Clinical Trials in United States

Active recruiting clinical trials with sites in United States. Select a condition below to see detailed trial listings.

Total Trials: 3307 // Recruiting: 3307 // Updated: Daily

United States currently has 3,307 clinical trials with at least one registered site in the country, of which 3,307 are actively recruiting participants. The most studied conditions at United States sites are Breast Cancer, Prostate Cancer, Obesity, reflecting where local investigators and sponsors are concentrating enrolment.

Studies are led by sponsors including M.D. Anderson Cancer Center, Mayo Clinic, Memorial Sloan Kettering Cancer Center. By stage, active United States trials break down as Phase 1 (574), Phase 2 (705), Phase 3 (222), Phase 4 (117). All figures update daily from ClinicalTrials.gov — select a condition below for full listings, eligibility and site contacts.

Top Conditions in United States

Breast Cancer 62 Prostate Cancer 49 Obesity 46 Cancer 42 Healthy 36 Multiple Myeloma 30 Ovarian Cancer 28 Stroke 27 Colorectal Cancer 25 Hypertension 25 Chronic Pain 25 Heart Failure 24 Depression 24 Lung Cancer 22 Advanced Solid Tumor 21 Sickle Cell Disease 20 Acute Myeloid Leukemia 20 Alzheimer Disease 20 Opioid Use Disorder 19 Mild Cognitive Impairment 19

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🇨🇦Canada

ClinicalMetric — Independent clinical trial intelligence platform. Not affiliated with NIH, ClinicalTrials.gov, the U.S. FDA, or any pharmaceutical company, hospital, or clinical research organization. Trial data is sourced from ClinicalTrials.gov for informational purposes only and does not constitute medical advice. Do not make any treatment, enrollment, or health decisions based solely on information found here — always consult a qualified healthcare professional. Full Disclaimer · Last Reviewed: November 2026 · Data Methodology