Clinical Trials in Illinois
Illinois ranks #9 nationally by clinical-trial count, with 502 trials listed, all currently recruiting.
Among trials with a recorded phase, Phase 3 is the largest group at 105 trials.
The top conditions by trial volume are Sickle Cell Disease (16), Schizophrenia (10), Prostate Cancer (9).
502
Total Trials
502
Recruiting
#9
National Rank
20
Conditions
Trials by Phase
200
Not Applicable
44
Phase 1 / Phase 2
15
Phase 2 / Phase 3
2
Early Phase 1
33
Phase 1
87
Phase 2
105
Phase 3
16
Phase 4
Top Conditions in Illinois
Top Sponsors in Illinois
Cities With Most Trials in Illinois
| # | City | Trials |
|---|---|---|
| 1 | Chicago | 447 |
| 2 | Evanston | 24 |
| 3 | Peoria | 18 |
| 4 | Springfield | 15 |
| 5 | Maywood | 12 |
| 6 | Glenview | 10 |
| 7 | Skokie | 8 |
| 8 | Gurnee | 7 |
| 9 | Effingham | 7 |
| 10 | O'Fallon | 7 |
| 11 | Willowbrook | 7 |
| 12 | Park Ridge | 6 |
| 13 | Urbana | 6 |
| 14 | Aurora | 5 |
| 15 | Orland Park | 5 |
Important: This information is for research purposes only. Always talk to your doctor about whether a clinical trial is right for you.
Frequently Asked Questions
Illinois currently has 502 clinical trials actively recruiting participants, making it #9 nationally by total trial count.
The most-studied conditions in Illinois are Sickle Cell Disease (16 trials), Schizophrenia (10 trials), Prostate Cancer (9 trials).
Browse the conditions listed on this page to find trials recruiting in Illinois. Each condition page shows trial details, eligibility criteria in plain English, and contact information. Always talk to your doctor about whether a trial is right for you.
Trial counts reflect currently recruiting studies listed on ClinicalTrials.gov with locations in this state.
Source: ClinicalTrials.gov, 2026.