Clinical Trials in Washington

Washington has 205 clinical trials currently recruiting participants, ranking #22 among all states. The most-studied condition is Ovarian Cancer with 8 active trials.

205

Total Trials

205

Recruiting

#22

National Rank

Conditions

Trials by Phase

Not Applicable

Phase 1 / Phase 2

Phase 2 / Phase 3

Early Phase 1

Phase 1

Phase 2

Phase 3

Phase 4

Top Conditions in Washington

#	Condition	Trials
1	Ovarian Cancer	8
2	Multiple Myeloma	7
3	Colorectal Cancer	5
4	Multiple Sclerosis	4
5	Renal Cell Carcinoma	4
6	Hemophilia A	4
7	Solid Tumor	4
8	Posttraumatic Stress Disorder	4
9	Cancer	4
10	Crohn's Disease	3
11	Mesothelioma, Malignant	3
12	Chronic Graft Versus Host Disease	3
13	PTSD	3
14	Solid Tumor, Adult	3
15	CRC	3
16	NSCLC	3
17	Alzheimer Disease	3
18	Hemophilia B	3
19	Fallopian Tube Cancer	3
20	Non-small Cell Lung Cancer	3

Top Sponsors in Washington

#	Sponsor	Trials
1	University of Washington	23
2	Fred Hutchinson Cancer Center	10
3	Seattle Children's Hospital	9
4	Regeneron Pharmaceuticals	6
5	Novartis Pharmaceuticals	4
6	Amgen	4
7	Va Office of Research and Development	3
8	VA Office of Research and Development	3
9	Pfizer	3
10	Eli Lilly and Company	3
11	Merck Sharp & Dohme LLC	3
12	Hoffmann-La Roche	3
13	Columbia University	2
14	National Institute of Allergy and Infectious Diseases (NIAID)	2

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.

Sources: ClinicalTrials.gov

Trial counts reflect currently recruiting studies listed on ClinicalTrials.gov with locations in this state.

Washington Trial Details →All State Statistics →

The this entity category groups every U.S. clinical trials and research registries entity sharing this attribute. The list above is the data; the paragraphs below explain what the grouping means against the broader the NIH ClinicalTrials.gov registry distribution and how to read the relative rankings within the category.

For readers using this category as a starting point, the per-entity detail pages linked from the table above carry the underlying the NIH ClinicalTrials.gov registry data in full. The category-level view is the filter; the per-entity pages are the actual answer.

Source: ClinicalTrials.gov, 2026.