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: 3371 // Recruiting: 3371 // Updated: Daily

United States currently has 3,371 clinical trials with at least one registered site in the country, of which 3,371 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, Massachusetts General Hospital. By stage, active United States trials break down as Phase 1 (581), Phase 2 (711), Phase 3 (258), Phase 4 (146). 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 73 Prostate Cancer 46 Obesity 45 Cancer 37 Healthy 31 Multiple Myeloma 30 Acute Myeloid Leukemia 30 Colorectal Cancer 27 Heart Failure 27 Aging 26 Lung Cancer 26 Ovarian Cancer 25 Depression 24 Hypertension 24 Stroke 23 Endometrial Cancer 22 Cardiovascular Diseases 22 Advanced Solid Tumor 20 Autism Spectrum Disorder 20 Pain 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: September 2026 · Data Methodology