The results of the 2025 CWTS Leiden Rankings, conducted by the Center for Science and Technology Studies (CWTS) at Leiden University in the Netherlands, have been announced. This year, for the first time, the rankings were published in two separate versions based on different data sources: the Traditional Leiden Ranking, which relies on Web of Science data, and the Leiden Open Edition, which draws on open data sources. While the traditional edition evaluates research impact through citation-based indicators, the Open Edition presents the same indicators using open data platforms such as OpenAlex, enabling a more transparent comparison of institutional research performance.
In the Traditional Leiden Ranking 2025, a total of 1,594 universities were evaluated. Hacettepe University, which ranked 394th worldwide last year, rose to 378th place this year. In this edition, 45 universities from Türkiye were included in the ranking.
In the Leiden Open Edition, published for the first time this year and based on open data sources, 2,831 universities were evaluated. Hacettepe University ranked 396th in this edition, in which 107 universities from Türkiye were included.
Ranking within Türkiye
Among the 45 universities from Türkiye included in the traditional ranking, Hacettepe University ranked 2nd under both counting methods: full counting (equal weight to all publications) and fractional counting (reduced weight for multi-institutional co-authorship). This consistency demonstrates the university’s strong research impact across different calculation models. In addition, Hacettepe University ranked 1st in Türkiye by the number of publications among the top 10% most cited (P(top 10%)).
Scientific impact and publication profile (2020–2023)
According to CWTS Leiden data, Hacettepe University produced 4,494 publications during the 2020–2023 period, 271 of which were among the top 10% most cited globally. The PP(top 10%) ratio was 6.0%, and 41.2% of publications had a citation impact above the world average. These indicators reflect a broad and sustained research culture across the institution.
Field-based evaluation
Hacettepe University’s research impact displays a balanced disciplinary profile. Biomedical and Health Sciences stands out with high publication volume and a strong share of top-tier publications. Life and Earth Sciences, as well as Physical Sciences and Engineering, show above-average citation performance; whereas Mathematics and Computer Science and Social Sciences and Humanities demonstrate steady growth and a broadening research influence. In Social Sciences and Humanities, Hacettepe ranks 477th worldwide and 1st in Türkiye under both counting methods. In Biomedical and Health Sciences, the university ranks 200th worldwide and 2nd in Türkiye, also under both methods.The CWTS Leiden 2025 results confirm that Hacettepe University maintains a sustainable, widespread, and institutionalized research profile, supported by strong scientific output, international visibility, and publication quality.
CWTS Leiden Ranking 2025 (Traditional Edition): Click here for details..
CWTS Leiden Ranking 2025 (Open Edition): Click here for details.