Iran's Top 2% Scientists 2026: Career-Long List

Iran has 1,380 scientists on the 2026 career-long Top 2% list, up 14.9% from 1,201 in 2025. That places Iran 26th in the world by number of listed scientists. University of Tehran has the most listed scientists (91), followed by Sharif University of Technology (53).

Single Year

2,678

+144 (+5.7%) vs 2025

Career Data

1,380

+179 (+14.9%) vs 2025

World rank by count

#26

No change vs 2025

Institutes

276

+30 (+12.2%) vs 2025

Scientists in Iran on the list, by year

The career-long count has more than tripled 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%

2026+14.9%

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

Career-long list2026

Show the list

All 1,380 scientists

Career-long list2026

Showing the 2026 career-long list. Looking for single-year rankings? See the single-year 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	326	Sheikholeslami, Mohsen	Babol Noshirvani University of Technology	Mechanical Engineering & Transports	Rank 2
2	1,023	SA Sahebkar, Amirhossein	Mashhad University of Medical Sciences	Medicinal & Biomolecular Chemistry	Rank 3
3	1,517	SM Salavati-Niasari, Masoud	University of Kashan	Materials	Rank 23
4	1,913	DM Dehghan, M.	Amirkabir University of Technology	Numerical & Computational Mathematics	Rank 3
5	3,870	KA Kaveh, Ali	Iran University of Science and Technology, College of Civil Engineering Tehran	Civil Engineering	Rank 4
6	3,888	AO Akhavan, Omid	Sharif University of Technology	Applied Physics	Rank 111
7	3,951	Jafari, Seid Mahdi	Gorgan University of Agricultural Sciences and Natural Resources	Food Science	Rank 13
8	4,274	DG Domairry Ganji, Davood	Babol Noshirvani University of Technology	Mechanical Engineering & Transports	Rank 28
9	4,873	Mahmoodi, Niyaz Mohammad	Institute for Color Science and Technology	Chemical Engineering	Rank 17
10	5,088	AF Azizi, Fereidoun	Shahid Beheshti University of Medical Sciences, Research Institute for Endocrine Science	Endocrinology & Metabolism	Rank 145
11	5,887	AS Abbasbandy, Saied	Imam Khomeini International University	Numerical & Computational Mathematics	Rank 4
12	7,965	GM Ghaedi, Mehrorang	Yasouj University	Analytical Chemistry	Rank 36
13	9,374	NT Niknam, Taher	Shiraz University of Technology	Energy	Rank 110
14	10,076	Iravani, Siavash	Independent Researcher	Nanoscience & Nanotechnology	Rank 178
15	10,932	KR Kelishadi, Roya	Isfahan University of Medical Sciences	General & Internal Medicine	Rank 179
16	11,020	MA Maleki, Ali	Iran University of Science and Technology	Organic Chemistry	Rank 227
17	11,056	Montazeri, Ali	Iranian Institute for Health Sciences Research	General & Internal Medicine	Rank 182
18	11,219	NM Nasrollahzadeh, Mahmoud	University of Qom	Organic Chemistry	Rank 233
19	12,708	RN Rezaei, Nima A.	Tehran University of Medical Sciences	Immunology	Rank 435
20	13,384	EA Ensafi, Ail A.	Isfahan University of Technology	Analytical Chemistry	Rank 71
21	14,071	JA Jouyban, Abolghasem	Pharmaceutical Analysis Research Center	Chemical Engineering	Rank 52
22	14,231	Abdollahi, Mohammad	Tehran University of Medical Sciences	Pharmacology & Pharmacy	Rank 91
23	14,638	RJ Rezaee Jordehi, Ahmad	Islamic Azad University, Rasht Branch	Energy	Rank 173
24	14,930	SM Setare, Mohammmadreza	University of Kurdistan	Nuclear & Particle Physics	Rank 199
25	15,359	SS Shahrokhian, Saeed	Sharif University of Technology, Department of Chemistry	Analytical Chemistry	Rank 80
26	15,759	SA Simchi, Abdolreza (Arash)	Sharif University of Technology	Materials	Rank 204
27	15,794	AA Ashori, Alireza	Iranian Research Organization for Science and Technology	Polymers	Rank 126
28	15,838	AM Afrand, Masoud	Islamic Azad University, Najafabad Branch	Mechanical Engineering & Transports	Rank 102
29	16,074	HH Hosseinzadeh, Hossein	Mashhad University of Medical Sciences	Medicinal & Biomolecular Chemistry	Rank 49
30	16,695	KY Kiani, Yaser	Shahrekord University	Mechanical Engineering & Transports	Rank 108
31	16,716	BE Babaei, Ebrahim	University of Tabriz	Electrical & Electronic Engineering	Rank 46
32	17,303	SM Safarinejad, Mohammad Reza	School of Medicine	Urology & Nephrology	Rank 169
33	18,328	Pourghasemi, Hamid Reza	Shiraz University	Environmental Sciences	Rank 130
34	18,882	AA Askarzadeh, Alireza	Graduate University of Advanced Technology	Energy	Rank 224
35	20,905	Mirzadeh, Hamed	University of Tehran	Materials	Rank 264
36	21,260	HE Hemmat Esfe, Mohammad	Semnan University	Mechanical Engineering & Transports	Rank 141
37	21,635	MH Mirzaei, Hamed Reza	Kashan University of Medical Sciences	Oncology & Carcinogenesis	Rank 943
38	22,056	MA Mahvi, Amir Hossein	Tehran University of Medical Sciences	Environmental Sciences	Rank 152
39	22,361	TD Toghraie, Davood	Islamic Azad University	Mechanical Engineering & Transports	Rank 151
40	22,810	ZM Zolfigol, Mohammad Ali	Bu-Ali Sina University	Organic Chemistry	Rank 447
41	22,889	GB Ghanbari, Behzad	Kermanshah University of Technology	General Physics	Rank 127
42	22,962	AS Azizian, Saeid	Bu-Ali Sina University	Chemical Physics	Rank 495
43	24,171	MS Mallakpour, Sh E.	Isfahan University of Technology	Polymers	Rank 195
44	24,614	Ahmadi, Mohammadali	Sharif University of Technology	Energy	Rank 299
45	24,774	MR Malekzadeh, Reza	Tehran University of Medical Sciences	General & Internal Medicine	Rank 371
46	25,361	MS Madaeni, Sayyed Siavash	Razi University	Chemical Engineering	Rank 102
47	25,400	MP Malekzadeh, Parviz	Persian Gulf University	Mechanical Engineering & Transports	Rank 166
48	26,184	AA Afkhami, Abbas	Bu-Ali Sina University	Analytical Chemistry	Rank 150
49	26,902	AS Akhondzadeh, Shahin H.	Tehran University of Medical Sciences	Psychiatry	Rank 628
50	27,107	AA Asadi-Pooya, Ali Akbar	Shiraz University of Medical Sciences	Neurology & Neurosurgery	Rank 1,969
51	27,244	VH Veisi, Hojat	Payame Noor University	Organic Chemistry	Rank 528
52	27,625	JM Jalali, Mohsen	Bu-Ali Sina University	Environmental Sciences	Rank 190
53	27,707	AM Aghbashlo, Mortaza	University of Tehran	Energy	Rank 343
54	27,907	TA Taleizadeh, A. A.	University of Tehran	Operations Research	Rank 92
55	28,811	SA Sheykhi, Ahmad	Shiraz University	Nuclear & Particle Physics	Rank 400
56	29,569	BM Bahiraei, Mehdi	Razi University	Chemical Engineering	Rank 120
57	31,340	VJ Varshosaz, Jaleh	Isfahan University of Medical Sciences	Pharmacology & Pharmacy	Rank 245
58	31,744	HM Hosseinzadeh, Mehdi	Iran University of Medical Sciences	Networking & Telecommunications	Rank 265
59	31,983	HK Hajian-Taliki, Karimollah Allah	Babol University of Medical Sciences, Faculty of Medicine	General & Internal Medicine	Rank 458
60	32,292	GN Ghadimi, Noradin	Islamic Azad University, Ardabil Branch	Energy	Rank 416
61	32,540	SZ Shariatinia, Zahra	Amirkabir University of Technology	Inorganic & Nuclear Chemistry	Rank 172
62	32,668	ZY Zare, Y.	Iranian Academic Center for Education, Culture and Research	Materials	Rank 425
63	33,754	AM Arefi, Mohammad Reza	University of Kashan	Mechanical Engineering & Transports	Rank 223
64	34,369	SM Shokrieh, Mahmood Mehrdad	Iran University of Science and Technology	Materials	Rank 441
65	34,506	Hatami, Mohammad Famil	Esfarayen University of Technology	Mechanical Engineering & Transports	Rank 226
66	34,915	RM Rahimpour, Mohammad Reza	Shiraz University	Chemical Engineering	Rank 142
67	34,995	MK Mortezaee, Keywan	Kurdistan University of Medical Sciences	Biochemistry & Molecular Biology	Rank 1,357
68	35,204	EF Ebrahimi, F. Amir	Imam Khomeini International University	Mechanical Engineering & Transports	Rank 231
69	35,451	KA Khodaei, Amin	University of Tabriz	Energy	Rank 465
70	36,077	MA Morsali, Ali	Tarbiat Modares University	Inorganic & Nuclear Chemistry	Rank 192
71	36,294	MA Mohammad Aliha, Mohammad Reza	Iran University of Science and Technology	Mechanical Engineering & Transports	Rank 239
72	36,512	YM Yari, Mortaza	University of Tabriz	Energy	Rank 485
73	36,751	NG Najafi, Gholamhassan	Tarbiat Modares University	Energy	Rank 489
74	37,197	SA Shaabani, Ahmad	Shahid Beheshti University	Organic Chemistry	Rank 685
75	37,725	HS Hendi, Seyed Hossein	Shiraz University	Nuclear & Particle Physics	Rank 549
76	37,784	NV Nourani, Vahid	University of Tabriz	Environmental Engineering	Rank 142
77	37,950	GA Ghanizadeh, Ahmad	Research Center for Psychiatry and Behavioral Sciences	Psychiatry	Rank 826
78	37,985	EH Etesami, Hassan	University of Tehran	Agronomy & Agriculture	Rank 173
79	39,097	MB Mashhoon, Bahram	Iranian Research Institute for Fundamental Sciences	Nuclear & Particle Physics	Rank 572
80	39,114	MT Mohammadi, Toraj	Iran University of Science and Technology	Chemical Engineering	Rank 162
81	39,418	HA Habibi-Yangjeh, Aziz	University of Mohaghegh Ardabili	Chemical Physics	Rank 797
82	39,459	MM Mehrpooya, Mehdi	University of Tehran	Energy	Rank 516
83	39,909	NA Nazari, Ali H.	Islamic Azad University, Saveh Branch	Materials	Rank 533
84	39,963	AR Ansari, R.	University of Isfahan	Mechanical Engineering & Transports	Rank 263
85	40,291	BM Barati, Mohammad Reza	Amirkabir University of Technology	Mechanical Engineering & Transports	Rank 266
86	40,299	GF Gharehchopogh, Farhad Soleimanian	Islamic Azad University	Artificial Intelligence & Image Processing	Rank 932
87	40,517	SJ Salehi, Jawad A.	Sharif University of Technology	Networking & Telecommunications	Rank 339
88	40,799	SH Shokrollahi, Hooman	Shiraz University of Technology	Applied Physics	Rank 962
89	40,822	AS Alavian, Seyed Moayed	Baqiyatallah University of Medical Sciences	Gastroenterology & Hepatology	Rank 602
90	41,266	FF Farzadfar, Farshad	Tehran University of Medical Sciences	General & Internal Medicine	Rank 562
91	41,872	SM Sheikh-Jabbari, M. M.	Iranian Research Institute for Fundamental Sciences	Nuclear & Particle Physics	Rank 614
92	42,471	MM Miransari, Mohammad	AbtinBerkeh Scientific Ltd. Company	Agronomy & Agriculture	Rank 196
93	44,157	SM Shamsipour, Mojtaba	Razi University	Analytical Chemistry	Rank 282
94	44,862	MM Mirzazadeh, M. A.	University of Guilan	Optics	Rank 169
95	45,002	AA Alibeigloo, A.	Tarbiat Modares University	Mechanical Engineering & Transports	Rank 296
96	45,786	NH Namazi, Hassan	University of Tabriz	Polymers	Rank 399
97	46,425	HY Hatefi, Youssef	School of Medicine	Biochemistry & Molecular Biology	Rank 1,730
98	47,526	DB Davvaz, Bijan	Yazd University	General Mathematics	Rank 192
99	48,029	JH Jafari, Hossein	University of Mazandaran	General Mathematics	Rank 195
100	48,318	AA Alavi, Ali	Ferdowsi University of Mashhad	Chemical Physics	Rank 954
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Every year since 2020Single Year and Career Data.

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Countries with a similar count

Career-long list2026

Austria1,566 scientists

Norway1,557 scientists

Turkey1,479 scientists

Brazil1,304 scientists

Greece1,243 scientists

New Zealand1,224 scientists

Explore other countries

Career-long list2026

India3,898 scientists

Pakistan321 scientists

Bangladesh105 scientists

Sri Lanka39 scientists

China14,583 scientists

Japan9,097 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 career-long list, University of Tehran has the most listed scientists from Iran, with 91. It is followed by Sharif University of Technology with 53.

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 1,380 in 2026, a change of +218.7%.

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.