| Image Coa: | DEU Niederwallmenach COA.svg |
| Coordinates: | 50.1658°N 7.8131°W |
| Image Plan: | Niederwallmenach in EMS.svg |
| State: | Rheinland-Pfalz |
| District: | Rhein-Lahn-Kreis |
| Verbandsgemeinde: | Nastätten |
| Elevation: | 332 |
| Area: | 6.88 |
| Postal Code: | 56357 |
| Area Code: | 06772 |
| Licence: | EMS, DIZ, GOH |
| Gemeindeschlüssel: | 07 1 41 097 |
| Website: | www.niederwallmenach.de |
| Mayor: | Peggy Beyer[1] |
| Leader Term: | 2019 - 24 |
Niederwallmenach is a village and a municipality in the district of Rhein-Lahn, in Rhineland-Palatinate, in western Germany.