How many workers died building the Panama Canal?

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25,000 workers. Around 25,000 workers died across the French and American construction efforts, most from malaria and yellow fever. The American phase succeeded largely because it started by attacking mosquitoes rather than by digging. Reason from workforce and duration. A project of this kind employed tens of thousands of labourers at a time over several decades of intermittent work, in a tropical climate with no effective disease control for most of that period. A mortality rate of a few percent per year across that workforce produces a total in the tens of thousands. The cause is the part that reframes the number, and it is in the explanation: most deaths were from malaria and yellow fever rather than from accidents or engineering failure. The canal was not primarily a construction problem; it was a public health problem that happened to involve digging, which is why the earlier attempt failed. That is why the successful phase began with mosquitoes. The Americans invested first in drainage, screening and fumigation, and only then in excavation — a sequencing decision that is the single reason the project was completed. Death tolls for large infrastructure projects usually tell you what the actual obstacle was, and here it was disease rather than earth.

Source	Panama Canal Authority historical records
Figure refers to	1914
Last checked	September 1, 2026
Unit	workers

How many workers died building the Panama Canal?

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