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Rare Diseases clinical trials in Chicago, IL

8 studies for Rare Diseases are looking for participants at sites in and around Chicago (within about 30 miles). Open a study to see who can join and how to contact the study team.

Recruiting for a study here? Feature it at the top of this page — $99 for 30 days →

About Rare Diseases

A rare disease is one that affects fewer than 200,000 people in the United States. There are nearly 7,000, affecting more than 25 million Americans.

More about Rare Diseases on MedlinePlus

Rare Diseases trials in other cities

• Boston, MA9 studies
• Washington, DC8 studies
• Philadelphia, PA7 studies
• Los Angeles, CA5 studies
• Cincinnati, OH5 studies
• Columbus, OH4 studies
• New York City, NY3 studies
• Durham, NC3 studies
• Seattle, WA3 studies
• Atlanta, GA3 studies
• Houston, TX3 studies
• St. Louis, MO3 studies

Other studies in Chicago

• Non-Small Cell Lung Cancer61 studies
• Breast Cancer58 studies
• Cancer (all types)51 studies
• Metastatic Cancer45 studies
• Prostate Cancer45 studies
• Obesity41 studies
• Lung Cancer41 studies
• Ovarian Cancer36 studies
• Stroke34 studies
• Colorectal Cancer33 studies
• Heart Failure31 studies
• Overweight28 studies

From ClinicalTrials.gov, data retrieved Oct 5, 2026. Each study sets its own eligibility; the study team decides who can join.