Clinical Trials in Seoul, 2026
Every study on the ClinicalTrials.gov registry that lists a site in South Korea and is open, about to open, active-but-closed, or enrolling by invitation. Filter it, cite it, and take it away as a file.
About this register
This register is built from ClinicalTrials.gov, the trial registry run by the U.S. National Library of Medicine. It includes every study on the registry that lists at least one investigative site in South Korea and is recruiting, not yet recruiting, active but no longer recruiting, or enrolling by invitation: 3,365 studies in total at the last sync on 11 Oct 2026, 03:17 UTC. The full list can be downloaded as CSV or queried as JSON through the register API.
This page shows the 143 of those studies with a site in Seoul that also match the filters currently applied.
How many clinical trials are recruiting in Seoul?
93 of the 143 studies on this page are recruiting new participants as of the 11 Oct 2026, 03:17 UTC sync. A further 32 have not yet opened recruitment, 15 are active but closed to new participants, and 3 are enrolling by invitation only. Eligibility for any study is decided by its study team.
Summary by phase
| Phase | Studies | Recruiting | Share |
|---|---|---|---|
| Not applicable | 57 | 36 | 39.9% |
| Observational | 39 | 29 | 27.3% |
| Phase 2 | 22 | 14 | 15.4% |
| Phase 4 | 15 | 8 | 10.5% |
| Phase 1/2 | 7 | 5 | 4.9% |
| Phase 3 | 2 | 1 | 1.4% |
| Phase 1 | 1 | 0 | 0.7% |
Most active sponsors
| Lead sponsor | Studies | Recruiting |
|---|---|---|
| Yonsei University | 143 | 93 |