Home › Rare Diseases › Illinois › Chicago

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
• Pittsburgh, PA3 studies
• Atlanta, GA3 studies
• New York City, NY3 studies
• Seattle, WA3 studies
• Durham, NC3 studies
• St. Louis, MO3 studies

Other studies in Chicago

• Breast Cancer59 studies
• Non-Small Cell Lung Cancer59 studies
• Cancer (all types)51 studies
• Prostate Cancer45 studies
• Lung Cancer43 studies
• Metastatic Cancer42 studies
• Obesity40 studies
• Ovarian Cancer36 studies
• Colorectal Cancer32 studies
• Stroke31 studies
• Head and Neck Squamous Cell Carcinoma29 studies
• Overweight29 studies

From ClinicalTrials.gov, data retrieved Nov 15, 2026. Each study sets its own eligibility; the study team decides who can join.