How many people worked on the Manhattan Project?
History hard Data from 1945
Guess before you scroll — the answer is below
The answer
130,000 people
Roughly 130K.
About 130,000 people worked on the Manhattan Project, the overwhelming majority with no idea what they were building. Secrecy was maintained by compartmentalising the work so thoroughly that entire towns were built without appearing on maps.
Where this number comes from
| Source | U.S. Department of Energy, Manhattan Project history |
|---|---|
| Figure refers to | 1945 |
| Last checked | |
| Unit | people |
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