Nicolas Prosper Bauyn, seigneur d’Angervilliers (15 January 1675 – 15 February 1740) was a French politician.

[1][2] The son of a fermier général, Prosper Bauyn d'Angervilliers was intendant of the généralité of Alençon (1702–1705), then intendant of Dauphiné (1705–1716), of Alsace (1716–1724) and finally of Paris (1724–1728).

[1][3] An experienced administrator, the cardinal de Fleury made him secretary of state for war on the death of Claude le Blanc.

[3] In that post, he reorganised the gendarmerie and carried out preparations for the War of the Polish Succession.

[1] In order not to be reliant on imports, Louis XV had Angervilliers put in charge of setting up a white-metal factory to equip the army with swords and bayonets - this was set up in Klingenthal (Alsace) in 1730.