The Prix du Prince d'Orange is a group-3 flat horse race in France open to three-year-old thoroughbreds.
It is run at Longchamp over a distance of 2,000 metres (about 1¼ miles), and it is scheduled to take place each year in September.
The Prince became a member of the Jockey-Club de Paris in 1863, and took up racehorse ownership shortly before his death.
The Prix du Prince d'Orange was established in 1882.
It was originally open to horses aged three or older and contested at Longchamp over 2,400 metres.