José Antonio Ardanza EAJ/PNV José Antonio Ardanza EAJ/PNV A regional election was held in the Basque Country on 28 October 1990 to elect the 4th Parliament of the autonomous community . All 75 seats in the Parliament were up for election. The Basque Nationalist Party (EAJ/PNV) won 22 seats, the Socialist Party of the Basque Country (PSE–PSOE) came second with 16 seats, Popular Unity (HB) came third with 13 seats and Basque Solidarity (EA) won 9 seats. The People's Party (PP) and Basque Country Left (EE) each won 6 seats. Under the 1979 Statute of Autonomy , the Basque Parliament was the unicameral legislature of the Basque Autonomous Community , having legislative power in devolved matters , as well as the ability to grant or withdraw confidence from a lehendakari . [ 1 ] The electoral and procedural rules were supplemented by national law provisions. [ 2 ] The term of the Basque Parliament expired four years after the date of its previous election, unless it was dissolved earlier. The election decree was required to be issued no later than 25 days before the scheduled expiration date of parliament and published on the following day in the Official Gazette of the Basque Country (BOPV), with election day taking place between 54 and 60 days after the decree's publication. [ 3 ] The previous election was held on 30 November 1986, which meant that the chamber's term would have expired on 30 November 1990. The election decree was required to be published in the BOPV no later than 6 November 1990, setting the latest possible date for election day on 5 January 1991. The lehendakari had the prerogative to dissolve the Basque Parliament at any given time and call a snap election , provided that no motion of no confidence was in process. [ 4 ] In the event of an investiture process failing to elect a lehendakari within a 60-day period from the Parliament's reconvening, the chamber was to be automatically dissolved and a fresh election called. [ 5 ] The Basque Parliament was officially dissolved on 3 September 1990 with the publication of the corresponding decree in the BOPV, setting election day for 28 October. [ 6 ] Electoral system Voting for the Parliament was based on universal suffrage , comprising all Spanish nationals over 18 years of age, registered in the Basque Country and with full political rights , provided that they had not been deprived of the right to vote by a final sentence , nor were legally incapacitated . [ 7 ] The Basque Parliament had 75 seats. All were elected in three multi-member constituencies —corresponding to the provinces of Álava , Biscay and Guipúzcoa , each of which was assigned a fixed number of 25 seats to provide for an equal parliamentary representation of the three provinces—using the D'Hondt method and closed-list proportional voting , with a five percent- threshold of valid votes (including blank ballots ) [ b ] in each constituency. [ 8 ] The law did not provide for by-elections to fill vacant seats ; instead, any vacancies arising after the proclamation of candidates and during the legislative term were filled by the next candidates on the party lists or, when required, by designated substitutes . [ 9 ] The tables below list opinion polling results in reverse chronological order, showing the most recent first and using the dates when the survey fieldwork was done, as opposed to the date of publication. Where the fieldwork dates are unknown, the date of publication is given instead. The highest percentage figure in each polling survey is displayed with its background shaded in the leading party's colour. If a tie ensues, this is applied to the figures with the highest percentages. The "Lead" column on the right shows the percentage-point difference between the parties with the highest percentages in a poll. Voting intention estimates The table below lists weighted voting intention estimates. Refusals are generally excluded from the party vote percentages, while question wording and the treatment of "don't know" responses and those not intending to vote may vary between polling organisations. When available, seat projections determined by the polling organisations are displayed below (or in place of) the percentages in a smaller font; 38 seats were required for an absolute majority in the Basque Parliament . Voting preferences The table below lists raw, unweighted voting preferences. 1 People's Party results are compared to People's Alliance – Liberal Party totals in the 1986 election. 2 Alliance for the Republic results are compared to Internationalist Socialist Workers' Party totals in the 1986 election. 3 Communist Party of Spain (Marxist–Leninist) results are compared to Republican Popular Unity totals in the 1986 election. Distribution by constituency Government formation ↑ Results for AP – PL in the 1986 election. ↑ As per amendments introduced by the 1990 electoral law. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Within PP . 1 2 3 4 5 Does not include non-resident citizens . Opinion poll sources ↑ "Elecciones de 28 de octubre de 1990 al Parlamento Vasco" . Revista de Derecho Político (in Spanish). 1991. ↑ "El PNV es el partido que más se beneficia de los logros de la coalición con el PSOE" . La Vanguardia (in Spanish). 21 October 1990. 1 2 3 "Los sondeos pronostican una fuerte subida del PP y la victoria del PNV" . ABC (in Spanish). 14 October 1990. 1 2 3 "Los sondeos pronostican una fuerte subida del PP y la victoria del PNV" . ABC Sevilla (in Spanish). 15 October 1990. ↑ "El PNV ganará las elecciones vascas y el PP triplicará sus escaños" . El País (in Spanish). 7 October 1990. ↑ "PNV se consolida como ganador, el PP experimenta un gran avance y el PSOE desciende ligeramente" . El País (in Spanish). 7 October 1990. ↑ "Ficha técnica del sondeo" . El País (in Spanish). 7 October 1990. ↑ "Encuestas sobre los comicios vascos pronostican incrementos del PNV y PP" . ABC (in Spanish). 1 October 1990. ↑ "Encuestas sobre los comicios vascos pronostican incrementos del PNV y PP" . ABC Sevilla (in Spanish). 1 October 1990. ↑ "Una encuesta del Gobierno vasco da al PNV y al PSE la mayoría" . ABC Sevilla (in Spanish). 3 February 1990. ↑ Statute (1979) , arts. 25 & 27–28 . ↑ LEPV (1990) , final prov. 1 . ↑ Statute (1979) , art. 26 ; LEPV (1990) , art. 46 . ↑ LGV (1981) , arts. 7 & 50–51 . ↑ LGV (1981) , art. 6 . ↑ Decree 227/1990 (1990) , art. 1 .

↑ Statute (1979) , art. 26 ; LEPV (1990) , arts. 2–3 ( suppl. by LOREG (1985) , art. 42 ). ↑ Statute (1979) , art. 26 ; LEPV (1990) , arts. 9–12 ; Decree 227/1990 (1990) , art. 2 . ↑ LEPV (1990) , arts. 12 & 65 ( suppl. by LOREG (1985) , arts. 46 & 48 ). 1 2 3 Lozano, Carles. "Elecciones al Parlamento Vasco / Eusko Legebilitzarra (desde 1980)" . Historia Electoral.com (in Spanish) . Retrieved 9 November 2024 . 1 2 "Resultados Electorales" (in Spanish). Basque Government . Retrieved 28 December 2025 . ↑ "Acuerdo de 22 de noviembre de 1990, de la Junta Electoral de la Comunidad Autónoma, por la que se dispone la publicación de los resultados correspondientes al escrutinio general de las elecciones al Parlamento Vasco celebradas el día 28 de octubre de 1990" (PDF) . Official Gazette of the Basque Country (in Spanish) (241): 11212– 11215. 3 December 1990. ISSN 2483-5366 . Retrieved 13 May 2026 . Ley Orgánica 3/1979, de 18 de diciembre, de Estatuto de Autonomía para el País Vasco (Organic Law 3/1979). Official State Gazette (in Spanish). 18 December 1979 [version as of 22 December 1979]. BOE-A-1979-30177 . Retrieved 12 March 2026 . Ley 7/1981, de 30 de junio, sobre Ley de Gobierno (Law 7/1981). Official State Gazette (in Spanish). 30 June 1981 [version as of 23 November 1988]. BOE-A-2012-5927 . Retrieved 12 March 2026 . Ley Orgánica 5/1985, de 19 de junio, del Régimen Electoral General (Organic Law 5/1985). Official State Gazette (in Spanish). 19 June 1985 [version as of 3 April 1987]. BOE-A-1985-11672 . Retrieved 5 October 2025 . Ley 5/1990, de 15 de junio, de Elecciones al Parlamento Vasco (Law 5/1990). Official State Gazette (in Spanish). 15 June 1990 [version as of 6 July 1990]. BOE-A-2012-2859 . Retrieved 12 March 2026 . Decreto 227/1990, de 1 de septiembre por el que se disuelve el Parlamento Vasco y se convocan elecciones (PDF) (Decree 14/1998). Official Gazette of the Basque Country (in Spanish). 1 September 1990 . Retrieved 12 March 2026 . June: Andalusia October: Basque Country Balearic Islands Castile and León Castilla–La Mancha Valencian Community March: Catalonia October: Galicia June: Andalusia October: Basque Country Balearic Islands Castile and León Castilla–La Mancha Valencian Community November: Catalonia March: Andalusia October: Galicia October: Basque Country Balearic Islands Castile and León Castilla–La Mancha Valencian Community October: Catalonia 1990 in the Basque Country (autonomous community) 1990 regional elections in Spain Regional elections in the Basque Country (autonomous community) October 1990 in Spain Articles with short description Short description matches Wikidata CS1 Spanish-language sources (es) Hidden templates using styles Pages using bar box without float left or float right