The most important metropolitan areas and their 2007 populations are:
Madrid 5,603,285
Barcelona 4,667,136
Valencia 1,671,189
Sevilla 1,294,081
Bilbao 950,829
Málaga 897,563
Asturias (Gijón-Oviedo) 857,079
Alicante-Elche 748,565
Zaragoza 731,803
Vigo 662,412
Las Palmas de Gran Canaria 616,903
Bahía de Cádiz (Cádiz-Jerez de la Frontera) 615,494
Santa Cruz de Tenerife 573,825
Murcia 563,272
Palma de Mallorca 474,035
Granada 472,638
San Sebastián 402,168
Tarragona 406,042
A Coruña 403,007
Valladolid 400,400
Santander - Torrelavega 391,480
Cordoba 323,600
Pamplona 309,631