Monheim am Rhein is a town situated on the right bank of the Rhine River in North Rhine-Westphalia, Germany. It lies within the district of Mettmann, positioned between the southern suburbs of Düsseldorf to the north and the Bergisches Land region to the east. The city borders Leverkusen to the south, Cologne across the river to the southwest, and Dormagen to the west. Administratively, it functions as an independent municipality following its re-establishment in 1976.

The town possesses approximately 850 years of recorded history, first documented in 1150 as a fishermen's village within the Earldom of Berg. It served as the administrative center for surrounding villages until the formation of the Rhine Confederation in 1806. Monheim gained city status in 1960 after incorporating Baumberg and Hitdorf, briefly became part of Düsseldorf in 1974, and regained independence two years later, adopting its current official name in 1994.

The municipality consists of the districts of Baumberg and Monheim, with the latter comprising two-thirds of the area. Key landmarks include the Schelmenturm, a 26-meter tower from the early 15th century that now serves as a cultural venue, and Haus Bürgel, a site with Roman origins now used for environmental research. The Friedenskirche in Baumberg is an notable example of Brutalist architecture built between 1968 and 1974.

Cultural heritage is preserved through the Deusserhaus manor house, which houses the local history society museum, and the Franz Boehm Memorial, featuring a bronze bust erected in 2020. The town's dialect, Monnemer Platt, belongs to the Ripuarian language group. Visitors are drawn to its historical sites, including the Gänselieselbrunnen fountain near the town hall and the landscape conservation area of Urdenbacher Kämpe.

As of 2024, the population is 43,630. The local economy supports many commuters traveling to Düsseldorf and Cologne, with travel times of twenty and thirty minutes respectively. Transport links include connections to the A59, A46, A542, A3, and A1 highways, alongside proximity to Düsseldorf and Cologne Bonn airports. Public transport is managed through the VRR and VRS associations, with free local travel available via the Monheim ticket until March 2025.