17,996,621
Düsseldorf
| City | Population | Dialling Code | ||
|---|---|---|---|---|
| Köln | 969,709 | |||
| Dortmund | 588,680 | |||
| Essen, Ruhr | 582,140 | |||
| Düsseldorf | 572,663 | |||
| Duisburg | 504,403 | |||
| Bochum | 388,179 | |||
| Wuppertal | 361,077 | |||
| Bielefeld | 328,012 | |||
| Bonn | 311,938 | |||
| Gelsenkirchen | 270,107 | |||
| Münster, Westfalen | 270,038 | |||
| Mönchengladbach | 261,966 | |||
| Aachen | 257,821 | |||
| Krefeld | 238,270 | |||
| Oberhausen | 214,024 | |||
| | ||||