Saarburg (German pronunciation: [ˈzaːɐ̯bʊʁk], [ˈzaːɐ̯bʊʁç]) is a city of the Trier-Saarburg district, in the state of Rhineland-Palatinate, Germany, on the banks of the river Saar in the hilly country a few kilometers upstream from the Saar's junction with the Moselle.

Now known as a tourist attraction, the river Leuk flows into the town centre and makes a spectacular drop of some 60 feet before joining the larger Saar that bisects the town.

The waterfall is the result of a 13th-century project to redirect the Leuk through the city centre.

The history of the city begins with the construction of the now-ruined castle by Graf Siegfried of Luxembourg in 964.

From 18 July 1946 to 6 June 1947 Onsdorf, in its then municipal boundary, formed part of the Saar Protectorate.