Aschaffenburg is a district in Bavaria, Germany. It is bounded by (from the west and clockwise) the districts of Darmstadt-Dieburg, Offenbach, Main-Kinzig (all in the state of Hesse), the districts Main-Spessart and Miltenberg, and the town of Aschaffenburg.
Remains of Roman settlements are found on the river Main. There was a Roman military camp in what is today the municipality of Stockstadt am Main. After the Roman retreat the region became subject to Alemanni and Franks before eventually being a part of the electorate of Mainz. While the banks of the Main were populated all these centuries, the hills of the Spessart Mountains were virtually unsettled until the 13th century.
The districts of Aschaffenburg and Alzenau were established in 1862, half a century after the region was annexed by the state of Bavaria. These districts were merged in 1972 in order to form the present district.