In addition to the immediate surroundings of the Inner City, the urban area includes a narrow strip extending southwest along the Neckar River and incorporating the Marbach power plant.

The village centre lies in the shallow hollow of the Weidenbach, while the Kaisersbach forms a depression between Rielingshausen and Hinterbirkenhof.

Siegelhausen, a small hamlet with about 30 inhabitants, is located about five kilometres southeast of the core town off the road between Affalterbach and Hochdorf in the valley of the Strombach, which is also called the Apfelbach.

Marbach am Neckar was founded by the Franks in the 8th century AD between the Duchies of Swabia and Franconia and the Prince-Bishoprics of Speyer and Constance.

[2] The city (Stadt) of Marbach am Neckar covers 18.06 square kilometers (6.97 sq mi) of the district of Ludwigsburg in a total of four separate exclaves.

Marbach's municipal areas are physically located in the basin of [de] the Neckar, with the exception of its easternmost exclave, which lies in the Swabian-Franconian Forest.

Also in Marbach's municipal area are the minor administrative units of Dampfkraftwerk, Eichgraben, and Häldenmühle, and the abandoned villages of Hegnachsiedel, Kaisersberg, and Sigebotesbuch.

The right half has a crenelated, white tower wrapped with green vines growing two clusters of blue grapes.