The Cologne/Bonn Region (German: Region Köln/Bonn), also known as Cologne/Bonn Metropolitan Region (Metropolregion Köln/Bonn) is a metropolitan area in North Rhine-Westfalia, Germany, covering the cities of Cologne, Bonn and Leverkusen, as well as the districts of Rheinisch-Bergischer Kreis, Oberbergischer Kreis, Rhein-Erft-Kreis and Rhein-Sieg-Kreis. The region covers an area of 3,839 km² with 3,13 million inhabitants[1] (population density 815/km²).
The Cologne/Bonn Region has been established by local governments within the Cologne Government Region in 1992, on the basis to promote common policies in regional and urban planning, traffic, environment and investments. Most prominent co-operations are the Cologne/Bonn Airport and the Verkehrsverbund Rhein-Sieg. The Cologne/Bonn region lies within the larger Rhine-Ruhr region, and forms a counter-balance to the more integrated Ruhr area, which also lies within the Rhine-Ruhr. Since 2008, studies are being undertaken to include cities of the Lower Rhine region (most notably the city of Düsseldorf) into the alliance, in order to form a so called Rhineland metropolitan region (Metropolregion Rheinland)[2].
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Eurostat's Urban Audit splits the Cologne/Bonn region into two Larger Urban Zones (LUZ). These two Urban Zones do not cover the district of Oberbergischer Kreis.
| Larger Urban Zone | major cities | area | population |
|---|---|---|---|
| Cologne Larger Urban Zone[3][4] | 1,627 km² | 1,873,580 | |
| Cologne | 405 km² | 996,690 | |
| Bergisch Gladbach | 83 km² | 110,217 | |
| Leverkusen | 79 km² | 161,279 | |
| Bonn Larger Urban Zone[5][6] | 1,295 km² | 908,503 | |
| Bonn | 141 km² | 316,416 | |
| Cologne/Bonn Region | 2,922 km² | 2,782,083 |