Rhinau (French pronunciation: [ʁino] ⓘ; German: Rheinau) is a commune in the Bas-Rhin department of Grand Est in north-eastern France.

After a flood in 1541, an uninhabited 58% of its territory (10 km²) happened to end up on the right bank of the Rhine, in Germany.

These 997 hectares are thus managed under German sovereignty, but, de facto run by the commune of Rhinau.

This is due to a meander of the Rhine in 1541, and was made note of in the Treaty of Westphalia in 1648 as the Thirty Years Wars was brought to a close.

Rhinau is a stop in the Véloroute Rhin EV 15 (1,320 km) which connects the source of the Rhine in Andermatt, Switzerland and its terminus in Rotterdam.