Universities by Research i10-index in Bulgaria
Universities and colleges ranked by OpenAlex's institutional i10-index, the number of works with at least ten citations. This is a research metric, not a measure of teaching quality. OpenAlex is an open scholarly index; larger and older institutions tend to have more indexed research.
1Sofia University "St. Kliment Ohridski"32,818 works
23,206
2Medical University of Sofia12,979 works
7,961
3Medical University Plovdiv6,972 works
3,271
4Plovdiv University6,898 works
2,758
5Technical University of Sofia12,515 works
2,479
6University of Chemical Technology and Metallurgy3,969 works
2,269
7Trakia University5,722 works
1,968
8Medical University of Varna7,909 works
1,957
9University of Food Technologies2,281 works
1,433
10Prof. Assen Zlatarov University2,007 works
1,161
11Angel Kanchev University of Ruse4,548 works
1,011
12National Center of Infectious and Parasitic Diseases1,153 works
1,004
13Medical University Pleven2,821 works
763
14University of Forestry2,449 works
631
15South-West University "Neofit Rilski"2,888 works
507
16Agricultural University Plovdiv2,008 works
502
17Technical University of Varna2,665 works
440
18Technical University of Gabrovo1,329 works
424
19Shumen University2,230 works
421
20New Bulgarian University2,371 works
419
21University of Architecture, Civil Engineering and Geodesy1,881 works
287
22University of Mining and Geology "Saint Ivan Rilski"1,060 works
269
23University of National and World Economy3,502 works
255
24Varna University of Management401 works
180
25Vasil Levski National Military University1,282 works
149
26Nikola Vaptsarov Naval Academy737 works
147
27University of Library Studies and Information Technologies1,029 works
140
28American University in Bulgaria699 works
133
29Institute of Mineralogy and Crystallography "Acad. Ivan Kostov" Bulgarian Academy of Sciences328 works
132
30St. Cyril and St. Methodius University of Veliko Tarnovo1,561 works
120
31University of Economics Varna1,637 works
119
32University of Telecommunications and Post407 works
93
33Plant Protection Institute161 works
92
34D. A. Tsenov Academy of Economics750 works
83
35National Sports Academy Vassil Levski1,028 works
81
36Burgas Free University643 works
64
37Big Data for Smart Society (GATE) Institute221 works
62
38Todor Kableshkov University of Transport574 works
59
39Food Research and Development Institute81 works
37
40Varna Free University472 works
37
41G. S. Rakovski National Defence College1,037 works
29
42University of Agribusiness and Rural Development672 works
26
43University of Security and Economics156 works
24
44European Polytechnical University81 works
11
45Institute for Bulgarian Language560 works
11
46University of Structural Engineering and Architecture Lyuben Karavelov139 works
10
47International Business School89 works
9
48University of Finance, Business and Entrepreneurship176 works
9
49Bulgarian Air Force Academy127 works
7
50National Academy of Arts58 works
5
Highlights
Within Bulgaria, Sofia University "St. Kliment Ohridski" ranks first in 2026 with 23,206, followed by Medical University of Sofia (7,961) and Medical University Plovdiv (3,271).
Sofia University "St. Kliment Ohridski" is 2.9 times higher than Medical University of Sofia, the runner-up.
Across 50 entries, values run from 23,206 (Sofia University "St. Kliment Ohridski") to 5 (National Academy of Arts), with a median of 148.
Source: OpenAlex, institutional Research i10-index, 2026. Unit: i10-index.
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