Building Censuses 
Population figures
Municipalities which have depopulated the most since 1981 by Municipality and  census population.
Units: ?

;Census population of 2001;Census population of 1981;
Barcelona;1,503,884;1,752,627;
Madrid;2,938,723;3,158,818;
Hospitalet de Llobregat (L');239,019;295,074;
Santa Coloma de Gramenet;112,992;140,613;
Badalona;205,836;229,780;
Cádiz;133,363;156,711;
Cornellà de Llobregat;79,979;91,563;
Mieres;47,719;58,718;
Langreo;45,731;56,347;
Ferrol;77,950;87,691;
Eibar;28,219;36,919;
Sestao;31,773;40,374;
Errenteria;38,224;46,496;
Alcoy/Alcoi;58,358;66,396;
Tineo;12,598;20,076;
Basauri;45,085;52,554;
Portugalete;51,066;58,071;
Santurtzi;47,173;53,919;
Valencia;738,441;744,748;
Granada;240,661;246,642;
San Martín del Rey Aurelio;20,247;25,761;
Aller;14,639;20,005;
Valdés;14,789;20,132;
Palmas de Gran Canaria (Las);354,863;360,098;
Estrada (A);22,308;27,322;
Avilés;83,185;87,996;
Pasaia;15,962;20,756;
Sant Adrià de Besòs;31,939;36,397;
Fonsagrada (A);5,082;9,392;
Valladolid;316,580;320,293;
Coín;17,388;20,958;
Baña (A);4,800;8,361;
Cangas del Narcea;16,511;20,037;
Castrelo de Miño;2,034;5,508;
Cualedro;2,391;5,642;
Forcarei;4,801;8,024;
Arrasate o Mondragón;23,118;26,279;
Vilardevós;2,803;5,932;
San Juan de Aznalfarache;19,340;22,465;
Ramirás;2,065;5,132;
Manresa;63,981;67,007;
Covelo;3,743;6,766;
Almadén;6,830;9,722;
Riós;2,132;5,008;
Corvera de Asturias;15,885;18,728;
Baltar;1,233;4,018;
Pravia;9,226;11,961;
Pantón;3,341;6,068;
Carcaixent;19,508;22,228;
Pola de Gordón (La);4,719;7,416;
Notes:
1) Not included are municipalities that have gone missing, have been created  or those from which  another municipality has been separated during the period 
 1981-2001.
Source: National Statistics Institute