Pierre Augustin Moncousu (; August 1756Levot, p.355 – 6 July 1801Levot, p.356) was a French naval officer.

Career Moncousu was born in Baugé. He took part in the Battle of Groix commanding Redoutable, and died at the First Battle of Algeciras.

Family Moncousu's first-born son was also named Pierre-Augustin, and served in the Navy as well. Ensign in 1815, he was expelled from the Navy after fomenting a plot with five other officers to ferry Napoléon from Rochefort to the United States.Levot, p.357

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Bibliography

Fonds Marine. Campagnes (opérations; divisions et stations navales; missions diverses). Inventaire de la sous-série Marine BB4. Tome premier : BB4 1 à 482 (1790–1826)