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Number of recruiting clinical trials by US state
California has the most recruiting clinical trials with a study site in the state, with 2,043 distinct recruiting trials in this dataset.
Data as of 2026-09-05
| # | US state | Recruiting trials with a site here |
|---|---|---|
| 1 | California | 2,043 |
| 2 | Texas | 1,739 |
| 3 | New York | 1,655 |
| 4 | Florida | 1,492 |
| 5 | Massachusetts | 1,127 |
| 6 | Ohio | 1,127 |
| 7 | Pennsylvania | 1,125 |
| 8 | Illinois | 1,020 |
| 9 | North Carolina | 975 |
| 10 | Maryland | 890 |
| 11 | Michigan | 863 |
| 12 | Georgia | 799 |
| 13 | Tennessee | 787 |
| 14 | Virginia | 771 |
| 15 | Missouri | 744 |
| 16 | Arizona | 708 |
| 17 | Colorado | 681 |
| 18 | Minnesota | 661 |
| 19 | New Jersey | 661 |
| 20 | Washington | 653 |
| 21 | South Carolina | 496 |
| 22 | Connecticut | 491 |
| 23 | Alabama | 474 |
| 24 | Utah | 440 |
| 25 | Indiana | 435 |
| 26 | Wisconsin | 428 |
| 27 | Oregon | 412 |
| 28 | Kentucky | 410 |
| 29 | Louisiana | 387 |
| 30 | Kansas | 361 |
| 31 | Oklahoma | 350 |
| 32 | Nebraska | 317 |
| 33 | Arkansas | 311 |
| 34 | District of Columbia | 292 |
| 35 | Nevada | 278 |
| 36 | Iowa | 255 |
| 37 | Mississippi | 188 |
| 38 | Rhode Island | 184 |
| 39 | New Mexico | 166 |
| 40 | Idaho | 152 |
| 41 | South Dakota | 151 |
| 42 | New Hampshire | 129 |
| 43 | West Virginia | 128 |
| 44 | Montana | 108 |
| 45 | Delaware | 107 |
| 46 | North Dakota | 97 |
| 47 | Hawaii | 86 |
| 48 | Maine | 79 |
| 49 | Vermont | 71 |
| 50 | Alaska | 53 |