| Circonscription | Sièges | Liste | Voix | Sièges | Sénateurs | Parti |
 Andalousie |
| Almería | 4 | PP | | | 3 | Miguel Ángel Castellón Rubio | PP | |
| | Juan José Matarí Sáez |
| | Carmen Belén López Zapata |
| PSOE | | | 1 | Antonio Martínez Rodríguez | PSOE | |
| Cadix | 4 | PP | | | 3 | José Ignacio Landaluce Calleja | PP | |
| | María José García-Pelayo Jurado |
| | María del Carmen Pérez Becerra |
| PSOE | | | 1 | Alfonso Carlos Moscoso González | PSOE | |
| Cordoue | 4 | PP | | | 3 | Fernando Priego Chacón | PP | |
| | Cristina Casanueva Jiménez |
| | Lorena Guerra Sánchez |
| PSOE | | | 1 | María de los Ángeles Luna Morales | PSOE | |
| Grenade | 4 | PP | | | 3 | Vicente Azpitarte Pérez | PP | |
| | Francisco Joaquín Camacho Borrego |
| | María Eva Martín Pérez |
| PSOE | | | 1 | José Entrena Ávila | PSOE | |
| Huelva | 4 | PP | | | 1 | Carmelo Romero Hernández | PP | |
| PSOE | | | 1 | María Eugenia Limón Bayo | PSOE | |
| PP | | | 1 | Juan Manuel González Camacho | PP | |
| PSOE | | | 1 | Amaro Huelva Betanzos | PSOE | |
| Jaén | 4 | PP | | | 2 | Francisco Javier Márquez Sánchez | PP | |
| | Mariola Aranda García |
| PSOE | | | 1 | José Latorre Ruiz | PSOE | |
| PP | | | 1 | Francisco Javier Bermúdez Carrillo | PP | |
| Malaga | 4 | PP | | | 3 | José Alberto Armijo Navas | PP | |
| | Ángel Luis González Muñoz |
| | Lucía Yeves Leal |
| PSOE | | | 1 | Rafael Granados Ruiz | PSOE | |
| Séville | 4 | PSOE | | | 3 | Antonio Gutiérrez Limones | PSOE | |
| | Eva Patricia Bueno Campanario |
| | Antonio Muñoz Martínez |
| PP | | | 1 | Juan Manuel Ávila Gutiérrez | PP | |
 Aragon |
| Huesca | 4 | PP | | | 3 | Melania Mur Sangrá | PP | |
| | Javier Campoy Monreal |
| | Ana María Beltrán Villalba |
| PSOE | | | 1 | Rosa María Serrano Sierra | PSOE | |
| Saragosse | 4 | PP | | | 3 | Luisa Fernanda Rudi Úbeda | PP | |
| | María del Rocío Dívar Conde |
| | José Manuel Aranda Lassa |
| PSOE | | | 1 | Miguel Carmelo Dalmau Blanco | PSOE | |
| Teruel | 4 | PP | | | 3 | Emma Buj Sánchez | PP | |
| | Carmen Pobo Sánchez |
| | Manuel Blasco Marqués |
| PSOE | | | 1 | María José Villalba Chavarría | PSOE | |
 Asturies |
| Asturies | 4 | PP | | | 1 | Pablo González Menéndez | PP | |
| PSOE | | | 1 | María Fernández Álvarez | PSOE | |
| PP | | | 2 | María Teresa Mallada de Castro | PP | |
| | José Manuel Fernández Díaz |
 îles Baléares |
| Ibiza-Formentera | 1 | PSOE-Sumar | | | 1 | Juanjo Ferrer Martínez | Sans | |
| Majorque | 3 | PP | | | 2 | María Salom Coll | PP | |
| | Martí Ángel Torres Valls |
| PSOE | | | 1 | Pere Joan Pons Sampietro | PSOE | |
| Minorque | 1 | PP | | | 1 | Cristóbal Marqués Palliser | PP | |
 Pays basque |
| Álava | 4 | PSOE | | | 3 | Julia Liberal Liberal | PSOE | |
| | Adolfo Lander Vera |
| | Paula Somalo García |
| EH Bildu | | | 1 | Josu Estarrona Elizondo | EH Bildu | |
| Biscaye | 4 | PNV | | | 3 | Nerea Ahedo Ceza | PNV | |
| | María Dolores Etxano Varela |
| | Igotz López Torre |
| PSOE | | | 1 | Txema Oleaga Zalvidea | PSOE | |
| Guipuscoa | 4 | EH Bildu | | | 3 | Gorka Elejabarrieta Diaz | EH Bildu | |
| | Olaia Duarte López |
| | Mario Zubiaga Garate |
| PNV | | | 1 | Luke Uribe-Etxebarria Apalategi | PNV | |
 îles Canaries |
| El Hierro | 1 | AHI | | | 1 | Aniceto Javier Armas González | AHI | |
| Fuerteventura | 1 | PSOE | | | 1 | Paloma Hernández Cerezo | PSOE | |
| Grande Canarie | 3 | PSOE | | | 2 | Ramón Morales Quesada | PSOE | |
| | Marta Jorgina Saavedra Doménech |
| PP | | | 1 | Sergio Ramos Acosta | PP | |
| La Gomera | 1 | ASG | | | 1 | Fabián Chinea Correa | ASG | |
| La Palma | 1 | PSOE | | | 1 | Kilian Sánchez San Juan | PSOE | |
| Lanzarote | 1 | PSOE | | | 1 | Francisco Manuel Fajardo Palarea | PSOE | |
| Tenerife | 3 | PSOE | | | 2 | Pedro Manuel Martín Domínguez | PSOE | |
| | Marta Arocha Correa |
| PP | | | 1 | Emilio José Navarro Castenedo | PP | |
 Cantabrie |
| Cantabrie | 4 | PP | | | 3 | Elena Castillo López | PP | |
| | Severiano Ángel Cuesta Alonso |
| | Juan Carlos García Diego |
| PSOE | | | 1 | Secundino Caso Roiz | PSOE | |
 Castille-La Manche |
| Albacete | 4 | PP | | | 3 | Simón Valentín Bueno Vargas | PP | |
| | Miriam García Navarro |
| | Pilar Milagros Rojo Noguera |
| PSOE | | | 1 | Amparo Torres Valencoso | PSOE | |
| Ciudad Real | 4 | PP | | | 3 | Rosa Romero Sánchez | PP | |
| | Leopoldo Jerónimo Sierra Gallardo |
| | Raúl Dalmacio Valero Mejía |
| PSOE | | | 1 | Julián Nieva Delgado | PSOE | |
| Cuenca | 4 | PP | | | 3 | Benjamín Prieto Valencia | PP | |
| | María Jesús Bonilla Domínguez |
| | Alejo Joaquín Miranda de Larra Arnaiz |
| PSOE | | | 1 | Carmen Torralba Valiente | PSOE | |
| Guadalajara | 4 | PP | | | 3 | Lucas Castillo Rodríguez | PP | |
| | María Patricio Zafra |
| | María Montserrat Rivas de la Torre |
| PSOE | | | 1 | Araceli Martínez Esteban | PSOE | |
| Tolède | 4 | PP | | | 3 | Vicente Tirado Ochoa | PP | |
| | Israel Roberto Pérez Jiménez |
| | Carmen Riolobos Regadera |
| PSOE | | | 1 | José Manuel Tofiño Pérez | PSOE | |
 Castille-et-León |
| Ávila | 4 | PP | | | 3 | Juan Pablo Martín Martín | PP | |
| | Alicia García Rodríguez |
| | Piedad Sánchez García |
| PSOE | | | 1 | Jesús Caro Adanero | PSOE | |
| Burgos | 4 | PP | | | 3 | Francisco Javier Lacalle Lacalle | PP | |
| | Salvador de Foronda Vaquero |
| | Raquel González Benito |
| PSOE | | | 1 | Ander Gil García | PSOE | |
| León | 4 | PP | | | 3 | Antonio Silván Rodríguez | PP | |
| | María Asunción Mayo Fernández |
| | Jorge García Vega |
| PSOE | | | 1 | Salvador Vidal Varela | PSOE | |
| Palencia | 4 | PP | | | 3 | Jorge Domingo Martínez Antolín | PP | |
| | Carlos Alfonso Polanco Rebolleda |
| | María José Ortega Gómez |
| PSOE | | | 1 | Rosa María Aldea Gómez | PSOE | |
| Salamanque | 4 | PP | | | 3 | Bienvenido de Arriba Sánchez | PP | |
| | Gonzalo Robles Orozco |
| | Esther Basilia del Brío González |
| PSOE | | | 1 | Elena Diego Castellanos | PSOE | |
| Ségovie | 4 | PP | | | 3 | Paloma Inés Sanz Jerónimo | PP | |
| | Juan José Sanz Vitorio |
| | María Ángeles García Herrero |
| PSOE | | | 1 | María del Lirio Martín García | PSOE | |
| Soria | 4 | PP | | | 3 | José Manuel Hernando García | PP | |
| | Javier Jiménez Santamaría |
| | María Cristina Rubio Blasco |
| PSOE | | | 1 | Javier Antón Cacho | PSOE | |
| Valladolid | 4 | PP | | | 3 | Jesús Julio Carnero García | PP | |
| | José Ángel Alonso Pérez |
| | María Arenales Serrano Argüello |
| PSOE | | | 1 | José Javier Izquierdo Roncero | PSOE | |
| Zamora | 4 | PP | | | 3 | José María Barrios Tejero | PP | |
| | Natalia Ucero Pérez |
| | Fernando Martínez-Maíllo Toribio |
| PSOE | | | 1 | José Fernández Blanco | PSOE | |
 Catalogne |
| Barcelone | 4 | PSC | | | 3 | Manuel Cruz Rodríguez | PSC | |
| | Elena Vila Gómez |
| | Gabriel Colomé García |
| ERC | | | 1 | Joan Queralt i Jiménez | ERC | |
| Gérone | 4 | PSC | | | 3 | Consol Cantenys Arbolí | PSC | |
| | Martí Sans Pairuto |
| | Lluïsa Blanch Fulcarà |
| Junts | | | 1 | Joan Bagué i Roura | Junts | |
| Lleida | 4 | PSC | | | 3 | Dionís Oña Martín | PSC | |
| | Pasión Gador Romero García |
| | Jan Pomés López |
| ERC | | | 1 | Sara Bailac i Ardanuy | ERC | |
| Tarragone | 4 | PSC | | | 3 | Manel de la Vega Carrera | PSC | |
| | Núria Rovira Costas |
| | Mario Soler Santos |
| ERC | | | 1 | Jordi Gaseni Blanch | ERC | |
 Estrémadure |
| Badajoz | 4 | PSOE | | | 2 | Rafael Damián Lemus Rubiales | PSOE | |
| | María Teresa Macías Mateos |
| PP | | | 2 | José Antonio Monago Terraza | PP | |
| | Carmen Pagador López |
| Cáceres | 4 | PP | | | 1 | Mónica Grados Caro | PP | |
| PSOE | | | 2 | Miguel Ángel Nacarino Muriel | PSOE | |
| | María Isabel Moreno Duque |
| PP | | | 1 | María Dolores Marcos Moyano | PP | |
 Galice |
| La Corogne | 4 | PP | | | 3 | Rosa María Gallego Neira | PP | |
| | Verónica María Casal Míguez |
| | Manuel Santos Ruiz Rivas |
| PSOE | | | 1 | José Antonio Sánchez Bugallo | PSOE | |
| Lugo | 4 | PP | | | 3 | José Manuel Barreiro Fernández | PP | |
| | María José Gómez Rodríguez |
| | Juan Carlos Serrano López |
| PSOE | | | 1 | César Alejandro Mogo Zaro | PSOE | |
| Ourense | 4 | PP | | | 3 | María del Carmen Leyte Coello | PP | |
| | Luis Menor Pérez |
| | Rosa María Sánchez Gándara |
| PSOE | | | 1 | Rafael Rodríguez Villarino | PSOE | |
| Pontevedra | 4 | PP | | | 3 | María José Pardo Pumar | PP | |
| | José Crespo Iglesias |
| | Nidia María Arévalo Gómez |
| PSOE | | | 1 | María del Carmen Silva Rego | PSOE | |
 Communauté de Madrid |
| Madrid | 4 | PP | | | 3 | Pedro Rollán Ojeda | PP | |
| | Pío García-Escudero Márquez |
| | Paloma Martín Martín |
| PSOE | | | 1 | José Manuel Franco Pardo | PSOE | |
 Région de Murcie |
| Murcie | 4 | PP | | | 3 | Francisco Martín Bernabé Pérez | PP | |
| | Antonio Luengo Zapata |
| | Antonia López Moya |
| PSOE | | | 1 | Inmaculada Sánchez Roca | PSOE | |
 Communauté forale de Navarre |
| Navarre | 4 | PSOE | | | 3 | Javier Remírez Apesteguía | PSOE | |
| | Nuria Medina Santos |
| | Antonio Magdaleno Alegría |
| UPN | | | 1 | María Mar Caballero Martínez | UPN | |
 La Rioja |
| La Rioja | 4 | PP | | | 3 | Luis Martínez-Portillo Subero | PP | |
| | Carlos Yécora Roca |
| | María del Mar San Martín Ibarra |
| PSOE | | | 1 | Concha Andreu Rodríguez | PSOE | |
 Communauté valencienne |
| Alicante | 4 | PP | | | 3 | Eva Ortiz Vilella | PP | |
| | Agustín Almodóbar Barceló |
| | María Dolores Esteve Juan |
| PSOE | | | 1 | Ana Martínez Zaragoza | PSOE | |
| Castellón | 4 | PP | | | 2 | Vicente Martínez Mus | PP | |
| | Susana Marqués Escoín |
| PSOE | | | 1 | Amparo Marco Gual | PSOE | |
| PP | | | 1 | Vicente Tejedo Tormo | PP | |
| Valence | 4 | PP | | | 1 | Estela del Carmen Darocas Marín | PP | |
| PSOE | | | 1 | Juan Antonio Sagredo Marco | PSOE | |
| PP | | | 1 | Luis Javier Santamaría Ruiz | PP | |
| PSOE | | | 1 | Cristina Moreno Fernández | PSOE | |
 Ceuta |
| Ceuta | 2 | PP | | | 2 | Cristina Díaz Moreno | PP | |
| | Abdelhakim Abdeselam Al Lal |
 Melilla |
| Melilla | 2 | PP | | | 2 | Fernando Adolfo Gutiérrez Díaz de Otazu | PP | |
| | Isabel María Moreno Mohamed |
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