Johannesberg is a community in the Aschaffenburg district in the Regierungsbezirk of Lower Franconia (Unterfranken) in Bavaria, Germany.

The Church of Saint John's Beheading (Kirche St. Johannes Enthauptung) stands on the peak of the Johannesberg – the community's namesake – 367 m above sea level.

With Count Philipp von Rieneck's death in 1559, the noble family died out and the Bishops of Mainz took over power in the Spessart (range) for good.

After the voluntary phase of municipal reform ended, the community of Steinbach was forcibly incorporated into Johannesberg in 1978.

Between Johannesberg and Val Orne-Ajon in the French department of Calvados, an official partnership was established in 1990 with quite a number of centres, namely Avenay, Amayé-sur-Orne, Maizet, Montigny, Préaux-Bocage, Maisoncelles-sur-Ajon, Sainte-Honorine-du-Fay and Vacognes-Neuilly.

According to official statistics, in 1998, there were 141 workers on the social welfare contribution rolls working in producing businesses.

The three-knolled hill, called a Dreiberg in German heraldry, refers to the community's geographical location in the Vorspessart, and also to the three constituent communities of Johannesberg, Breunsberg and Sternberg, which all end in —berg (German for “mountain”), whereas the wavy bend sinister (slanted stripe), which is meant to resemble a brook, refers to the three constituent communities of Oberafferbach, Steinbach and Rückersbach, which all end in —bach (German for “brook”).

The Baroque Catholic parish church of Saint John's Beheading (Pfarrkirche Sankt Johannes' Enthauptung) stands on the hill above the village.

Every year, the Catholic parish celebrates its patronage on 29 August, the day when the church commemorates the Passion of John the Baptist.