Number of clinical trials in United States
United States: Number of clinical trials was 6,222 trials in 2024. ◆ Volatile
Number of clinical trials in United States, 2000–2024
Source: ClinicalTrials.gov (2025) – with major processing by Our World in Data. Measured in trials.
Analysis
United States recorded 6,222 trials for number of clinical trials in 2024.
That represents a change of down 7.3% on the previous year and up 19.8% over ten years.
Over the whole period, number of clinical trials in United States peaked at 6,826 trials in 2022 and was at its lowest, 329 trials, in 2000.
United States ranks 1st of 153 countries on this measure, in the top 10%.
The series is highly variable year to year, so single readings are best treated with caution.
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 2000s | 1,786 trials | 329 trials | 4,031 trials | 10 |
| 2010s | 5,389 trials | 4,164 trials | 6,795 trials | 10 |
| 2020s | 6,423 trials | 6,136 trials | 6,826 trials | 5 |
Countries ranked near United States
More reference data data for United States
- Emission Totals - Emissions (N2O) - Manure Management 52.14 (2050)
- Emission Totals - Emissions (N2O) - Manure applied to Soils 64.85 (2050)
- Emission Totals - Indirect emissions (N2O) - Manure left on Pasture 24.55 (2050)
- Emission Totals - Emissions (N2O) - Burning - Crop residues 3.28 (2050)
- Emission Totals - Indirect emissions (N2O) - Manure applied to Soils 19.34 (2050)
- Emission Totals - Emissions (N2O) - Crop Residues 112.69 (2050)
- Emission Totals - Indirect emissions (N2O) - Crop Residues 20.7 (2050)
- Emission Totals - Emissions (CO2eq) from N2O (AR5) - Manure Management 13,818 (2050)
- Emission Totals - Indirect emissions (N2O) - IPCC Agriculture 119.42 (2050)
- Emission Totals - Emissions (CO2eq) from N2O (AR5) - Manure applied to 17,186 (2050)
Frequently asked questions
- What is number of clinical trials in United States?
- Number of clinical trials in United States was 6,222 trials in 2024, according to ClinicalTrials.gov (2025) – with major processing by Our World in Data.
- What is the highest number of clinical trials recorded in United States?
- The highest recorded value was 6,826 trials in 2022.
- What is the lowest number of clinical trials recorded in United States?
- The lowest recorded value was 329 trials in 2000.
- How does United States rank for number of clinical trials?
- United States ranks 1st out of 153 countries with data for 2024.
- Is number of clinical trials rising or falling in United States?
- Over the last ten years it is up 19.8%. The long-run trend across the full record is volatile.
- Where does this United States data come from?
- The figures come from ClinicalTrials.gov (2025) – with major processing by Our World in Data, published as part of Number of clinical trials. Statizoid updates them automatically from the source API.
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CSV · JSON — 25 observations, free to reuse under CC BY 4.0 (Our World in Data).
About this data
Annual number of completed clinical trials registered in the ClinicalTrials.gov database for each country. Registration in the ClinicalTrials database is mandatory for trials in the United States, but voluntary for other countries.