Unna (district) in the context of "Ruhr area"

The Ruhr (/ˈrʊər/ ROOR; German: Ruhrgebiet [ˈʁuːɐ̯ɡəˌbiːt] , also Ruhrpott German pronunciation: [ˈʁuːɐ̯pɔt] ), also referred to as the Ruhr Area, sometimes Ruhr District, Ruhr Region, or Ruhr Valley, is a polycentric urban area in North Rhine-Westphalia, Germany. With a population density of 1,160/km and a population of over 5 million (2017), it is the largest urban area in Germany and the third of the European Union. It consists of several large cities bordered by the rivers Ruhr to the south, Rhine to the west, and Lippe to the north. In the southwest it borders the Bergisches Land. It is considered part of the larger Rhine-Ruhr metropolitan region of more than 10 million people, which is the third largest in Western Europe, behind only London and Paris.

The Ruhr cities are, from west to east: Duisburg, Oberhausen, Bottrop, Mülheim an der Ruhr, Essen, Gelsenkirchen, Bochum, Herne, Witten, Hagen, Dortmund, Hamm and the districts of Wesel, Recklinghausen, Unna and Ennepe-Ruhr-Kreis. The most populous cities are Dortmund (with a population of approximately 612,065), Essen (about 583,000) and Duisburg (about 497,000).

Recklinghausen (German pronunciation: [ʁɛklɪŋˈhaʊzən] ) is a Kreis (district) in the centre of North Rhine-Westphalia, Germany. It is surrounded by the neighbouring districts of Borken, Coesfeld, Unna, Gelsenkirchen, Bottrop, and Wesel. The district administration is located in the city of the same name.

Apart from the Region Hannover, Kreis Recklinghausen is the largest non-city district in Germany by population.

Coesfeld (German pronunciation: [ˈkoːsfɛlt]) is a Kreis (district) in the northwestern part of North Rhine-Westphalia, Germany, west of the city of Münster. Neighboring districts are Steinfurt, district-free Münster, Warendorf, district-free Hamm, Unna, Recklinghausen, and Borken.

Soest (German: [ˈzoːst] ) is a Kreis (district) in the middle of North Rhine-Westphalia, Germany. Neighbouring districts are Warendorf, Gütersloh, Paderborn, Hochsauerland, Märkischer Kreis, Unna and the independent town of Hamm.

The Märkischer Kreis (German pronunciation: [ˌmɛʁkɪʃɐ ˈkʁaɪs], lit. 'Markian District') is a district (Kreis) in central North Rhine-Westphalia, Germany. Neighbouring districts are Unna, Soest, Hochsauerland, Olpe, Oberbergischer Kreis, Ennepe-Ruhr, and the city of Hagen.