Hesse or Hessia, officially the State of Hesse, 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, is mainly located in Hesse.

Rhenish Hesse or Rhine Hesse is a region and a former government district in the German state of Rhineland-Palatinate. It is made up of territories west of the Upper Rhine river that were part of the Grand Duchy of Hesse and its successor in the Weimar Republic, the People's State of Hesse from 1816 to 1945. The hilly countryside is largely devoted to vineyards, comprising the Rheinhessen wine region.