The Parc du Cinquantenaire or Jubelpark is a large public, urban park of 30 ha (74 acres) in the easternmost part of the European Quarter in Brussels, Belgium.

Today, the various buildings of the Cinquantenaire host three museums—the Royal Museum of the Armed Forces and of Military History, the Art & History Museum and Autoworld—as well as the Great Mosque of Brussels. The surrounding park esplanade is used for several purposes in the summer, such as military parades and drive-in movies. It is also the starting point for the 20 km of Brussels, an annual run with 30,000 participants.