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Washington: below-average open trial sites
913 of 2,795 in-state trials are recruiting (33%); below the 37% national average by 4 percentage points, with Phase 2 weight.
According to ClinicalTrials.gov-derived indexes, Washington sits in the upper half of US states by in-state trial count (#22 of 52 states by registered in-state trial count).
Washington: 2,795 US clinical trials with in-state sites, 913 recruiting.
Washington has 2,795 registered US clinical trials with a study site in-state, 913 of them currently recruiting (below the 37% national average by 4 percentage points). 381 of these trials are in Phase 3 (late-stage) and 677 in Phase 2. The most frequently studied condition in Washington is Breast Cancer, with 56 linked trials.
Mid-pack research density
Washington sits in the upper half of the state corpus, so volume is meaningful but not hub-scale. Use condition and sponsor rollups below to see what drives the in-state mix.
Below-average open, early-phase tilt
Washington still shows 913 recruiting of 2,795 in-state trials (33% open), but below the 37% national average by 4 percentage points, so archived statuses weigh heavier than the national baseline.
- 33%
- open (below national share)
- 913
- still recruiting despite cool share
- 677
- Phase 2 rows in this footprint
- 56
- top: Breast Cancer
Recruiting share is below the 37% national average by 4 percentage points. Counts include every study with at least one recorded site in the state. Registry reference only, not medical advice.
Washington vs all states by indexed in-state trial count
Where this state's ClinicalTrials.gov site count sits among every state with at least one listed trial (coverage density, not care quality)
2,795 Top 42% more indexed trials than 58% of 52 states
States, banded by indexed in-state trial count
Each bar is a band; taller bars hold more states. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source ClinicalTrials.gov · 2026-08-08
Key findings
What ClinicalTrials.gov does not surface for Washington on its own pages , computed from the registry mirror as of 2026-08-08. Each line carries its own denominator so it can be quoted as it stands.
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Washington open-enrollment share sits below the national baseline.
913 of 2,795 in-state trials (32.7%) are recruiting, against 37% nationally (-4.3 percentage points). Counts include every study with at least one recorded site in the state.
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Seattle dominates Washington's trial geography.
Seattle lists 2,156 of 2,795 in-state trials (77.1%) across 591 named facilities. Cities need five or more listed trials to appear here; locations are as filed by sponsors.
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Breast Cancer is the most-studied condition in Washington.
56 of 2,795 in-state trials (2%) list Breast Cancer. That is a local concentration figure, not a national disease ranking.
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One sponsor accounts for a large share of Washington trials.
University of Washington appears on 375 of 2,795 in-state trials (13.4%). Sponsor identity is as filed on ClinicalTrials.gov.
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1,299 Washington trials carry a completed status.
1,299 of 2,795 (46.5%) are completed. The open share above is the remainder that still lists recruiting.
By Status
| Status | Trial count |
|---|---|
| Completed | 1,299 |
| Recruiting | 913 |
| Active | 583 |
By Phase
| Phase | Trial count |
|---|---|
| NA | 694 |
| Phase 2 | 677 |
| Phase 1 | 590 |
| Phase 3 | 381 |
| Phase 4 | 90 |
| Early Phase 1 | 24 |
Top Conditions
Top Sponsors
Where trials run in Washington
Seattle carries 2,156 of Washington's 2,795 indexed trials (77%) across 591 named sites, ahead of Spokane at 188. 8 cities clear five listed trials, together naming 940 distinct sites.
| City | Trials | Listed sites |
|---|---|---|
| Seattle | 2,156 | 591 |
| Spokane | 188 | 121 |
| Tacoma | 173 | 97 |
| Bellevue | 70 | 39 |
| Renton | 42 | 26 |
| Vancouver | 40 | 24 |
| Kirkland | 35 | 24 |
| Everett | 24 | 18 |
Distinct trials and named sites per city, as filed with ClinicalTrials.gov; cities under five trials omitted. Vintage 2026-08-08.
Trial size mid-pack
Washington's in-state trials target 1,820 patients on average (p37 by trial size among 52 states with enrollment data), a mid-pack trial size.
Washington: in-state trial volume sits mid-pack
Geography is concentrated: Seattle alone accounts for 77% of Washington's indexed trials (2,156 of 2,795), with Spokane a distant second at 188.
Phase mix: 381 Phase 3 vs 677 Phase 2 (early-phase heavy).
Top condition: Breast Cancer (56 trials); top sponsor University of Washington (375).
mid-volume · mid-open figures (2,795 trials · 33% open) describe registry geography under the trial size mid-pack read, not clinic capacity or protocol fit. Confirm status on ClinicalTrials.gov before acting.
States near Washington on in-state trial volume
Cross-state peers under the trial size mid-pack read (mid-volume · mid-open), not the same-state browse list.
Similar mid-volume peers (± open share)
- Virginia · 2,598 trials · 40% recruiting
- Indiana · 3,113 trials · 29% recruiting
- Arkansas · 2,376 trials · 28% recruiting
- District of Columbia · 2,316 trials · 31% recruiting
- New Jersey · 3,402 trials · 34% recruiting
Similar mid-open peers (± trial volume)
- Missouri · 33% recruiting · 4,116 trials
- North Carolina · 33% recruiting · 5,625 trials
- Iowa · 33% recruiting · 1,544 trials
- New Hampshire · 33% recruiting · 471 trials
- California · 33% recruiting · 16,646 trials