This is a list of spies who engaged in direct espionage. It includes Americans spying against their own country and people spying on behalf of the United States.
American Revolution era spies.
Spied for the Patriots.
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Culper Ring.
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Spied for the Crown.
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Double agents.
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American Civil War era spies.
Union spies.
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Confederate spies.
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American World War One era spies.
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American World War Two era spies.
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American Cold War era spies.
Spied for America.
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Spied for USSR.
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American Gulf War era spies.
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Americans who spied for foreign countries.
CIA.
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NSA.
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FBI.
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Armed Forces.
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Federal contractors.
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References.
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