The population distribution of the municipality is extremely uneven. In its inhabited areas, Cádiz is one of the most densely populated cities in Europe. The uninhabited Zona Franca industrial area, Bay of Cádiz Port Area, and Bay of Cádiz Natural Park occupy 63.63% of the municipal area. The entire city population lives in the remaining , at an average density close to 30,000 inhabitants per square kilometer. The city is divided for statistical purposes into 10 divisions, the most densely populated one having 39,592 inhabitants per square kilometer, the least having 20,835.