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

Bulgaria has 79 scientists on the 2023 career-long Top 2% list, up 3.9% from 76 in 2022. That places Bulgaria 54th in the world by number of listed scientists, down 3 places. Sofia University St. Kliment Ohridski has the most listed scientists (15), followed by Institute of Physical Chemistry Bulgarian Academy of Sciences (7).

Single Year
58
+3 (+5.5%) vs 2022
Career Data
79
+3 (+3.9%) vs 2022
World rank by count
#54
down 3 places vs 2022
Institutes
34
No change vs 2022

Scientists in Bulgaria on the list, by year

The career-long count has grown 58% since 2020.

Career-long list, change on the previous year
2021+46.0%
2022+4.1%
2023+3.9%
2024+10.1%
2025+4.6%
Show the numbers
YearSingle YearChangeCareer DataChange
20203550
202148+37.1%73+46.0%
202255+14.6%76+4.1%
202358+5.5%79+3.9%
202470+20.7%87+10.1%
202563-10.0%91+4.6%

Top 10 institutes in Bulgaria

By number of listed scientists

Career-long list2023
Show the list
  1. 1Sofia University St. Kliment Ohridski15
  2. 2Institute of Physical Chemistry Bulgarian Academy of Sciences7
  3. 3The Bulgarian Academy of Sciences6
  4. 4University of Chemical Technology and Metallurgy Sofia5
  5. 5Institute of Catalysis Bulgarian Academy of Sciences4
  6. 6Medical University of Sofia4
  7. 7Institute of General and Inorganic Chemistry Bulgarian Academy of Sciences3
  8. 8Institute of Mechanics Bulgarian Academy of Sciences3
  9. 9Institute of Microbiology Bulgarian Academy of Sciences3
  10. 10Institute of Biophysics and Biomedical Engineering, Bulgarian Academy of Sciences2

All 79 scientists

Career-long list2023

Everyone on the list, free to browse.

Rank in Bulgaria World rank Scientist Institute Sub-field Rank in sub-field
1 5,771 Institute of Biophysics and Biomedical Engineering, Bulgarian Academy of Sciences Artificial Intelligence & Image Processing Rank 123
2 13,525 Institute of General and Inorganic Chemistry Bulgarian Academy of Sciences Physical Chemistry Rank 51
3 21,969 Institute of Organic Chemistry with Centre of Phytochemistry (IOCCP) Bulgarian Academy of Sciences Medicinal & Biomolecular Chemistry Rank 62
4 29,621 Sofia University St. Kliment Ohridski Chemical Physics Rank 662
5 31,453 Institute of Physical Chemistry Bulgarian Academy of Sciences Chemical Physics Rank 709
6 37,802 Sofia University St. Kliment Ohridski Applied Physics Rank 971
7 39,441 Medical University of Sofia Medicinal & Biomolecular Chemistry Rank 111
8 40,521 Sofia University St. Kliment Ohridski General Physics Rank 247
9 45,506 The Bulgarian Academy of Sciences Energy Rank 524
10 50,452 Sofia University St. Kliment Ohridski Chemical Physics Rank 1,058
11 55,686 Bulgarian Academy of Sciences, Institute of Mineralogy and Crystallography “Acad. Ivan Kostov” Energy Rank 661
12 64,851 Institute of Physical Chemistry Bulgarian Academy of Sciences Chemical Physics Rank 1,334
13 83,171 Sofia University St. Kliment Ohridski Optoelectronics & Photonics Rank 301
14 83,681 Institute of Mathematics and Informatics Bulgarian Academy of Sciences Nuclear & Particle Physics Rank 1,341
15 84,481 University of Chemical Technology and Metallurgy Sofia Energy Rank 1,066
16 86,374 Sofia University St. Kliment Ohridski Chemical Physics Rank 1,673
17 92,312 Sofia University St. Kliment Ohridski Chemical Physics Rank 1,782
18 94,268 University of Chemical Technology and Metallurgy Sofia Applied Physics Rank 2,523
19 97,117 Sofia University St. Kliment Ohridski Chemical Physics Rank 1,873
20 112,309 The Bulgarian Academy of Sciences Applied Physics Rank 3,062
21 117,388 Institute of Catalysis Bulgarian Academy of Sciences Physical Chemistry Rank 418
22 117,650 Bourgas Prof. Assen Zlatarov University Medicinal & Biomolecular Chemistry Rank 404
23 118,845 Sofia University St. Kliment Ohridski Organic Chemistry Rank 2,108
24 126,084 University of Chemical Technology and Metallurgy Sofia Energy Rank 1,623
25 126,157 Institute of Plant Physiology and Genetics Plant Biology & Botany Rank 1,798
26 136,041 The Bulgarian Academy of Sciences Energy Rank 1,788
27 139,597 University of Chemical Technology and Metallurgy Sofia Organic Chemistry Rank 2,476
28 145,574 Medical University of Sofia Medicinal & Biomolecular Chemistry Rank 528
29 146,338 Institute of Microbiology Bulgarian Academy of Sciences Biotechnology Rank 444
30 149,502 Sofia University St. Kliment Ohridski Analytical Chemistry Rank 1,154
31 149,922 Institute of Mechanics Bulgarian Academy of Sciences Mechanical Engineering & Transports Rank 1,053
32 153,858 Medical University of Sofia Microbiology Rank 3,735
33 157,342 Sofia University St. Kliment Ohridski Organic Chemistry Rank 2,770
34 164,271 Institute of Electronics Bulgarian Academy of Sciences Organic Chemistry Rank 2,877
35 166,739 Medical University of Plovdiv Toxicology Rank 785
36 167,628 Medical University of Sofia Biophysics Rank 269
37 178,276 Institute of Biophysics and Biomedical Engineering, Bulgarian Academy of Sciences Biomedical Engineering Rank 770
38 178,584 Institute of Mathematics and Informatics Bulgarian Academy of Sciences General Mathematics Rank 1,140
39 184,855 Konstantin Preslavsky University of Shumen Chemical Engineering Rank 910
40 186,648 Institute of Mechanics Bulgarian Academy of Sciences Fluids & Plasmas Rank 1,572
41 187,792 The Bulgarian Academy of Sciences Applied Physics Rank 5,322
42 194,031 Institute for Nuclear Research and Nuclear Energy Bulgarian Academy of Sciences Nuclear & Particle Physics Rank 3,142
43 197,264 Institute of Catalysis Bulgarian Academy of Sciences Inorganic & Nuclear Chemistry Rank 1,272
44 199,083 University of Chemical Technology and Metallurgy Sofia Materials Rank 2,766
45 201,106 Institute of Mechanics Bulgarian Academy of Sciences Biomedical Engineering Rank 863
46 201,268 Institute of Catalysis Bulgarian Academy of Sciences Physical Chemistry Rank 739
47 205,577 Trakia University Faculty of Veterinary Medicine Toxicology Rank 1,012
48 210,094 Institute of Catalysis Bulgarian Academy of Sciences Physical Chemistry Rank 773
49 218,824 Institute of Physical Chemistry Bulgarian Academy of Sciences Applied Physics Rank 6,230
50 232,711 Institute of Biodiversity and Ecosystem Research at the Bulgarian Academy of Sciences Plant Biology & Botany Rank 3,399
51 235,150 Technical University of Gabrovo Mechanical Engineering & Transports Rank 1,723
52 242,692 Institute of Physical Chemistry Bulgarian Academy of Sciences Energy Rank 3,473
53 245,657 Sofia University St. Kliment Ohridski Analytical Chemistry Rank 2,108
54 248,460 Sofia University St. Kliment Ohridski Environmental Sciences Rank 1,868
55 252,117 Institute of Polymers Bulgarian Academy of Sciences Polymers Rank 2,287
56 253,507 Roumen Tsanev Institute of Molecular Biology, Bulgarian Academy of Sciences Inorganic & Nuclear Chemistry Rank 1,663
57 260,790 Institute of Microbiology Bulgarian Academy of Sciences Medicinal & Biomolecular Chemistry Rank 1,173
58 260,981 Georgi Nadjakov Institute of Solid State Physics Bulgarian Academy of Sciences Optoelectronics & Photonics Rank 1,219
59 261,750 Trakia University General & Internal Medicine Rank 3,484
60 262,991 Institute of Physical Chemistry Bulgarian Academy of Sciences Materials Rank 3,801
61 267,935 Institute of Physical Chemistry Bulgarian Academy of Sciences Energy Rank 3,908
62 275,353 Institute of Organic Chemistry with Centre of Phytochemistry (IOCCP) Bulgarian Academy of Sciences Analytical Chemistry Rank 2,395
63 280,599 Onkoderma-Clinic for Dermatology Dentistry Rank 1,840
64 287,078 Technical University of Sofia Artificial Intelligence & Image Processing Rank 5,799
65 299,693 Institute of General and Inorganic Chemistry Bulgarian Academy of Sciences Materials Rank 4,449
66 339,579 Institute of Physical Chemistry Bulgarian Academy of Sciences Energy Rank 5,256
67 343,765 Institute of General and Inorganic Chemistry Bulgarian Academy of Sciences Energy Rank 5,327
68 346,756 Sofia University St. Kliment Ohridski Artificial Intelligence & Image Processing Rank 7,145
69 349,818 The Bulgarian Academy of Sciences Energy Rank 5,457
70 431,376 Paisii Hilendarski University of Plovdiv Materials Rank 6,784
71 450,073 University of Mining and Geology St. Ivan Rilski Mining & Metallurgy Rank 249
72 455,642 London School of Hygiene & Tropical Medicine General & Internal Medicine Rank 6,364
73 455,730 The Bulgarian Academy of Sciences Optoelectronics & Photonics Rank 2,416
74 462,845 Institute of Microbiology Bulgarian Academy of Sciences Biotechnology Rank 1,830
75 492,783 Institute of Information and Communication Technologies, Bulgarian Academy of Sciences Artificial Intelligence & Image Processing Rank 10,575
76 512,432 University of Mining and Geology St. Ivan Rilski Mining & Metallurgy Rank 302
77 533,416 University of Architecture, Civil Engineering and Geodesy Materials Rank 8,803
78 608,190 Sofia University St. Kliment Ohridski Mining & Metallurgy Rank 401
79 635,617 Space Research and Technology Institute Aerospace & Aeronautics Rank 1,517
Showing 1 to 79 of 79

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Frequently asked questions

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

58 scientists affiliated with Bulgaria are on the 2023 single-year list, and 79 are on the career-long list.

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

On the 2023 career-long list, Sofia University St. Kliment Ohridski has the most listed scientists from Bulgaria, with 15. It is followed by Institute of Physical Chemistry Bulgarian Academy of Sciences with 7.

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

On the career-long list, Bulgaria went from 50 scientists in 2020 to 79 in 2023, a change of +58.0%.

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.