The Blue Banana (English, Blue Banana), also known as European Megalopolis or European Ridge is a term that refers to an urban corridor within the European continent characterized by a high population density and a concentration of economic and industrial activity, extending from Manchester, in the United Kingdom to Milan, in Italy. It covers cities such as Manchester, London, Brussels, Amsterdam, Lille, Cologne "Cologne (Germany)"), Frankfurt am Main, the Ruhr area, Luxembourg, Strasbourg, Basel, Zurich, Milan and Turin - at the beginning of the century the Parisian agglomeration, Genoa, Monaco, Nice are also being included in such a conurbation - and covers one of the largest concentrations of the world's inhabitants, money and industry.[1]​ The concept was developed in 1989 by RECLUS, a group of French geographers led by Roger Brunet.[2]​ About 90 million people live in the Blue Banana. The name has been given to it because of the image it presents in satellite photos.

The following table includes cities and metropolitan areas.