Yemen's Top 2% Scientists 2026: Career-Long List
Yemen has 5 scientists on the 2026 career-long Top 2% list, up 25.0% from 4 in 2025. That places Yemen 114th in the world by number of listed scientists, up 7 places. Higher Institute of Medical Sciences has the most listed scientists (1), followed by Ibb University (1).
Scientists in Yemen on the list, by year
The career-long count has more than tripled since 2020.
Show the numbers
| Year | Single Year | Change | Career Data | Change |
|---|---|---|---|---|
| 2020 | 4 | 1 | ||
| 2021 | 8 | +100.0% | 1 | +0.0% |
| 2022 | 7 | -12.5% | 1 | +0.0% |
| 2023 | 7 | +0.0% | 3 | +200.0% |
| 2024 | 12 | +71.4% | 3 | +0.0% |
| 2025 | 23 | +91.7% | 4 | +33.3% |
| 2026 | 33 | +43.5% | 5 | +25.0% |
Institutes in Yemen
By number of listed scientists
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All 5 scientists
Showing the 2026 career-long list. Looking for single-year rankings? See the single-year list
| Rank in Yemen | World rank | Scientist | Institute | Sub-field | Rank in sub-field |
|---|---|---|---|---|---|
| 1 | 102,800 | Sana'a University | General Mathematics | Rank 537 | |
| 2 | 157,985 | Thamar University | Dentistry | Rank 939 | |
| 3 | 184,246 | Higher Institute of Medical Sciences | Environmental Sciences | Rank 1,641 | |
| 4 | 332,941 | Ibb University | Networking & Telecommunications | Rank 3,442 | |
| 5 | 395,817 | Taiz University | Networking & Telecommunications | Rank 4,174 | |
| No scientists match this filter on the career-long list. Try the single-year list | |||||
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Frequently asked questions
How many scientists from Yemen are in the 2026 Stanford Top 2% list?
33 scientists affiliated with Yemen are on the 2026 single-year list, and 5 are on the career-long list.
Which institute in Yemen has the most Top 2% scientists?
On the 2026 career-long list, Higher Institute of Medical Sciences has the most listed scientists from Yemen, with 1. It is followed by Ibb University with 1.
How has the number of Top 2% scientists in Yemen changed since 2020?
On the career-long list, Yemen went from 1 scientists in 2020 to 5 in 2026, a change of +400.0%.
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.