| Type: | Ortsgemeinde |
| Image Coa: | DEU Niedertiefenbach COA.svg |
| Coordinates: | 50.2567°N 7.8978°W |
| Image Plan: | Niedertiefenbach in EMS.svg |
| State: | Rheinland-Pfalz |
| District: | Rhein-Lahn-Kreis |
| Verbandsgemeinde: | Aar-Einrich |
| Elevation: | 250 |
| Area: | 4.08 |
| Postal Code: | 56368 |
| Area Code: | 06772 |
| Licence: | EMS, DIZ, GOH |
| Gemeindeschlüssel: | 07 1 41 096 |
| Website: | www.niedertiefenbach.de |
| Mayor: | Volkmer Obst[1] |
| Leader Term: | 2019 - 24 |
Niedertiefenbach is a municipality in the district of Rhein-Lahn, in Rhineland-Palatinate, in western Germany. It belongs to the association community of Aar-Einrich.