The title of Duke of Polignac (French:Duc de Polignac) is a French dukedom.
The title was originally created in 1780 by brevet, which meant it was not hereditary. It was made heritable in 1783. In 1817 the holder was made a peer of France.
The third Duke was created (before his succession to the dukedom) a prince of the Papal States in 1820, authorised to bear the title in France in 1822, and granted the same rank in the Kingdom of Bavaria in 1838; his descendants bear the title Prince or Princesse de Polignac. Other members of the family bear the title Comte or Comtesse de Polignac.
The wife of the first duke was the famous Yolande de Polastron. The mathematician Prince Alphonse de Polignac, soldier Prince Camille de Polignac and composer Prince Edmond de Polignac were younger sons of the third duke. Princess Edmond de Polignac, wife of the last named, was the heiress Winnaretta Singer. Comte Pierre de Polignac, a great-great-grandson of the first duke, married Princess Charlotte, Duchess of Valentinois and was the father of Rainier III, Prince of Monaco.