In the western part of Aschaffenburg, the smaller Aschaff flows into the Main.
Aschaffenburg usually receives less snowfall during the winter than the nearby Spessart.
Nilkheim and Leider are the only districts which are located on the left bank of the river Main.
The following municipalities border Aschaffenburg: Johannesberg, Glattbach, Goldbach, Haibach, Bessenbach, Sulzbach am Main, Niedernberg, Großostheim, Stockstadt am Main and Mainaschaff.
The name Aschaffenburg (Ascaffaburc, Ascapha or Ascaphaburg in the Middle Ages) originally meant "castle at the ash tree river" deriving from the river Aschaff that runs through parts of the town.
The earliest remains of settlements in the area of Aschaffenburg date from the Stone Age. 700 AD, the Ravenna Cosmography names two settlements in region: Uburzis (Würzburg) and Ascapha (Aschaffenburg).
Aschaffenburg was originally a settlement of the Alamanni. Around 550, the area had been conquered by the Franks, and their Hausmeier built a castle here. Peter und Alexander in the second half of the 10th century.
In the 8th century, a Benedictine monastery was founded, dedicated to St. It is mentioned first in 974 in a gift document by Otto II.
In the Middle Ages the town was known as Ascaffaburc, Ascapha or Ascaphaburg.
330, the new capital thereafter being called Constantinople, after its founder, the emperor Constantine I.