Clinical Trials in Pennsylvania
Pennsylvania ranks #6 nationally by clinical-trial count, with 606 trials listed, all currently recruiting.
Among trials with a recorded phase, Phase 2 is the largest group at 109 trials.
The top conditions by trial volume are Cystic Fibrosis (11), Sickle Cell Disease (9), Duchenne Muscular Dystrophy (8).
606
Total Trials
606
Recruiting
#6
National Rank
20
Conditions
Trials by Phase
265
Not Applicable
59
Phase 1 / Phase 2
13
Phase 2 / Phase 3
7
Early Phase 1
60
Phase 1
109
Phase 2
62
Phase 3
31
Phase 4
Top Conditions in Pennsylvania
Top Sponsors in Pennsylvania
Cities With Most Trials in Pennsylvania
| # | City | Trials |
|---|---|---|
| 1 | Philadelphia | 357 |
| 2 | Pittsburgh | 223 |
| 3 | Hershey | 26 |
| 4 | Erie | 12 |
| 5 | Duncansville | 10 |
| 6 | Allentown | 6 |
| 7 | Lancaster | 6 |
| 8 | Bethlehem | 6 |
| 9 | University Park | 6 |
| 10 | Wynnewood | 4 |
| 11 | Harrisburg | 4 |
| 12 | York | 3 |
| 13 | Easton | 3 |
| 14 | Elkins Park | 3 |
| 15 | DuBois | 3 |
Important: This information is for research purposes only. Always talk to your doctor about whether a clinical trial is right for you.
Frequently Asked Questions
Pennsylvania currently has 606 clinical trials actively recruiting participants, making it #6 nationally by total trial count.
The most-studied conditions in Pennsylvania are Cystic Fibrosis (11 trials), Sickle Cell Disease (9 trials), Duchenne Muscular Dystrophy (8 trials).
Browse the conditions listed on this page to find trials recruiting in Pennsylvania. Each condition page shows trial details, eligibility criteria in plain English, and contact information. Always talk to your doctor about whether a trial is right for you.
Trial counts reflect currently recruiting studies listed on ClinicalTrials.gov with locations in this state.
Source: ClinicalTrials.gov, 2026.