Leuna (German pronunciation:[ˈlɔʏna]) is a town in Saxony-Anhalt, eastern Germany, south of Merseburg and Halle, on the river Saale.

The town is known for the Leunawerke, at 13 km² one of the biggest chemical industrial complexes in Germany, where a very wide range of chemicals and plastics is produced.

In 1960, Leuna's population was nearly 10,000, but after reunification high unemployment rates and poor living conditions, including pollution from nearby industries, caused significant outward migration. Before the 31 December 2009 incorporation of ten neighbouring municipalities, its population had declined to 6,670.