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: 3439 // Recruiting: 3439 // Updated: Daily

United States currently has 3,439 clinical trials with at least one registered site in the country, of which 3,439 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, Stanford University. By stage, active United States trials break down as Phase 1 (578), Phase 2 (690), Phase 3 (263), Phase 4 (143). 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 72 Prostate Cancer 44 Obesity 43 Cancer 42 Ovarian Cancer 36 Stroke 34 Healthy 34 Depression 33 Lung Cancer 28 Colorectal Cancer 26 Hypertension 25 Endometrial Cancer 25 Heart Failure 23 Multiple Myeloma 23 Alzheimer Disease 23 Traumatic Brain Injury 22 Advanced Solid Tumor 21 Acute Myeloid Leukemia 21 Major Depressive Disorder 21 Anxiety 20

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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: July 2026 · Data Methodology