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.
Further reading
Albert Wagner: Niedernberger Heimatbuch. Geschichte und Gegenwart einer Gemeinde am bayerischen Untermain. Sacher-Druck Niedernberg, 1994.