The Prix Paul de Moussac is a Group 3 flat horse race in France open to three-year-old thoroughbred colts and geldings.

It is run at Chantilly over a distance of 1,600 metres (about 1 mile), and it is scheduled to take place each year in June.

The event was established in 1909, and it was originally called the Prix de La Jonchere.

The Prix de La Jonchere was abandoned throughout World War I, with no running from 1915 to 1918.

In 2006 the event was renamed in memory of Paul de Moussac (1924–1995), a leading racehorse owner and breeder.