Data pertaining to The 2005 European Constitution Referendum
Definite number of voters by province and type of voter.
Units: voters

;Spaniards residents in Spain;Spaniards residents abroad;Total;
TOTAL;33,562,329;1,130,162;34,692,491;
Álava;244,239;3,161;247,400;
Albacete;294,538;5,151;299,689;
Alicante/Alacant;1,148,414;17,138;1,165,552;
Almería;413,032;19,911;432,943;
Ávila;138,491;5,155;143,646;
Badajoz;530,183;8,903;539,086;
Balears (Illes);680,078;9,948;690,026;
Barcelona;3,922,465;79,906;4,002,371;
Burgos;293,509;9,466;302,975;
Cáceres;335,371;11,487;346,858;
Cádiz;918,618;17,828;936,446;
Castellón/Castelló;399,077;4,373;403,450;
Ciudad Real;389,535;4,039;393,574;
Córdoba;621,636;13,542;635,178;
Coruña (A);948,088;110,487;1,058,575;
Cuenca;162,615;2,228;164,843;
Girona;469,576;7,595;477,171;
Granada;673,761;26,035;699,796;
Guadalajara;153,343;1,941;155,284;
Guipúzcoa;566,485;14,097;580,582;
Huelva;375,810;4,922;380,732;
Huesca;172,671;4,233;176,904;
Jaén;518,707;8,271;526,978;
León;420,211;29,667;449,878;
Lleida;301,436;10,454;311,890;
Rioja (La);228,831;7,028;235,859;
Lugo;308,748;38,685;347,433;
Madrid;4,320,261;143,011;4,463,272;
Málaga;1,020,637;26,187;1,046,824;
Murcia;930,327;17,272;947,599;
Navarra;454,352;13,003;467,355;
Ourense;287,542;68,095;355,637;
Asturias;924,060;62,155;986,215;
Palencia;147,286;4,713;151,999;
Palmas (Las);727,416;14,000;741,416;
Pontevedra;765,781;89,666;855,447;
Salamanca;293,021;19,409;312,430;
S.C.Tenerife;685,540;46,390;731,930;
Cantabria;463,040;18,143;481,183;
Segovia;122,303;2,155;124,458;
Sevilla;1,421,343;19,771;1,441,114;
Soria;75,274;3,006;78,280;
Tarragona;514,753;8,173;522,926;
Teruel;112,341;3,256;115,597;
Toledo;452,153;5,982;458,135;
Valencia/València;1,856,439;32,348;1,888,787;
Valladolid;424,818;7,481;432,299;
Vizcaya;949,495;21,025;970,520;
Zamora;169,905;11,621;181,526;
Zaragoza;713,744;12,667;726,411;
Ceuta;54,595;2,086;56,681;
Melilla;46,435;2,896;49,331;
Notes:
Source: National Statistics Institute