Berlin
In 2018, Berlin had 3.75 million registered inhabitants in an area of . The city's population density was 4,206 inhabitants per km2. Berlin is the most populous city in Germany and the European Union. The entire Berlin-Brandenburg capital region has a population of more than 6 million in an area of . More than 2.0 million households were counted in the city. Around 60 percent of them were single-person households.