rankings
Ranking Based On Selection: 12
J Jayabharathi
Metrics
 
H-Index
i10 Index
Citation Counts
33
151
4,577
Rankings
Ranking Based On Selection: 13
Perumal Subramanian
Metrics
 
H-Index
i10 Index
Citation Counts
33
90
3,749
Rankings
Ranking Based On Selection: 14
Thirugnanasambandam Ramanathan
Metrics
 
H-Index
i10 Index
Citation Counts
31
75
3,275
Marine Plant BIology and Biotechnology - Coastal plants - Mangroves - Biodiversity
Conservation
Ethnopharmacolog
Rankings
Ranking Based On Selection: 15
K Raghukandan
Metrics
 
H-Index
i10 Index
Citation Counts
31
64
3,620
Rankings
Ranking Based On Selection: 16
Gopi Ragupathi
Metrics
 
H-Index
i10 Index
Citation Counts
30
45
5,472
Plant Physiology
Plant Secondary Metabolites
Genetic Diversity and Conservation of Medicina
Rankings
Ranking Based On Selection: 17
Sellamuthu Manian
Metrics
 
H-Index
i10 Index
Citation Counts
30
68
3,814
Rankings
Ranking Based On Selection: 18
Justin Thenmozhi
Metrics
 
H-Index
i10 Index
Citation Counts
29
38
2,902
Rankings
Ranking Based On Selection: 19
Ramkumar Thirunavukkarau|T. RAMKUMAR
Metrics
 
H-Index
i10 Index
Citation Counts
28
41
1,941
Environmental Geochemistry
Sedimentology
Hydrogeology
GI
Rankings
Ranking Based On Selection: 20
Guru Prasad Mohanta
Metrics
 
H-Index
i10 Index
Citation Counts
27
62
3,361
Pharmaceutics
Pharmacy Practice
Rational Use of Medicines
Pharmaceutical Supply Chain Managemen
Rankings
Ranking Based On Selection: 21
S Subramanian
Metrics
 
H-Index
i10 Index
Citation Counts
26
63
2,909
Rankings
Ranking Based On Selection: 22
Arumugam Muthuvel
Metrics
 
H-Index
i10 Index
Citation Counts
25
49
2,920
Marine Biology
Marine Natural Products
Marine Drugs
Rankings
Ranking Based On Selection: 23
H Saleem
Metrics
 
H-Index
i10 Index
Citation Counts
25
46
2,113
molecular physics
DFT Studies
Crystallography
Molecular Dockin
Rankings
Ranking Based On Selection: 24
Balakrishanan Karthikeyan
Metrics
 
H-Index
i10 Index
Citation Counts
24
45
1,449
Rankings
Ranking Based On Selection: 25
AP Sathiyagnanam
Metrics
 
H-Index
i10 Index
Citation Counts
23
32
2,087
Internal Combustion Engines
Alternate fuels and Emission contro