Iran's Top 2% Scientists 2026

Iran has 2,678 scientists on the 2026 single-year Top 2% list, up 5.7% from 2,534 in 2025. That places Iran 17th in the world by number of listed scientists, down 1 place. University of Tehran has the most listed scientists (123), followed by Tehran University of Medical Sciences (112).

Single Year

2,678

+144 (+5.7%) vs 2025

Career Data

1,380

+179 (+14.9%) vs 2025

World rank by count

#17

down 1 place vs 2025

Institutes

442

+24 (+5.7%) vs 2025

Scientists in Iran on the list, by year

The single-year count has more than doubled 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%

2026+5.7%

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%
2026	2,678	+5.7%	1,380	+14.9%

Top 10 institutes in Iran

By number of listed scientists

Single-year list2026

Show the list

All 2,678 scientists

Single-year list2026

Showing the 2026 single-year list. Looking for career rankings? See the career-long list

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	157	SA Sahebkar, Amirhossein	Mashhad University of Medical Sciences	Medicinal & Biomolecular Chemistry	Rank 1
2	405	KA Kaveh, Ali	Iran University of Science and Technology, College of Civil Engineering Tehran	Civil Engineering	Rank 1
3	440	Jafari, Seid Mahdi	Gorgan University of Agricultural Sciences and Natural Resources	Food Science	Rank 5
4	570	Iravani, Siavash	Independent Researcher	Nanoscience & Nanotechnology	Rank 18
5	691	Sheikholeslami, Mohsen	Babol Noshirvani University of Technology	Mechanical Engineering & Transports	Rank 6
6	713	DA Derakhshan, Ali	Golestan University	Languages & Linguistics	Rank 7
7	1,320	GF Gharehchopogh, Farhad Soleimanian	Islamic Azad University	Artificial Intelligence & Image Processing	Rank 88
8	1,425	SM Salavati-Niasari, Masoud	University of Kashan	Materials	Rank 28
9	1,722	HM Hosseinzadeh, Mehdi	Iran University of Medical Sciences	Networking & Telecommunications	Rank 16
10	2,090	AO Akhavan, Omid	Sharif University of Technology	Applied Physics	Rank 54
11	2,363	RN Rezaei, Nima A.	Tehran University of Medical Sciences	Immunology	Rank 46
12	2,375	Mahmoodi, Niyaz Mohammad	Institute for Color Science and Technology	Chemical Engineering	Rank 8
13	2,581	Mirzadeh, Hamed	University of Tehran	Materials	Rank 51
14	2,669	EH Etesami, Hassan	University of Tehran	Agronomy & Agriculture	Rank 20
15	2,780	RJ Rezaee Jordehi, Ahmad	Islamic Azad University, Rasht Branch	Energy	Rank 77
16	3,098	Pourghasemi, Hamid Reza	Shiraz University	Environmental Sciences	Rank 72
17	3,370	Amiri, Sohrab	Baqiyatallah University of Medical Sciences	General & Internal Medicine	Rank 70
18	3,644	MK Mortezaee, Keywan	Kurdistan University of Medical Sciences	Biochemistry & Molecular Biology	Rank 56
19	3,664	AF Azizi, Fereidoun	Shahid Beheshti University of Medical Sciences, Research Institute for Endocrine Science	Endocrinology & Metabolism	Rank 59
20	3,712	SF Salehi, Fakhreddin	Bu-Ali Sina University	Food Science	Rank 25
21	4,060	FF Farzadfar, Farshad	Tehran University of Medical Sciences	General & Internal Medicine	Rank 82
22	4,136	NM Nasrollahzadeh, Mahmoud	University of Qom	Organic Chemistry	Rank 53
23	4,212	DM Dehghan, M.	Amirkabir University of Technology	Numerical & Computational Mathematics	Rank 7
24	4,305	SZ Shariatinia, Zahra	Amirkabir University of Technology	Inorganic & Nuclear Chemistry	Rank 10
25	4,366	MM Mansournia, Mohammad Ali	Tehran University of Medical Sciences	General & Internal Medicine	Rank 88
26	4,479	DG Domairry Ganji, Davood	Babol Noshirvani University of Technology	Mechanical Engineering & Transports	Rank 37
27	4,573	FA Fattah-alhosseini, Arash	Bu-Ali Sina University	Materials	Rank 83
28	4,918	MK Mousavi Khanegah, A.	Hormozgan University of Medical Sciences	Food Science	Rank 36
29	4,947	KR Kelishadi, Roya	Isfahan University of Medical Sciences	General & Internal Medicine	Rank 103
30	5,010	SS Safiri, Saeid	Neurosciences Research Center	General & Internal Medicine	Rank 106
31	5,283	AA Asadi-Pooya, Ali Akbar	Shiraz University of Medical Sciences	Neurology & Neurosurgery	Rank 255
32	5,614	MM Molaei, Mohammad Jafar	Shahrood University of Technology	Materials	Rank 114
33	5,633	AM Aghbashlo, Mortaza	University of Tehran	Energy	Rank 140
34	6,032	TD Toghraie, Davood	Islamic Azad University	Mechanical Engineering & Transports	Rank 49
35	6,209	JA Jouyban, Abolghasem	Pharmaceutical Analysis Research Center	Chemical Engineering	Rank 27
36	6,336	AM Arefi, Mohammad Reza	University of Kashan	Mechanical Engineering & Transports	Rank 50
37	6,583	Abdollahi, Mohammad	Tehran University of Medical Sciences	Pharmacology & Pharmacy	Rank 35
38	7,095	KY Kiani, Yaser	Shahrekord University	Mechanical Engineering & Transports	Rank 61
39	7,137	MH Mirzaei, Hamed Reza	Kashan University of Medical Sciences	Oncology & Carcinogenesis	Rank 200
40	7,232	MA Maleki, Ali	Iran University of Science and Technology	Organic Chemistry	Rank 86
41	7,410	Dehghani, Mohammad Javad	Shiraz University of Technology	Artificial Intelligence & Image Processing	Rank 401
42	7,699	ZS Zinatloo-Ajabshir, Sahar	University of Bonab	Materials	Rank 142
43	7,937	SA Shokri, Aref	Jundi-Shapur Research Institute	Chemical Engineering	Rank 33
44	8,018	MA Montazeri, Ali	Iranian Institute for Health Sciences Research	General & Internal Medicine	Rank 152
45	8,055	AA Askarzadeh, Alireza	Graduate University of Advanced Technology	Energy	Rank 212
46	8,538	SR Saberi-Riseh, Roohallah	Vali-e-Asr University of Rafsanjan	Polymers	Rank 48
47	8,864	ZY Zare, Y.	Iranian Academic Center for Education, Culture and Research	Materials	Rank 166
48	8,937	HA Heidari, Ali Asghar	University of Tehran	Artificial Intelligence & Image Processing	Rank 474
49	9,046	NA Nezamzadeh-Ejhieh, Alireza R.	Islamic Azad University, Shahreza Branch	Chemical Physics	Rank 135
50	9,116	AS Athari, Seyyed Shamsadin	School of Medicine, Zanjan University of Medical Sciences (ZUMS)	General & Internal Medicine	Rank 171
51	9,249	MM Mehrpooya, Mehdi	University of Tehran	Energy	Rank 243
52	9,469	SB Salehi, Bahare	Shahid Beheshti University of Medical Sciences	Biochemistry & Molecular Biology	Rank 138
53	9,768	NH Nassiraei, Hossein	University of Guilan	Civil Engineering	Rank 45
54	9,802	Salari, Nader	Kermanshah University of Medical Sciences	General & Internal Medicine	Rank 177
55	9,880	AA Ashori, Alireza	Iranian Research Organization for Science and Technology	Polymers	Rank 54
56	10,133	MR Malekzadeh, Reza	Tehran University of Medical Sciences	General & Internal Medicine	Rank 187
57	10,311	AS Abbasi, Sajjad	Shiraz University	Environmental Sciences	Rank 225
58	10,402	RB Ramezanzadeh, Bahram	Institute for Color Science and Technology	Polymers	Rank 63
59	10,478	NV Nourani, Vahid	University of Tabriz	Environmental Engineering	Rank 46
60	10,636	SA Sheykhi, Ahmad	Shiraz University	Nuclear & Particle Physics	Rank 129
61	10,837	GM Ghaedi, Mehrorang	Yasouj University	Analytical Chemistry	Rank 40
62	10,989	Sharifi, Alireza	Shahid Beheshti University	Geological & Geomatics Engineering	Rank 117
63	11,196	HF Habibzadeh, Farrokh	Independent Researcher	General & Internal Medicine	Rank 201
64	11,530	AS Azizian, Saeid	Bu-Ali Sina University	Chemical Physics	Rank 167
65	11,764	MA Maleki, Akbar	Shahrood University of Technology	Energy	Rank 307
66	12,123	RM Rezakazemi, Mashallah	Shahrood University of Technology	Chemical Engineering	Rank 64
67	12,316	RB Ramavandi, Bahman	Bushehr University of Medical Sciences	Environmental Sciences	Rank 270
68	12,361	GA Goli, Alireza	University of Isfahan	Artificial Intelligence & Image Processing	Rank 655
69	12,513	VV Vatanpour, Vahid	Kharazmi University	Chemical Engineering	Rank 71
70	12,556	GN Ghadimi, Noradin	Islamic Azad University, Ardabil Branch	Energy	Rank 335
71	12,779	NH Namazi, Hassan	University of Tabriz	Polymers	Rank 80
72	12,899	VJ Varshosaz, Jaleh	Isfahan University of Medical Sciences	Pharmacology & Pharmacy	Rank 65
73	12,943	GA Ghasemi, Asghar	Shahid Beheshti University of Medical Sciences	Endocrinology & Metabolism	Rank 204
74	12,951	Shafik, Wasswa	Yazd University	Artificial Intelligence & Image Processing	Rank 684
75	13,070	GM Ghorbanpour, Mansour	Arak University	Plant Biology & Botany	Rank 167
76	13,108	FR Foroutan, Rauf	University of Tabriz	Chemical Engineering	Rank 77
77	13,460	PS Pirsa, Sajad	Urmia University	Food Science	Rank 134
78	13,467	KM Keshavarz-Ghorabaee, Mehdi	Gonbad Kavous University	Logistics & Transportation	Rank 41
79	13,756	GS Ghafouri-Fard, Soudeh	Shahid Beheshti University of Medical Sciences	Oncology & Carcinogenesis	Rank 407
80	14,108	TA Taleizadeh, A. A.	University of Tehran	Operations Research	Rank 53
81	14,250	AM Alavi, Mehran	University of Kurdistan	Pharmacology & Pharmacy	Rank 72
82	14,279	HK Hajian-Taliki, Karimollah Allah	Babol University of Medical Sciences, Faculty of Medicine	General & Internal Medicine	Rank 249
83	14,289	HS Hassanzadeh-Tabrizi, Sayed Ali	Islamic Azad University, Najafabad Branch	Materials	Rank 266
84	14,545	HE Hemmat Esfe, Mohammad	Semnan University	Mechanical Engineering & Transports	Rank 123
85	14,652	RA Rahdar, Abbas	University of Zabol	Pharmacology & Pharmacy	Rank 78
86	14,676	AM Ala, Moein	Experimental Medicine Research Center	Endocrinology & Metabolism	Rank 235
87	14,716	MO Moradi, Omid	Islamic Azad University, Shahr-e Qods Branch	Nanoscience & Nanotechnology	Rank 484
88	14,823	MS Mallakpour, Sh E.	Isfahan University of Technology	Polymers	Rank 96
89	15,088	AM Afrand, Masoud	Islamic Azad University, Najafabad Branch	Mechanical Engineering & Transports	Rank 128
90	15,114	Heidari, Arash	University of Tehran	Networking & Telecommunications	Rank 154
91	15,176	MA Mohammad Aliha, Mohammad Reza	Iran University of Science and Technology	Mechanical Engineering & Transports	Rank 129
92	15,447	AA Abbasi, Ali Reza	Fasa University	Energy	Rank 418
93	15,656	AZ Asemi, Zatollah	Kashan University of Medical Sciences	Nutrition & Dietetics	Rank 102
94	15,843	HH Hosseinzadeh, Hossein	Mashhad University of Medical Sciences	Medicinal & Biomolecular Chemistry	Rank 51
95	15,867	SA Shahsavar, Amin	Kermanshah University of Technology	Energy	Rank 434
96	15,874	MA Mahvi, Amir Hossein	Tehran University of Medical Sciences	Environmental Sciences	Rank 342
97	15,886	RS Rashidi, Saman	Semnan University	Mechanical Engineering & Transports	Rank 133
98	15,953	NS Nabavi, Seyed Mohammad	Baqiyatallah University of Medical Sciences	Medicinal & Biomolecular Chemistry	Rank 52
99	16,079	NG Najafi, Gholamhassan	Tarbiat Modares University	Energy	Rank 440
100	16,158	Abbasi, Amirali	Farhangian University	Chemical Physics	Rank 242
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Ranks 101 to 2,678The whole list, not only the top 100.

Every year since 2020Single Year and Career Data.

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Countries with a similar count

Single-year list2026

Switzerland3,595 scientists

Sweden2,728 scientists

Saudi Arabia2,686 scientists

Belgium2,182 scientists

Denmark2,138 scientists

Hong Kong2,108 scientists

Explore other countries

Single-year list2026

India6,953 scientists

Pakistan1,034 scientists

Bangladesh347 scientists

Sri Lanka68 scientists

Nepal31 scientists

China37,203 scientists

All countries on the world map

Frequently asked questions

How many scientists from Iran are in the 2026 Stanford Top 2% list?

2,678 scientists affiliated with Iran are on the 2026 single-year list, and 1,380 are on the career-long list.

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

On the 2026 single-year list, University of Tehran has the most listed scientists from Iran, with 123. It is followed by Tehran University of Medical Sciences with 112.

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 2,678 in 2026, a change of +132.1%.

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.