Iran's Top 2% Scientists 2021: Career-Long List

Iran has 654 scientists on the 2021 career-long Top 2% list, up 51.0% from 433 in 2020. That places Iran 33rd in the world by number of listed scientists. University of Tehran has the most listed scientists (49), followed by Sharif University of Technology (38).

Single Year

1,701

+547 (+47.4%) vs 2020

Career Data

654

+221 (+51.0%) vs 2020

World rank by count

#33

No change vs 2020

Institutes

181

+63 (+53.4%) vs 2020

Scientists in Iran on the list, by year

The career-long count has grown 51% since 2020.

Career-long list, change on the previous year

2021+51.0%

2022+13.5%

2023+17.4%

2024+17.1%

2025+17.7%

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

Career-long list2021

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All 654 scientists

Career-long 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	451	Sheikholeslami, Mohsen	Babol Noshirvani University of Technology	Mechanical Engineering & Transports	Rank 5
2	2,395	DM Dehghan, Mehdi	Amirkabir University of Technology	Numerical & Computational Mathematics	Rank 2
3	3,099	SM Salavati-Niasari, Masoud	University of Kashan	Materials	Rank 36
4	5,379	AS Abbasbandy, S.	Imam Khomeini International University	Numerical & Computational Mathematics	Rank 3
5	5,408	AO Akhavan, Omid	Sharif University of Technology	Applied Physics	Rank 140
6	6,542	GD Ganji, Davoud Domiri	Babol Noshirvani University of Technology	Mechanical Engineering & Transports	Rank 35
7	8,848	AF Azizi, Fereidoun	Reproductive Endocrinology Research Center	Endocrinology & Metabolism	Rank 259
8	9,196	SA Sahebkar, Amirhossein	Mashhad University of Medical Sciences	Biochemistry & Molecular Biology	Rank 484
9	11,005	NT Niknam, Taher	Shiraz University of Technology	Energy	Rank 94
10	11,339	GM Ghaedi, Mehrorang	Yasouj University	Organic Chemistry	Rank 243
11	12,250	SM Setare, M. R.	University of Kurdistan	Nuclear & Particle Physics	Rank 190
12	14,265	KA Khataee, Alireza	University of Tabriz	Chemical Engineering	Rank 48
13	15,970	MA Montazeri, Ali	Iranian Academic Center for Education, Culture and Research	General & Internal Medicine	Rank 205
14	16,302	AN Amjady, Nima	Semnan University	Energy	Rank 146
15	17,549	KA Kaveh, A.	Iran University of Science and Technology	Civil Engineering	Rank 18
16	18,395	SM Safarinejad, Mohammad Reza	Clinical Center for Urological Disease Diagnosis and Private Clinic Specializing in Urological and Andrological Genetics	Urology & Nephrology	Rank 199
17	19,286	EA Ensafi, Ali A.	Isfahan University of Technology	Analytical Chemistry	Rank 105
18	19,490	KR Kelishadi, Roya	Child Growth and Development Research Center, Isfahan UMS	General & Internal Medicine	Rank 240
19	22,024	SS Shahrokhian, Saeed	Sharif University of Technology	Analytical Chemistry	Rank 133
20	22,356	SA Simchi, Abdolreza	Sharif University of Technology	Materials	Rank 265
21	22,562	Mahmoodi, Niyaz Mohammad	Institute for Color Science and Technology	Chemical Engineering	Rank 82
22	22,633	ZM Zolfigol, Mohammad Ali	Bu-Ali Sina University	Organic Chemistry	Rank 451
23	23,017	AA Ashori, Alireza	Iranian Research Organization for Science and Technology	Polymers	Rank 212
24	24,503	BE Babaei, Ebrahim	University of Tabriz	Electrical & Electronic Engineering	Rank 57
25	25,495	MS Madaeni, S. S.	Razi University	Chemical Engineering	Rank 94
26	27,129	MP Malekzadeh, Parviz	Persian Gulf University	Mechanical Engineering & Transports	Rank 146
27	29,412	AA Afkhami, Abbas	Bu-Ali Sina University	Analytical Chemistry	Rank 187
28	30,795	Abdollahi, Mohammad	The Institute of Pharmaceutical Sciences (TIPS)	Medicinal & Biomolecular Chemistry	Rank 85
29	31,367	JA Jouyban, Abolghasem	Pharmaceutical Analysis Research Center	Chemical Engineering	Rank 110
30	32,300	HH Hosseinzadeh, Hossein	Pharmaceutical Research Center	Medicinal & Biomolecular Chemistry	Rank 91
31	32,794	MA Maleki, Ali	Iran University of Science and Technology	Organic Chemistry	Rank 639
32	32,915	AA Askarzadeh, Alireza	Graduate University of Advanced Technology	Energy	Rank 333
33	33,259	NM Nasrollahzadeh, Mahmoud	University of Qom	Organic Chemistry	Rank 648
34	33,575	AS Azizian, Saeid	Bu-Ali Sina University	Chemical Physics	Rank 769
35	33,651	Jafari, Seid Mahdi	Gorgan University of Agricultural Sciences and Natural Resources	Food Science	Rank 114
36	34,314	HY Hatefi, Youssef	School of Medicine	Biochemistry & Molecular Biology	Rank 1,552
37	35,193	SJ Salehi, Jawad A.	Sharif University of Technology	Networking & Telecommunications	Rank 283
38	35,704	KY Kiani, Yaser	Shahrekord University	Mechanical Engineering & Transports	Rank 193
39	37,103	MR Malekzadeh, Reza	Digestive Oncology Research Center	General & Internal Medicine	Rank 424
40	39,120	AM Afrand, Masoud	Islamic Azad University, Najafabad Branch	Mechanical Engineering & Transports	Rank 219
41	39,175	SA Shaabani, Ahmad	Shahid Beheshti University	Organic Chemistry	Rank 755
42	40,179	SM Shamsipur, Mojtaba	Razi University	Analytical Chemistry	Rank 273
43	41,047	BS Basti, Shahin Akhondzadeh	Roozbeh Hospital	Psychiatry	Rank 883
44	41,723	MA Mahvi, Amir Hossein	Tehran University of Medical Sciences	Environmental Sciences	Rank 206
45	42,282	JM Jalali, Mohsen	Bu-Ali Sina University	Agronomy & Agriculture	Rank 169
46	43,433	HE Hemmat Esfe, Mohammad	Imam Hossein University	Mechanical Engineering & Transports	Rank 252
47	43,568	MS Mallakpour, Shadpour	Isfahan University of Technology	Polymers	Rank 411
48	43,909	SM Sheikh-Jabbari, M. M.	Iranian Research Institute for Fundamental Sciences	Nuclear & Particle Physics	Rank 737
49	43,999	MT Mohammadi, Toraj	Iran University of Science and Technology	Chemical Engineering	Rank 152
50	47,593	RN Rezaei, Nima	Research Center for Immunodeficiencies	Immunology	Rank 1,477
51	47,594	AS Alavian, Seyed Moayed	Baqiyatallah University of Medical Sciences	Gastroenterology & Hepatology	Rank 724
52	47,629	SA Sheykhi, Ahmad	Shiraz University	Nuclear & Particle Physics	Rank 806
53	49,186	GA Ghanizadeh, Ahmad	Research Center for Psychiatry and Behavioral Sciences	Psychiatry	Rank 1,005
54	50,955	VH Veisi, Hojat	Payame Noor University	Organic Chemistry	Rank 977
55	51,307	VJ Varshosaz, Jaleh	Isfahan University of Medical Sciences	Pharmacology & Pharmacy	Rank 468
56	51,344	SM Shokrieh, M. M.	Iran University of Science and Technology	Materials	Rank 647
57	53,131	DB Davvaz, Bijan	Yazd University	Artificial Intelligence & Image Processing	Rank 868
58	53,191	PS Paria, S.	Amirkabir University of Technology	Chemical Physics	Rank 1,177
59	53,720	SH Shokrollahi, Hooman	Shiraz University of Technology	Applied Physics	Rank 1,372
60	54,024	MA Morsali, Ali	Tarbiat Modares University	Inorganic & Nuclear Chemistry	Rank 363
61	54,698	TA Taleizadeh, Ata Allah	University of Tehran	Operations Research	Rank 168
62	55,450	RJ Rezaee Jordehi, A.	Islamic Azad University, Rasht Branch	Energy	Rank 595
63	55,674	TM Taher, Mohammad A.	Shahid Bahonar University of Kerman	Analytical Chemistry	Rank 368
64	57,460	FJ Faiz, Jawad	University of Tehran	Electrical & Electronic Engineering	Rank 145
65	57,503	HK Hajian-Tilaki, Karimollah	Babol University of Medical Sciences	General & Internal Medicine	Rank 647
66	57,675	HS Hendi, Seyed Hossein	Shiraz University	Nuclear & Particle Physics	Rank 970
67	57,708	RA Rahimpour, Ahmad	Babol Noshirvani University of Technology	Chemical Engineering	Rank 220
68	58,874	Pourghasemi, Hamid Reza	Shiraz University	Geochemistry & Geophysics	Rank 1,013
69	59,457	RM Rahimpour, Mohammad Reza	Shiraz University	Chemical Engineering	Rank 235
70	59,542	AA Alibeigloo, A.	Tarbiat Modares University	Mechanical Engineering & Transports	Rank 352
71	60,532	NA Nazari, Ali	Islamic azad University, Saveh Branch	Materials	Rank 772
72	61,672	HA Habibi-Yangjeh, Aziz	University of Mohaghegh Ardabili	Chemical Physics	Rank 1,341
73	62,248	HM Hatami, Mohammad	Ferdowsi University of Mashhad	Mechanical Engineering & Transports	Rank 365
74	63,044	GM Ganjali, Mohammad Reza	University of Tehran	Analytical Chemistry	Rank 431
75	63,674	NJ Nourooz-Zadeh, Jaffar	Urmia University of Medical Sciences	Biochemistry & Molecular Biology	Rank 2,746
76	63,729	BM Bahiraei, Mehdi	Razi University	Chemical Engineering	Rank 254
77	64,440	MH Mirzadeh, Hamed	University of Tehran	Materials	Rank 830
78	64,465	HM Heravi, Majid M.	Alzahra University	Organic Chemistry	Rank 1,229
79	65,104	YM Yari, Mortaza	University of Tabriz	Energy	Rank 712
80	65,607	MM Miransari, Mohammad	AbtinBerkeh Scientific Ltd. Company	Agronomy & Agriculture	Rank 312
81	65,704	TM Tavazoei, M. S.	Sharif University of Technology	Industrial Engineering & Automation	Rank 479
82	66,892	ZM Zarrindast, Mohammad Reza	Tehran University of Medical Sciences	Neurology & Neurosurgery	Rank 4,596
83	68,504	AR Ansari, R.	University of Guilan	Mechanical Engineering & Transports	Rank 403
84	69,400	MM Momeni, Mohamad Mohsen	Isfahan University of Technology	Applied Physics	Rank 1,801
85	69,710	BM Barati, Mohammad Reza	Amirkabir University of Technology	Mechanical Engineering & Transports	Rank 411
86	71,677	GA Ghasemi, Ali	Malek Ashtar University of Technology	Applied Physics	Rank 1,863
87	71,754	EM Eslami, Mostafa	University of Mazandaran	Optics	Rank 273
88	73,026	MM Mirmiran, Majid	University of Isfahan	Neurology & Neurosurgery	Rank 4,949
89	73,068	ZM Zohuriaan-Mehr, Mohammad Jalal	Iran Polymer and Petrochemical Institute	Polymers	Rank 675
90	73,478	EF Ebrahimi, Farzad	Imam Khomeini International University	Mechanical Engineering & Transports	Rank 450
91	74,296	NG Najafi, G.	Tarbiat Modares University	Energy	Rank 831
92	74,425	RB Rezaei, B.	Isfahan University of Technology	Analytical Chemistry	Rank 524
93	74,826	GN Ghadimi, Noradin	Islamic Azad University, Ardabil Branch	Networking & Telecommunications	Rank 641
94	75,185	KM Keshavarz, Mohammad Hossein	Malek Ashtar University of Technology	Chemical Physics	Rank 1,582
95	75,413	FM Fotuhi-Firuzabad, Mahmud	Sharif University of Technology	Energy	Rank 847
96	75,439	KK Kiani, Keivan	K. N. Toosi University of Technology	Mechanical Engineering & Transports	Rank 462
97	76,681	SF Shemirani, Farzaneh	University of Tehran	Analytical Chemistry	Rank 542
98	76,692	HM Hosseini-Sarvari, Mona	Shiraz University	Organic Chemistry	Rank 1,423
99	76,872	MM Mirzazadeh, M.	University of Guilan	Optics	Rank 292
100	77,084	MH Mirzaei, Hamed	Kashan University of Medical Sciences and Health Services	Biochemistry & Molecular Biology	Rank 3,287
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Countries with a similar count

Career-long list2021

Brazil812 scientistsin 2021

South Africa669 scientistsin 2021

Ireland661 scientistsin 2021

Portugal481 scientistsin 2021

Saudi Arabia443 scientistsin 2021

Czech Republic428 scientistsin 2021

Explore other countries

Career-long list2021

India2,042 scientistsin 2021

Pakistan127 scientistsin 2021

Bangladesh40 scientistsin 2021

Japan7,362 scientistsin 2021

China6,943 scientistsin 2021

Israel1,870 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 career-long list, University of Tehran has the most listed scientists from Iran, with 49. It is followed by Sharif University of Technology with 38.

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

On the career-long list, Iran went from 433 scientists in 2020 to 654 in 2021, a change of +51.0%.

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.