| Image Coa: | DEU Merchweiler COA.svg |
| Coordinates: | 49.35°N 9°W |
| Image Plan: | Merchweiler in NK.svg |
| State: | Saarland |
| District: | Neunkirchen |
| Elevation: | 271-392 |
| Area: | 12.78 |
| Postal Code: | 66584–66589 |
| Area Code: | 06825 |
| Licence: | NK |
| Gemeindeschlüssel: | 10 0 43 113 |
| Divisions: | 2 |
| Website: | www.merchweiler.de |
| Mayor: | Sebastian Maas[1] |
| Leader Term: | 2024 - 34 |
| Party: | CDU |
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).
Merchweiler is twinned with:
Falicon, France (1987)