Wiesbaden is the capital city of the German state of Hesse. It ranks as the second-largest city in the state after Frankfurt am Main and is currently Germany's 24th-largest city, with a population of approximately 283,000 inhabitants.
The city forms part of a conurbation with the neighboring city of Mainz, which has a combined population of about 500,000. This area is embedded within the Rhine-Main Metropolitan Region, Germany's second-largest metropolitan region after Rhine-Ruhr. The broader region includes several other nearby cities, such as Frankfurt am Main, Darmstadt, Offenbach am Main, and Hanau, with a total combined population exceeding 5.8 million.