Charles-François de Broglie, marquis de Ruffec, French soldier and diplomat (d. 1791)
Charles-François de Broglie, marquis de Ruffec (19 August 1719 – 16 August 1781), was a French soldier and diplomat from the House of Broglie.

He served in the French Army and was one of the foremost diplomats in the service of Louis XV. He is chiefly remembered in connection with the Secret du Roi.