雷格尼茨河（德语：Regnitz）位于德国巴伐利亚州，由雷德尼茨河和佩格尼茨河在菲尔特汇流而成，流经埃朗根、福希海姆，最终在班贝格注入美因河。

雷格尼茨河在班贝格附近有一小段成为莱茵-美因-多瑙运河的一部分。

The Regnitz is a river in Bavaria, Germany. It is a left tributary of the Main and is 59 km (37 mi) in length.

The river is formed by the confluence of the rivers Rednitz and Pegnitz, which meet in the city of Fürth. From there the Regnitz runs northwards through the cities of Erlangen and Forchheim. It finally meets the Main near the city of Bamberg.