ClinicalTrials.gov currently lists 191,375 studies with locations in all 50 States and in 190 countries.

Locations of Recruiting Studies

Recruiting Study Location Count Pie Chart
Legend for Recruiting Study location pie chart image
Pie Color Location
color Non-U.S. Only (53%)
color U.S. Only (41%)
color Both U.S. and Non-U.S. (6%)
Total N = 35,622 studies
(Data as of May 29, 2015)