Lebanon's Top 2% Scientists 2023: Career-Long List

Lebanon has 62 scientists on the 2023 career-long Top 2% list, the same number as in 2022. That places Lebanon 61st in the world by number of listed scientists, down 4 places. American University of Beirut has the most listed scientists (29), followed by American University of Beirut Medical Center (9).

Single Year

+1 (+1.4%) vs 2022

Career Data

No change vs 2022

World rank by count

#61

down 4 places vs 2022

Institutes

No change vs 2022

Scientists in Lebanon on the list, by year

The career-long count has grown 29% 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 list2023

Show the list

All 62 scientists

Career-long list2023

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	11,414	ZF Ziyadeh, Fuad N.	Faculty of Medicine	Urology & Nephrology	Rank 114
2	18,429	CA Chamseddine, Ali H.	American University of Beirut	Nuclear & Particle Physics	Rank 253
3	19,287	JR Jabr, Rabih A.	American University of Beirut	Energy	Rank 188
4	27,048	EM Eloubeidi, Mohamad	Faculty of Medicine	Gastroenterology & Hepatology	Rank 427
5	27,210	BW Black, William C.	Dartmouth-Hitchcock Medical Center	Nuclear Medicine & Medical Imaging	Rank 147
6	27,558	HJ Haddad, John J.	Beirut Arab University	Biochemistry & Molecular Biology	Rank 1,244
7	27,756	OC Obermeyer, Carla Makhlouf	American University of Beirut	Public Health	Rank 252
8	41,840	BE Bouri, Elie	Lebanese American University	Finance	Rank 67
9	42,377	BA Baraka, Anis	American University of Beirut	Anesthesiology	Rank 150
10	43,155	FG Fuleihan, Ghada El Hajj	American University of Beirut	Endocrinology & Metabolism	Rank 1,012
11	54,250	MA Mansour, Ahmad M.	American University of Beirut	Ophthalmology & Optometry	Rank 354
12	56,089	TA Taher, Ali T.	American University of Beirut Medical Center	Immunology	Rank 1,665
13	62,766	HM Harajli, Mohamed	American University of Beirut	Civil Engineering	Rank 100
14	63,408	KS Khoury, Samia J.	American University of Beirut Medical Center	Neurology & Neurosurgery	Rank 4,351
15	66,080	DA Dietrich, Arne	American University of Beirut	Experimental Psychology	Rank 803
16	66,096	BA Beydoun, Ahmad	American University of Beirut Medical Center	Neurology & Neurosurgery	Rank 4,525
17	69,879	AB Atiyeh, Bishara S.	American University of Beirut Medical Center	Surgery	Rank 621
18	74,264	DE Demidenko, Eugene	Geisel School of Medicine at Dartmouth	Oncology & Carcinogenesis	Rank 3,060
19	75,610	OI Osman, Ibrahim H.	Suliman S. Olayan School of Business	Operations Research	Rank 271
20	77,429	AH Abu-Saad Huijer, Huda	University of Balamand	Nursing	Rank 121
21	86,076	BK Badr, Kamal F.	American University of Beirut	Urology & Nephrology	Rank 961
22	90,999	HP Henkind, P.	American University of Beirut	Ophthalmology & Optometry	Rank 651
23	102,390	KE Karam, Elie	Saint George Hospital University Medical Center	Psychiatry	Rank 1,804
24	104,117	GH Gali-Muhtasib, Hala	American University of Beirut	Oncology & Carcinogenesis	Rank 4,083
25	105,503	GA Ghauch, Antoine	American University of Beirut	Environmental Sciences	Rank 658
26	106,490	ML Meho, Lokman I.	American University of Beirut	Information & Library Sciences	Rank 62
27	106,608	SM Suidan, Makram T.	American University of Beirut	Environmental Engineering	Rank 491
28	108,798	SA Sibai, Abla M.	American University of Beirut	General & Internal Medicine	Rank 1,410
29	112,388	SS Saab, Samer S.	Lebanese American University	Industrial Engineering & Automation	Rank 839
30	121,658	SA Sharara, Ala	American University of Beirut Medical Center	Gastroenterology & Hepatology	Rank 1,663
31	124,417	AG Araj, George F.	American University of Beirut Medical Center	Microbiology	Rank 3,090
32	136,709	GN Ghaddar, Nesreen	American University of Beirut	Building & Construction	Rank 312
33	153,247	YA Yassine, Ali	American University of Beirut	Design Practice & Management	Rank 84
34	158,656	TR Thomas, Richard	International Center for Agricultural Research in the Dry Areas Syria	Agronomy & Agriculture	Rank 874
35	162,094	HN Hwalla, Nahla	American University of Beirut	Nutrition & Dietetics	Rank 1,055
36	169,611	AJ Assaad, Joseph J.	University of Balamand	Building & Construction	Rank 398
37	179,150	SM Seoud, Mudieddine	American University of Beirut Medical Center	Obstetrics & Reproductive Medicine	Rank 1,750
38	179,614	UI Usta, Ihab M.	American University of Beirut Medical Center	Obstetrics & Reproductive Medicine	Rank 1,755
39	188,113	MM Mawad, Michel E.	Gilbert and Rose-Marie Chagoury School of Medicine	Nuclear Medicine & Medical Imaging	Rank 1,799
40	192,192	BZ Beydoun, Z. R.	American University of Beirut	Energy	Rank 2,645
41	206,580	YG Yared, Ghassan	Université Saint-Joseph de Beyrouth	Dentistry	Rank 1,282
42	219,644	BS Boujaoude, Saouma	American University of Beirut	Education	Rank 1,475
43	236,669	MM Mansour, Mohammad M.	American University of Beirut	Networking & Telecommunications	Rank 2,316
44	237,480	SP Salameh, Pascale	Université Libanaise	General & Internal Medicine	Rank 3,154
45	239,395	AH Artail, Hassan Ali	American University of Beirut	Networking & Telecommunications	Rank 2,351
46	239,749	GK Ghali, Kamel	American University of Beirut	Building & Construction	Rank 605
47	247,952	AC Abou-Rjeily, Chadi	Lebanese American University	Networking & Telecommunications	Rank 2,454
48	250,608	MS Matar, Samir F.	Lebanese German University	Inorganic & Nuclear Chemistry	Rank 1,649
49	256,154	DM Darwish, Marwan	American University of Beirut	Mechanical Engineering & Transports	Rank 1,893
50	262,895	CR Chedid, Riad	American University of Beirut	Energy	Rank 3,807
51	284,485	AB Abboud, Bassam	Université Libanaise	General & Internal Medicine	Rank 3,815
52	292,219	DM Deveci, Muhammet	Lebanese American University	Energy	Rank 4,377
53	296,897	JI Jawhar, Imad	Al Maaref University	Networking & Telecommunications	Rank 2,977
54	301,421	TY Tawk, Youssef	American University of Beirut	Networking & Telecommunications	Rank 3,020
55	341,120	DZ Dawy, Zaher	American University of Beirut	Networking & Telecommunications	Rank 3,481
56	343,462	HH Halpin, Harry	American University of Beirut	Artificial Intelligence & Image Processing	Rank 7,060
57	349,762	HW Habchi, W.	Lebanese American University	Mechanical Engineering & Transports	Rank 2,655
58	357,166	AW Ammar, Walid	Faculté de Médecine	General & Internal Medicine	Rank 4,871
59	368,595	SI Salti, Ibrahim	American University of Beirut Medical Center	General & Internal Medicine	Rank 5,044
60	394,947	AS Adib, Salim M.	American University of Beirut	General & Internal Medicine	Rank 5,426
61	519,160	RM Ramadan, Mohamad	The International University of Beirut	Energy	Rank 8,760
62	556,947	KH Kanaan, Hadi Y.	Université Saint-Joseph de Beyrouth	Electrical & Electronic Engineering	Rank 2,179
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Frequently asked questions

How many scientists from Lebanon are in the 2023 Stanford Top 2% list?

72 scientists affiliated with Lebanon are on the 2023 single-year list, and 62 are on the career-long list.

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

On the 2023 career-long list, American University of Beirut has the most listed scientists from Lebanon, with 29. It is followed by American University of Beirut Medical Center with 9.

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 62 in 2023, a change of +29.2%.

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.