Ratingen (Limburgish: Rotinge) is a town in the district of Mettmann in North Rhine-Westphalia, Germany.

With a communal reform of 1975 the independent municipalities of Breitscheid, Eggerscheidt, Hösel, Lintorf (seat Angerland) as well as the local part of Homberg and the municipality of Homberg-Meiersberg (seat Hubbelrath) were added to the city of Ratingen.

Ratingen was one of the four places of Berg which experienced an economic boom in the end of the Middle Ages, but slowed during the Thirty Years' War.

The current mayor of Ratingen is Klaus Konrad Pesch of the Christian Democratic Union (CDU) since 2014.

The most recent city council election was held on 13 September 2020, and the results were as follows: Several important international enterprises (particularly from the IT industry) as Vodafone, ASUS, Hewlett-Packard, SAP, CEMEX and Esprit maintain branches and/or main centres in Ratingen.