Merchweiler is a municipality in the district of Neunkirchen, in Saarland, Germany. It is situated approximately 10 km west of Neunkirchen, and 15 km northeast of Saarbrücken. The municipality of Merchweiler consists of two parts: Merchweiler (village) and Wemmetsweiler (village).

Twin towns — sister cities

Merchweiler is twinned with:

• Falicon, France (1987)