Iran's Top 2% Scientists 2021

Iran has 1,701 scientists on the 2021 single-year Top 2% list, up 47.4% from 1,154 in 2020. That places Iran 18th in the world by number of listed scientists, up 1 place. University of Tehran has the most listed scientists (90), followed by Iran University of Science and Technology (53).

Single Year

1,701

+547 (+47.4%) vs 2020

Career Data

654

+221 (+51.0%) vs 2020

World rank by count

#18

up 1 place vs 2020

Institutes

366

+141 (+62.7%) vs 2020

Scientists in Iran on the list, by year

The single-year count has grown 47% since 2020.

Single-year list, change on the previous year

2021+47.4%

2022+14.2%

2023+10.2%

2024+8.6%

2025+9.0%

Show the numbers

Year	Single Year	Change	Career Data	Change
2020	1,154		433
2021	1,701	+47.4%	654	+51.0%
2022	1,943	+14.2%	742	+13.5%
2023	2,141	+10.2%	871	+17.4%
2024	2,325	+8.6%	1,020	+17.1%
2025	2,534	+9.0%	1,201	+17.7%

Top 10 institutes in Iran

By number of listed scientists

Single-year list2021

Show the list

All 1,701 scientists

Single-year list2021

The first 100 are free to browse.

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Rank in Iran	World rank	Scientist	Institute	Sub-field	Rank in sub-field
1	34	Sheikholeslami, Mohsen	Babol Noshirvani University of Technology	Mechanical Engineering & Transports	Rank 1
2	338	SM Salavati-Niasari, Masoud	University of Kashan	Materials	Rank 7
3	461	SA Sahebkar, Amirhossein	Mashhad University of Medical Sciences	Biochemistry & Molecular Biology	Rank 12
4	883	DM Dehghan, Mehdi	Amirkabir University of Technology	Numerical & Computational Mathematics	Rank 2
5	1,621	AM Afrand, Masoud	Islamic Azad University, Najafabad Branch	Mechanical Engineering & Transports	Rank 22
6	1,676	AO Akhavan, Omid	Sharif University of Technology	Applied Physics	Rank 49
7	1,847	MA Maleki, Ali	Iran University of Science and Technology	Organic Chemistry	Rank 29
8	1,959	AA Askarzadeh, Alireza	Graduate University of Advanced Technology	Energy	Rank 42
9	2,120	KA Kaveh, Ali	Iran University of Science and Technology	Civil Engineering	Rank 4
10	2,205	Jafari, Seid Mahdi	Gorgan University of Agricultural Sciences and Natural Resources	Food Science	Rank 11
11	2,374	KY Kiani, Yaser	Shahrekord University	Mechanical Engineering & Transports	Rank 29
12	2,449	HE Hemmat Esfe, Mohammad	Imam Hossein University	Mechanical Engineering & Transports	Rank 30
13	2,703	GD Ganji, Davoud Domiri	Babol Noshirvani University of Technology	Mechanical Engineering & Transports	Rank 34
14	2,724	NM Nasrollahzadeh, Mahmoud	University of Qom	Organic Chemistry	Rank 38
15	3,185	KA Khataee, Alireza	University of Tabriz	Chemical Engineering	Rank 17
16	3,665	Pourghasemi, Hamid Reza	Shiraz University	Geochemistry & Geophysics	Rank 58
17	3,758	Mahmoodi, Niyaz Mohammad	Institute for Color Science and Technology	Chemical Engineering	Rank 23
18	3,831	GM Ghaedi, Mehrorang	Yasouj University	Organic Chemistry	Rank 58
19	3,845	BE Babaei, Ebrahim	University of Tabriz	Electrical & Electronic Engineering	Rank 10
20	4,255	AF Azizi, Fereidoun	Reproductive Endocrinology Research Center	Endocrinology & Metabolism	Rank 84
21	4,260	RJ Rezaee Jordehi, Ahmad	Islamic Azad University, Rasht Branch	Energy	Rank 85
22	4,755	GN Ghadimi, Noradin	Islamic Azad University, Ardabil Branch	Networking & Telecommunications	Rank 35
23	4,826	MH Mirzaei, Hamed	Kashan University of Medical Sciences and Health Services	Biochemistry & Molecular Biology	Rank 110
24	5,167	NT Niknam, Taher	Shiraz University of Technology	Energy	Rank 99
25	5,305	KA Karimipour, Arash	Islamic Azad University, Najafabad Branch	Mechanical Engineering & Transports	Rank 57
26	5,512	BM Bahiraei, Mehdi	Razi University	Chemical Engineering	Rank 32
27	5,598	TD Toghraie, Davood	Islamic Azad University	Mechanical Engineering & Transports	Rank 60
28	5,791	KR Kelishadi, Roya	Child Growth and Development Research Center, Isfahan UMS	General & Internal Medicine	Rank 91
29	5,796	TA Taleizadeh, Ata Allah	University of Tehran	Operations Research	Rank 26
30	5,963	HH Hosseinzadeh, Hossein	Pharmaceutical Research Center	Medicinal & Biomolecular Chemistry	Rank 14
31	6,039	GB Ghanbari, Behzad	Kermanshah University of Technology	General Physics	Rank 40
32	6,574	RN Rezaei, Nima	Research Center for Immunodeficiencies	Immunology	Rank 172
33	6,611	JA Jouyban, Abolghasem	Pharmaceutical Analysis Research Center	Chemical Engineering	Rank 36
34	6,657	AN Amjady, Nima	Semnan University	Energy	Rank 132
35	6,667	NG Najafi, G.	Tarbiat Modares University	Energy	Rank 133
36	7,174	IS Iravani, Siavash	Isfahan University of Medical Sciences	Organic Chemistry	Rank 103
37	7,322	AS Abbasbandy, S.	Imam Khomeini International University	Numerical & Computational Mathematics	Rank 14
38	7,678	MA Mahvi, Amir Hossein	Tehran University of Medical Sciences	Environmental Sciences	Rank 80
39	7,911	BM Barati, Mohammad Reza	Amirkabir University of Technology	Mechanical Engineering & Transports	Rank 78
40	7,979	MA Montazeri, Ali	Iranian Academic Center for Education, Culture and Research	General & Internal Medicine	Rank 116
41	8,085	VH Veisi, Hojat	Payame Noor University	Organic Chemistry	Rank 122
42	8,090	RB Ramezanzadeh, Bahram	Institute for Color Science and Technology	Polymers	Rank 53
43	8,115	MA Maleki, Akbar	Shahrood University of Technology	Energy	Rank 160
44	8,204	AA Ashori, Alireza	Iranian Research Organization for Science and Technology	Polymers	Rank 56
45	8,238	ZY Zare, Yasser	Iranian Academic Center for Education, Culture and Research	Polymers	Rank 57
46	8,311	SS Shahrokhian, Saeed	Sharif University of Technology	Analytical Chemistry	Rank 30
47	8,572	SA Simchi, Abdolreza	Sharif University of Technology	Materials	Rank 149
48	8,577	SR Shokuhi Rad, Ali	Islamic Azad University	Applied Physics	Rank 174
49	8,609	HM Hatami, Mohammad	Ferdowsi University of Mashhad	Mechanical Engineering & Transports	Rank 87
50	8,683	AM Aliha, M. R.M.	Iran University of Science and Technology	Mechanical Engineering & Transports	Rank 89
51	9,155	AS Azizian, Saeid	Bu-Ali Sina University	Chemical Physics	Rank 180
52	9,341	SZ Shariatinia, Zahra	Amirkabir University of Technology	Inorganic & Nuclear Chemistry	Rank 30
53	9,679	Abdollahi, Mohammad	The Institute of Pharmaceutical Sciences (TIPS)	Medicinal & Biomolecular Chemistry	Rank 23
54	9,856	EF Ebrahimi, Farzad	Imam Khomeini International University	Mechanical Engineering & Transports	Rank 100
55	10,636	AM Aghbashlo, Mortaza	University of Tehran	Energy	Rank 212
56	10,784	MH Mirzadeh, Hamed	University of Tehran	Materials	Rank 180
57	10,833	AM Arefi, Mohammad	University of Kashan	Civil Engineering	Rank 40
58	11,029	NV Nourani, Vahid	University of Tabriz	Environmental Engineering	Rank 57
59	11,147	HK Hajian-Tilaki, Karimollah	Babol University of Medical Sciences	General & Internal Medicine	Rank 153
60	11,471	Karimi-Maleh, Hassan	Quchan University of Technology	Analytical Chemistry	Rank 50
61	11,768	MM Mehrpooya, Mehdi	University of Tehran	Energy	Rank 237
62	11,921	MR Malekzadeh, Reza	Digestive Oncology Research Center	General & Internal Medicine	Rank 162
63	12,550	AR Ansari, R.	University of Guilan	Mechanical Engineering & Transports	Rank 120
64	12,622	JM Jalali, Mohsen	Bu-Ali Sina University	Agronomy & Agriculture	Rank 72
65	12,865	Rafiee, Roham	University of Tehran	Materials	Rank 220
66	13,051	AM Ahmadi, Mohammad H.	Shahrood University of Technology	Energy	Rank 262
67	13,372	EM Eslami, Mostafa	University of Mazandaran	Optics	Rank 63
68	13,388	HA Hafezalkotob, Ashkan	Islamic Azad University, South Tehran Branch	Operations Research	Rank 64
69	13,486	HR Hemmati, Reza	Kermanshah University of Technology	Energy	Rank 270
70	13,872	HA Habibi-Yangjeh, Aziz	University of Mohaghegh Ardabili	Chemical Physics	Rank 269
71	13,896	AP Ahmadi, Pouria	University of Tehran	Energy	Rank 278
72	13,935	MK Mortezaee, Keywan	Kurdistan University of Medical Sciences	Biochemistry & Molecular Biology	Rank 343
73	14,024	RA Rahimpour, Ahmad	Babol Noshirvani University of Technology	Chemical Engineering	Rank 80
74	14,310	EM Esrafili, Mehdi D.	University of Maragheh	Chemical Physics	Rank 282
75	14,348	NA Nezamzadeh-Ejhieh, Alireza	Islamic Azad University, Shahreza Branch	Chemical Physics	Rank 283
76	14,380	MM Miransari, Mohammad	AbtinBerkeh Scientific Ltd. Company	Agronomy & Agriculture	Rank 82
77	14,486	EA Ensafi, Ali A.	Isfahan University of Technology	Analytical Chemistry	Rank 65
78	14,551	SM Shokrieh, M. M.	Iran University of Science and Technology	Materials	Rank 259
79	14,834	OA Oryan, Ahmad	Shiraz University	Veterinary Sciences	Rank 6
80	15,256	MS Madaeni, S. S.	Razi University	Chemical Engineering	Rank 86
81	15,306	AA Alibeigloo, A.	Tarbiat Modares University	Mechanical Engineering & Transports	Rank 141
82	15,401	MB Mohammadi-Ivatloo, Behnam	University of Tabriz	Energy	Rank 304
83	15,403	SH Shokrollahi, Hooman	Shiraz University of Technology	Applied Physics	Rank 314
84	15,409	PM Pouranvari, Majid	Sharif University of Technology	Materials	Rank 272
85	15,464	AZ Asemi, Zatollah	Kashan University of Medical Sciences and Health Services	Nutrition & Dietetics	Rank 104
86	15,486	ZV Zare, V.	Urmia University of Technology	Energy	Rank 306
87	15,497	YM Yari, Mortaza	University of Tabriz	Energy	Rank 307
88	16,013	MP Malekzadeh, Parviz	Persian Gulf University	Mechanical Engineering & Transports	Rank 157
89	16,119	RM Rahimpour, Mohammad Reza	Shiraz University	Chemical Engineering	Rank 90
90	16,554	SJ Shiri, Jalal	University of Tabriz	Environmental Engineering	Rank 77
91	16,588	NA Nazari, Ali	Islamic azad University, Saveh Branch	Materials	Rank 294
92	16,807	AA Afkhami, Abbas	Bu-Ali Sina University	Analytical Chemistry	Rank 77
93	17,201	NM Najafzadeh, Mohammad	Graduate University of Advanced Technology	Environmental Engineering	Rank 82
94	17,232	EH Etesami, Hassan	University of Tehran	Agronomy & Agriculture	Rank 107
95	17,574	NS Nabavi, Seyed Mohammad	Baqiyatallah University of Medical Sciences	Medicinal & Biomolecular Chemistry	Rank 49
96	17,640	FF Farzadfar, Farshad	Non-Communicable Diseases Research Center	General & Internal Medicine	Rank 225
97	17,765	FA Fakhri, Ali	Nano Smart Science Institute	Biophysics	Rank 18
98	18,596	NH Namazi, Hassan	University of Tabriz	Polymers	Rank 153
99	18,629	MT Mohammadi, Toraj	Iran University of Science and Technology	Chemical Engineering	Rank 107
100	18,681	MM Mozafari, Masoud	Iran University of Medical Sciences	Materials	Rank 330
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Countries with a similar count

Single-year list2021

Sweden2,438 scientistsin 2021

Denmark1,795 scientistsin 2021

Belgium1,780 scientistsin 2021

Israel1,514 scientistsin 2021

Taiwan1,358 scientistsin 2021

Hong Kong1,227 scientistsin 2021

Explore other countries

Single-year list2021

India3,352 scientistsin 2021

Pakistan380 scientistsin 2021

Bangladesh97 scientistsin 2021

Sri Lanka24 scientistsin 2021

China16,611 scientistsin 2021

Japan5,416 scientistsin 2021

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Frequently asked questions

How many scientists from Iran are in the 2021 Stanford Top 2% list?

1,701 scientists affiliated with Iran are on the 2021 single-year list, and 654 are on the career-long list.

Which institute in Iran has the most Top 2% scientists?

On the 2021 single-year list, University of Tehran has the most listed scientists from Iran, with 90. It is followed by Iran University of Science and Technology with 53.

How has the number of Top 2% scientists in Iran changed since 2020?

On the single-year list, Iran went from 1,154 scientists in 2020 to 1,701 in 2021, a change of +47.4%.

What is the difference between the single-year and career-long lists?

The single-year list ranks scientists on the citations their work received in one year. The career-long list ranks them on citations across their whole career. Both lists are published every year, and a scientist can be on one, both or neither.

What is the official source of this data?

The rankings come from the science-wide author databases of standardized citation indicators published by Ioannidis et al. in the Elsevier Data Repository, updated every year. TOPSCINET, an independent platform, organises that data by country, year, institute and field, so you can compare and explore it.