Niedernberg | |
|---|---|
| Coordinates: 49°55′N 9°8′E / 49.917°N 9.133°E | |
| Country | Germany |
| State | Bavaria |
| Admin. region | Unterfranken |
| District | Miltenberg |
| Government | |
| • Mayor (2018–24) | Jürgen Reinhard (CSU) |
| Area | |
| • Total | 15.61 km2 (6.03 sq mi) |
| Elevation | 117 m (384 ft) |
| Population (2024-12-31) | |
| • Total | 4,720 |
| • Density | 300/km2 (780/sq mi) |
| Time zone | UTC+01:00 (CET) |
| • Summer (DST) | UTC+02:00 (CEST) |
| Postal codes | 63843 |
| Dialling codes | 06028 |
| Vehicle registration | MIL |
| Website | www |

Niedernberg is a municipality in the Miltenberg district in the Lower Franconia region in Bavaria, Germany.
Niedernberg is just under 10 km from Aschaffenburg to the north, which itself is about 50 km southeast of Frankfurt am Main. Niedernberg is the Miltenberg district's northernmost municipality and is found right on the Main’s left bank. In both the east and the west, it is hilly.