Population and Housing Censuses  
Municipal Rankings (only for municipalities with more than 10,000 inhabitants)
Municipalities with a greater absolute depopulation since 2001
Units: persons

;2011 Censal Population;2001 Censal Population;Absolute variation 2011/2001 Censuses;
11012-Cádiz: Cádiz;124,014;133,363;-9,349;
15036-Ferrol: Coruña, A;71,690;77,950;-6,260;
33037-Mieres: Asturias;42,425;47,719;-5,294;
47186-Valladolid: Valladolid;311,682;316,580;-4,898;
37274-Salamanca: Salamanca;151,658;156,368;-4,710;
48078-Portugalete: Bizkaia;47,698;51,066;-3,368;
48015-Basauri: Bizkaia;41,777;45,085;-3,308;
48084-Sestao: Bizkaia;28,805;31,773;-2,968;
39075-Santander: Cantabria;178,095;180,717;-2,622;
33002-Aller: Asturias;12,111;14,639;-2,528;
33011-Cangas del Narcea: Asturias;14,088;16,511;-2,423;
33060-San Martín del Rey Aurelio: Asturias;17,993;20,247;-2,254;
24202-Villablino: León;10,238;12,459;-2,221;
48044-Getxo: Bizkaia;80,252;82,285;-2,033;
33073-Tineo: Asturias;10,647;12,598;-1,951;
33031-Langreo: Asturias;43,934;45,731;-1,797;
33034-Valdés: Asturias;13,064;14,789;-1,725;
33033-Lena: Asturias;12,346;13,573;-1,227;
20055-Arrasate/Mondragón: Gipuzkoa;21,975;23,118;-1,143;
08904-Badia del Vallès: Barcelona;13,603;14,714;-1,111;
15070-Pontes de García Rodríguez, As: Coruña, A;11,021;12,097;-1,076;
20030-Eibar: Gipuzkoa;27,382;28,219;-837;
14052-Peñarroya-Pueblonuevo: Córdoba;11,639;12,440;-801;
37046-Béjar: Salamanca;14,401;15,123;-722;
15077-Santa Comba: Coruña, A;10,076;10,794;-718;
38037-Santa Cruz de la Palma: Santa Cruz de Tenerife;16,568;17,265;-697;
15035-Fene: Coruña, A;13,807;14,496;-689;
33026-Grado: Asturias;10,765;11,454;-689;
36017-Estrada (A): Pontevedra;21,626;22,308;-682;
39059-Reinosa: Cantabria;10,050;10,694;-644;
Notes:
Source: Instituto Nacional de Estadística