莱纳河是德国一条流经图林根与下萨克森地区的河流，也是Aller的支流，全长281公里。大城汉诺威、哥廷根位在莱纳河岸边。

• Bundesamt für Naturschutz: Landschaftssteckbrief "Leine-Ilme-Senke"

The Leine (Old Saxon Lagina) is a river in Thuringia and Lower Saxony, Germany. It is a left tributary of the River Aller (and so of the River Weser as well) and 281 kilometres (175 mi) long.

The river's source is located close to the town of Leinefelde in Thuringia. About 40 kilometres (25 mi) downriver, the river enters Lower Saxony and runs northwards.