Hesse (/hɛs/, US also /ˈhɛsə, ˈhɛsi/, Hessian dialect: [ˈhɛzə]) or Hessia (UK: /ˈhɛsiə/, US: /ˈhɛʃə/; German: Hessen [ˈhɛsn̩] (listen)), officially the State of Hesse (German: Land Hessen), is a state in Germany. Its capital city is Wiesbaden, and the largest urban area is Frankfurt, which is also the country's principal financial centre. Two other major historic cities are Darmstadt and Kassel. With an area of 21,114.73 square kilometers and a population of over six million, it ranks seventh and fifth, respectively, among the sixteen German states. Frankfurt Rhine-Main, Germany's second-largest metropolitan area (after Rhine-Ruhr), is mainly located in Hesse. As a cultural region, Hesse also includes the area known as Rhenish Hesse (Rheinhessen) in the neighbouring state of Rhineland-Palatinate.
