Rechtenbach is a community in the Main-Spessart district in the Regierungsbezirk of Lower Franconia (Unterfranken) in Bavaria, Germany and a member of the Verwaltungsgemeinschaft (municipal association) of Lohr am Main.

Rechtenbach lies in der Würzburg Region in the Spessart (range) west of Lohr am Main.

It was an early modern industrial centre where plate glass was made for the mirrors of the Lohr State Manufacturer until 1791.

When the glassworks shut down for good in 1791, many villagers worked as wood hewers and sleeper sawyers while the railway was being built.

The oakleaf stands for the community's geographical location in the Spessart and also represents wood's importance to the local economy.

The tinctures gules and argent (red and silver) refer to the former lordship, which was held by Electoral Mainz.