Clinical trials near you
Clinical trials in the Seattle area
1,389 studies are recruiting volunteers at 499 research sites in the Seattle-Tacoma-Bellevue, WA area.
Sites in Seattle, Tacoma, Bellevue, Kirkland, Everett, Puyallup and 13 more towns.
#14 in the US for recruiting studies#1 in Washington#53 in the US per resident
- Studies recruiting
- 1,389
- Research sites
- 499
- Conditions studied
- 177
- Studies per 100,000 residents
- 33.5
Conditions being studied
The conditions with the most studies recruiting in the area. A study can be for more than one condition.
- Lung cancer97 studies
- Leukemia88 studies
- Breast cancer68 studies
- Non-Hodgkin's lymphoma60 studies
- Prostate cancer60 studies
- Colorectal cancer (bowel cancer)54 studies
- Ovarian cancer35 studies
- Liver disease34 studies
- Neuroendocrine tumor32 studies
- Overweight and obesity32 studies
- Inflammatory bowel disease (IBD)31 studies
- Head and neck cancer30 studies
- Pancreatic cancer30 studies
- Multiple myeloma (MM)29 studies
- Skin cancer27 studies
All 177 conditions
- Lung cancer97
- Leukemia88
- Breast cancer68
- Non-Hodgkin's lymphoma60
- Prostate cancer60
- Colorectal cancer (bowel cancer)54
- Ovarian cancer35
- Liver disease34
- Neuroendocrine tumor32
- Overweight and obesity32
- Inflammatory bowel disease (IBD)31
- Head and neck cancer30
- Pancreatic cancer30
- Multiple myeloma (MM)29
- Skin cancer27
- Myelodysplastic syndrome (MDS)26
- Uterine cancer25
- Bladder cancer24
- Depressive disorder24
- Melanoma22
- Type 1 diabetes22
- Type 2 diabetes22
- Brain cancer21
- Heart failure21
- Crohn's disease20
- Kidney cancer20
- Stroke19
- Alzheimer's disease18
- Anemia18
- Endometrial cancer18
- Ulcerative colitis (UC)18
- Peripheral nerve disease17
- Graft-versus-host disease14
- Cardiovascular disease13
- Cystic fibrosis13
- Human immunodeficiency virus infection (HIV)13
- Liver cancer13
- Multiple sclerosis (MS)13
- Fallopian tube cancer12
- Myelofibrosis12
- Parkinson's disease (PD)12
- Post-traumatic stress disorder (PTSD)12
- Sarcoma of soft tissue12
- Gastric cancer (stomach cancer)11
- Atrial fibrillation (AF)10
- Cervical cancer10
- Congenital heart disease10
- Esophageal cancer10
- Ischemic heart disease (IHD)10
- Anxiety disorder9
- Fatty liver disease (MASH/NASH)9
- Hemophilia A8
- Intellectual disability8
- Motor neuron disease (MND)8
- Retinal degeneration8
- Schizophrenia8
- Traumatic brain injury8
- Attention-deficit hyperactivity disorder (ADHD)7
- Autism spectrum disorder (ASD)7
- Cardiomyopathy7
- Chronic kidney disease (CKD)7
- COVID-197
- Neuroblastoma7
- Sleep apnea7
- Thrombocytopenia7
- Thrombotic microangiopathy7
- Age-related macular degeneration (AMD)6
- Amyotrophic lateral sclerosis (ALS)6
- Biliary tract cancer6
- Chronic obstructive pulmonary disease (COPD)6
- High blood pressure (hypertension)6
- Osteoarthritis (OA)6
- Epilepsy5
- Growth hormone deficiency5
- Hodgkin's lymphoma5
- Influenza (flu)5
- Interstitial lung disease5
- Migraine5
- Psoriasis5
- Pulmonary hypertension5
- Abdominal aortic aneurysm4
- Alcohol dependence4
- Bipolar disorder4
- Down syndrome4
- Duchenne muscular dystrophy (DMD)4
- Gastrointestinal stromal tumor4
- Immune thrombocytopenic purpura (ITP)4
- Opioid use disorder4
- Peripheral vascular disease4
- Primary sclerosing cholangitis4
- Psychotic disorder4
- Rheumatoid arthritis4
- Systemic lupus erythematosus (SLE)4
- Tricuspid valve regurgitation4
- Amyloidosis3
- Birth control (contraception)3
- Essential thrombocythemia (ET)3
- Gallbladder cancer3
- Hemophilia B3
- Huntington's disease (HD)3
- Macular edema3
- Post-transplant lymphoproliferative disorder3
- Progressive supranuclear palsy (PSP)3
- Recurrent urinary tract infection (UTI)3
- Rhabdoid tumor3
- Rhabdomyosarcoma3
- RSV infection3
- Thyroid cancer3
- Vascular dementia3
- Abdominal cancer2
- Asthma2
- Axial spondyloarthritis2
- Bile duct cancer2
- Cerebral palsy2
- Chronic sinusitis2
- Cold agglutinin disease2
- Dry eye syndrome2
- Eczema (atopic dermatitis)2
- Esophagitis2
- Facioscapulohumeral muscular dystrophy2
- Familial multiple polyposis syndrome2
- Frontotemporal dementia (FTD)2
- Germ cell tumor2
- Graves' disease2
- Hearing loss2
- Hidradenitis suppurativa (HS)2
- Hypercholesterolemia2
- Idiopathic inflammatory myopathy2
- Low back pain2
- Neuropathic pain2
- Pericarditis2
- Peritoneal cancer2
- Polycythemia vera2
- Primary biliary cholangitis (PBC)2
- Psoriatic arthritis (PsA)2
- Rett's disorder2
- Sickle cell disease2
- Sjogren's syndrome2
- Smoking dependence2
- Testicular cancer2
- Urinary incontinence2
- Acne1
- Actinic keratosis1
- Acute coronary syndrome1
- Alopecia1
- Alopecia areata1
- Alpha-1-antitrypsin deficiency (AATD)1
- Anal cancer1
- Celiac disease1
- Chronic fatigue syndrome1
- Chronic skin ulcer1
- Complex regional pain syndrome (CRPS)1
- Cutaneous T-cell lymphoma1
- Diabetic eye disease1
- Endometriosis1
- Fabry's disease1
- Gout1
- Hemolytic uremic syndrome1
- Hepatitis C1
- Hypertriglyceridemia1
- Insomnia1
- Irritable bowel syndrome (IBS)1
- Juvenile idiopathic arthritis (JIA)1
- Neurofibromatosis1
- Neurofibromatosis type 1 (NF1)1
- Overactive bladder (OAB)1
- Polymyalgia rheumatica1
- Pompe disease1
- Prader-Willi syndrome1
- Spasmodic torticollis1
- Spinal muscular atrophy (SMA)1
- Systemic sclerosis1
- Thyroid eye disease1
- Tuberculosis1
- Ureteral cancer1
- Urethral cancer1
- Vasculitis1
341 more studies are for conditions not yet in our catalog.
Whom the studies accept
The share of the area's studies open to each group. A study can accept several.
- Adults 18 to 6494%
- Adults 65 and over83%
- Children and teens (under 18)26%
- Healthy volunteers8%
- Open to all sexes93%
- Women only3%
- Men only4%
78 studies are for children only.
Study phases
Earlier phases test safety in fewer people; later phases compare a treatment with the usual care in many.
- Early phase 10%
- Phase 18%
- Phase 1/28%
- Phase 221%
- Phase 2/33%
- Phase 326%
- Phase 42%
- No phase (device, behavioral and other studies)17%
- Not stated15%
Most active research sites
The sites recruiting for the most studies in the area.
- University of WashingtonSeattle215 studies
- Seattle Children's HospitalSeattle191 studies
- Fred Hutchinson Cancer CenterSeattle188 studies
- Fred Hutch/University of Washington Cancer ConsortiumSeattle112 studies
- Swedish Medical Center-First HillSeattle90 studies
- Swedish Cancer Institute-EdmondsEdmonds73 studies
- Swedish Cancer Institute-IssaquahIssaquah61 studies
- Harborview Medical CenterSeattle46 studies
- Swedish Cancer InstituteSeattle43 studies
- Northwest Medical SpecialtiesTacoma40 studies
- Fred Hutchinson Cancer Research CenterSeattle39 studies
- Providence Regional Cancer PartnershipEverett34 studies
- Virginia Mason Medical CenterSeattle34 studies
- VA Puget Sound Health Care System Seattle Division, Seattle, WASeattle33 studies
- Swedish Medical Center-Ballard CampusSeattle32 studies
Cite these figures
Free to use under CC BY 4.0. Please credit LocalTrial with a link to this page.
Source: LocalTrial, Clinical trials in the Seattle area, https://www.localtrial.com/clinical-trials/washington/seattle, updated November 12, 2026.
Source: <a href="https://www.localtrial.com/clinical-trials/washington/seattle">LocalTrial, Clinical trials in the Seattle area</a>, updated November 12, 2026.
About these figures
Counted from ClinicalTrials.gov, the U.S. registry of clinical studies, for studies recruiting in the United States. A study is counted once however many sites it has in the area.
The area is the U.S. Census Bureau's Seattle-Tacoma-Bellevue, WA metropolitan area. Residents: 4,145,494, the Census Bureau's latest estimate. Updated November 12, 2026.
These figures describe studies, not advice. Talk to your doctor before joining one.
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