Gerstheim (French pronunciation: [ɡɛʁstaim]) is a commune in the Bas-Rhin department in Alsace in north-eastern France.

During the early twentieth century many jobs were provided by the tobacco and sugar industries.

There is also an EDF hydro-electric installation incorporating a lock and a road crossing on the Rhine.

One of Europe's largest theme parks positioned just across the border provides a large number of mainly seasonal low-paid jobs.

In 1917 German troops requisitioned part of the instrument, but it was restored in 1926 by the Strasbourg organ builder Edmond Alexandre Roethinger.