the European Union and ranks as the 19th largest country in the world in terms of population. Its population density stands at . The United Nations Population Fund lists Germany as host to the second-highest number of international migrants worldwide, around 23% of Germany's population do not hold a German passport or are direct descendants of immigrants. The number of third and subsequent generations of immigrants are not statistically recorded. Administrative divisions Germany comprises sixteen states that are collectively referred to as Länder. Each state has its own state constitution and is largely autonomous in regard to its internal organisation. Due to differences in size and population the subdivision of these states varies, especially between city states (Stadtstaaten) and states with larger territories (Flächenländer). For regional administrative purposes five states, namely Baden-Württemberg, Bavaria, Hesse, North Rhine-Westphalia and Saxony, consist of a total of 22 Government Districts (Regierungsbezirke). As of July 2021 Germany is divided into 400 districts (Kreise) on municipal level, these consist of 294 rural districts and 106 urban districts. Urbanization Germany has a number of large cities; the most populous are: Berlin, Hamburg, Munich, Cologne, Frankfurt, and Stuttgart. The largest conurbation is the Rhine-Ruhr region (12 million), including Düsseldorf (the capital of North Rhine-Westphalia), Cologne, Essen, Dortmund, Duisburg, and Bochum. See also Administrative divisions of Germany Geography of Europe Geology of Germany List of islands of Germany List of national parks of Germany List of nature parks in Germany Natural regions of Germany Notes References External links Kostenlose Deutschland-Karten Geoberg.de: Geologie Deutschlands – Fotografien geologischer Objekte aus Deutschland mineralienatlas.de: Reiches Erz aus dem Harz Deutscher Klimaatlas Geography of Germany – Encyclopedia of World Geography