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

Lebanon has 59 scientists on the 2021 career-long Top 2% list, up 22.9% from 48 in 2020. That places Lebanon 57th in the world by number of listed scientists, down 4 places. American University of Beirut has the most listed scientists (33), followed by American University of Beirut Medical Center (6).

Single Year

+11 (+19.6%) vs 2020

Career Data

+11 (+22.9%) vs 2020

World rank by count

#57

down 4 places vs 2020

Institutes

+5 (+41.7%) vs 2020

Scientists in Lebanon on the list, by year

The career-long count has grown 23% since 2020.

Career-long list, change on the previous year

2021+22.9%

2022+5.1%

2023+0.0%

2024+25.8%

2025+17.9%

Show the numbers

Year	Single Year	Change	Career Data	Change
2020	56		48
2021	67	+19.6%	59	+22.9%
2022	71	+6.0%	62	+5.1%
2023	72	+1.4%	62	+0.0%
2024	105	+45.8%	78	+25.8%
2025	98	-6.7%	92	+17.9%

Top 10 institutes in Lebanon

By number of listed scientists

Career-long list2021

Show the list

All 59 scientists

Career-long list2021

Everyone on the list, free to browse.

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Rank in Lebanon	World rank	Scientist	Institute	Sub-field	Rank in sub-field
1	10,015	ZF Ziyadeh, Fuad N.	American University of Beirut	Urology & Nephrology	Rank 96
2	17,135	CA Chamseddine, Ali H.	American University of Beirut	Nuclear & Particle Physics	Rank 256
3	21,579	JR Jabr, Rabih A.	American University of Beirut	Energy	Rank 202
4	24,014	AR Asmar, Roland	Foundation-Medical Research Institutes	Cardiovascular System & Hematology	Rank 1,029
5	25,385	JD Jamali, Dima	Suliman S. Olayan School of Business	Business & Management	Rank 228
6	25,514	HJ Haddad, John J.	Beirut Arab University	Biochemistry & Molecular Biology	Rank 1,208
7	30,208	OC Obermeyer, Carla Makhlouf	American University of Beirut	Public Health	Rank 270
8	41,049	BA Baraka, Anis	American University of Beirut	Anesthesiology	Rank 140
9	45,582	EF El-Hajj Fuleihan, Ghada	American University of Beirut Medical Center	Endocrinology & Metabolism	Rank 1,061
10	54,358	MA Mansour, Ahmad M.	American University of Beirut	Ophthalmology & Optometry	Rank 345
11	63,663	TA Taher, Ali	American University of Beirut Medical Center	Immunology	Rank 1,898
12	64,859	BA Beydoun, Ahmad	American University of Beirut Medical Center	Neurology & Neurosurgery	Rank 4,463
13	65,455	AE Akl, Elie A.	American University of Beirut	General & Internal Medicine	Rank 725
14	69,196	HM Harajli, Mohamad	American University of Beirut	Civil Engineering	Rank 106
15	69,654	AB Atiyeh, Bishara S.	American University of Beirut Medical Center	Surgery	Rank 622
16	69,953	OI Osman, Ibrahim H.	Suliman S. Olayan School of Business	Operations Research	Rank 255
17	70,742	DA Dietrich, Arne	American University of Beirut	Experimental Psychology	Rank 841
18	71,232	EM El-Fadel, Mutasem	American University of Beirut	Environmental Sciences	Rank 383
19	73,395	KJ Khatib, Jamal M.	Beirut Arab University	Building & Construction	Rank 126
20	73,640	SA Shihadeh, Alan	American University of Beirut	Public Health	Rank 653
21	76,447	AH Abu-Saad Huijer, Huda	American University of Beirut	Nursing	Rank 153
22	77,163	BK Badr, Kamal	American University of Beirut	Urology & Nephrology	Rank 865
23	89,288	HP Henkind, P.	American University of Beirut	Ophthalmology & Optometry	Rank 633
24	90,228	RD Roberts, David W.	Dartmouth-Hitchcock Medical Center	Neurology & Neurosurgery	Rank 5,918
25	93,457	BE Bouri, Elie	Adnan Kassar School of Business	Finance	Rank 156
26	94,156	SM Suidan, Makram T.	American University of Beirut	Environmental Engineering	Rank 409
27	105,187	GH Gali-Muhtasib, Hala	American University of Beirut	Oncology & Carcinogenesis	Rank 4,140
28	107,364	KE Karam, Elie G.	Saint George Hospital University Medical Center	Psychiatry	Rank 1,915
29	109,695	SS Saab, Samer S.	Lebanese American University	Industrial Engineering & Automation	Rank 810
30	109,954	GA Ghauch, Antoine	American University of Beirut	Environmental Sciences	Rank 640
31	122,637	SA Sibai, Abla M.	American University of Beirut	General & Internal Medicine	Rank 1,325
32	123,467	AG Araj, George F.	American University of Beirut Medical Center	Microbiology	Rank 3,039
33	125,986	ML Meho, L.	American University of Beirut	Information & Library Sciences	Rank 67
34	133,534	SA Sharara, Ala I.	American University of Beirut Medical Center	Gastroenterology & Hepatology	Rank 1,791
35	138,526	PD Patra, Digambara	American University of Beirut	Analytical Chemistry	Rank 1,075
36	139,312	GN Ghaddar, Nesreen	American University of Beirut	Building & Construction	Rank 272
37	151,588	KL Karam, Lina J.	Lebanese American University	Artificial Intelligence & Image Processing	Rank 2,453
38	152,503	YA Yassine, Ali	American University of Beirut	Design Practice & Management	Rank 87
39	156,070	AM Al-Alaoui, Mohamad Adnan	American University of Beirut	Electrical & Electronic Engineering	Rank 459
40	170,200	MM Mawad, Michel	Gilbert and Rose-Marie Chagoury School of Medicine	Nuclear Medicine & Medical Imaging	Rank 1,648
41	179,080	BZ Beydoun, Z. R.	American University of Beirut	Energy	Rank 2,260
42	204,017	YG Yared, Ghassan	Malik Torossian Bldg	Dentistry	Rank 1,291
43	217,429	AJ Assaad, Joseph J.	University of Balamand	Building & Construction	Rank 471
44	221,525	BS BouJaoude, Saouma	American University of Beirut	Education	Rank 1,340
45	235,818	MM Mansour, Mohammad M.	American University of Beirut	Networking & Telecommunications	Rank 2,281
46	236,018	RK Rebeiz, Karim	Phoenicia University	Building & Construction	Rank 515
47	237,953	AH Artail, Hassan Ali	American University of Beirut	Networking & Telecommunications	Rank 2,295
48	239,423	DM Darwish, M.	American University of Beirut	Mechanical Engineering & Transports	Rank 1,694
49	249,663	CR Chedid, Riad	American University of Beirut	Energy	Rank 3,293
50	253,622	MS Matar, Samir F.	Lebanese German University	Inorganic & Nuclear Chemistry	Rank 1,872
51	255,920	GK Ghali, Kamel	American University of Beirut	Building & Construction	Rank 562
52	265,708	AC Abou-Rjeily, Chadi	Lebanese American University	Networking & Telecommunications	Rank 2,599
53	283,567	AB Abboud, Bassam	Université Libanaise	General & Internal Medicine	Rank 3,155
54	322,111	JI Jawhar, Imad	Al Maaref University	Networking & Telecommunications	Rank 3,214
55	359,045	SI Salti, Ibrahim	American University of Beirut	General & Internal Medicine	Rank 4,042
56	360,472	SP Salameh, Pascale	Université Libanaise	General & Internal Medicine	Rank 4,060
57	364,019	DZ Dawy, Zaher	American University of Beirut	Networking & Telecommunications	Rank 3,730
58	397,621	AS Adib, S.	American University of Beirut	General & Internal Medicine	Rank 4,538
59	527,716	KH Kanaan, Hadi Y.	Université Saint-Joseph de Beyrouth	Electrical & Electronic Engineering	Rank 2,059
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Frequently asked questions

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

67 scientists affiliated with Lebanon are on the 2021 single-year list, and 59 are on the career-long list.

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

On the 2021 career-long list, American University of Beirut has the most listed scientists from Lebanon, with 33. It is followed by American University of Beirut Medical Center with 6.

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

On the career-long list, Lebanon went from 48 scientists in 2020 to 59 in 2021, a change of +22.9%.

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.