Philip Joseph, Prince of Salm-Kyrburg (1709–1779) was the first prince of Salm-Kyrburg, from 1743 to 1779. He was the second son of Hendrik Gabriel Joseph, regent of Salm-Kyrburg from 1696 to 1716, and his wife Princess Maria Theresia de Croÿ. He had an elder brother, John, and a sister, Henriëtte (who married Maximilian, Prince van Hornes, who already had two daughters from a previous marriage, the eldest of whom later married Philip Joseph).