Clinical Trials in Washington
Washington ranks #22 nationally by clinical-trial count, with 205 trials listed, all currently recruiting.
Among trials with a recorded phase, Phase 2 is the largest group at 42 trials.
The top conditions by trial volume are Ovarian Cancer (8), Multiple Myeloma (7), Colorectal Cancer (5).
205
Total Trials
205
Recruiting
#22
National Rank
20
Conditions
Trials by Phase
82
Not Applicable
29
Phase 1 / Phase 2
3
Phase 2 / Phase 3
2
Early Phase 1
21
Phase 1
42
Phase 2
19
Phase 3
7
Phase 4
Top Conditions in Washington
Top Sponsors in Washington
Cities With Most Trials in Washington
| # | City | Trials |
|---|---|---|
| 1 | Seattle | 188 |
| 2 | Spokane | 10 |
| 3 | Tacoma | 8 |
| 4 | Bellevue | 6 |
| 5 | Everett | 5 |
| 6 | Renton | 3 |
| 7 | Vancouver | 2 |
| 8 | Kirkland | 2 |
| 9 | Wenatchee | 2 |
| 10 | Kenmore | 1 |
| 11 | Joint Base Lewis McChord | 1 |
| 12 | Fort Lewis | 1 |
| 13 | Kennewick | 1 |
| 14 | Pasco | 1 |
| 15 | Yakima | 1 |
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
Washington currently has 205 clinical trials actively recruiting participants, making it #22 nationally by total trial count.
The most-studied conditions in Washington are Ovarian Cancer (8 trials), Multiple Myeloma (7 trials), Colorectal Cancer (5 trials).
Browse the conditions listed on this page to find trials recruiting in Washington. 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.