Arheilgen is a district located in the northern part of the city of Darmstadt, situated in the state of Hesse, Germany. It was officially incorporated into the city in 1937.
The district is bordered by several neighboring areas: Wixhausen lies to the north, and the town of Weiterstadt is located to the west. To the east, Arheilgen borders the Darmstadt district of Kranichstein, while its southern boundary meets the city center of Darmstadt.