Siersthal is a commune in the Moselle department in Lorraine in north-eastern France. It is 10 kilometres (6.2 mi) from the Franco-German border.
The area of Siersthal is 10.5 square kilometres (4.1 sq mi), population density is 63.1 inhabitants per square kilometre (163/sq mi).
The map below shows the location of Siersthal with key infrastructure and adjacent municipalities.
The figure below shows the development of the population from the INSEE.