Siersthal (; Lorraine Franconian: Siirschel) is a commune in the Moselle department of the Grand Est administrative region in north-eastern France.
The village belongs to the Pays de Bitche and to the Northern Vosges Regional Nature Park. It is away from the Franco-German border.
The area of Siersthal is , population density is .
The map below shows the location of Siersthal with key infrastructure and adjacent municipalities.