Jean-Jacques Louis Philippe Guerrier (December 19, 1757 - April 15, 1845) was a career officer and general in the Haitian Army who became President of Haïti on May 3, 1844. He died in office on April 15, 1845. A respected soldier, Guerrier had successfully commanded the southern black army during the Haitian Revolution. After Haiti became independent, he retired from active service and became a plantation owner. King Henry I gave him the hereditary title of Duke of l'Avancé.