In the run up to the 1989 Spanish general election, various organisations carried out opinion polling to gauge voting intention in Spain during the term of the 3rd Cortes Generales. Results of such polls are displayed in this article. The date range for these opinion polls is from the previous general election, held on 22 June 1986, to the day the next election was held, on 29 October 1989.

Voting intention estimates refer mainly to a hypothetical Congress of Deputies election. Polls are listed 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" columns on the right shows the percentage-point difference between the parties with the highest percentages in a poll.

Electoral polling Nationwide polling Voting intention estimates The table below lists nationwide 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; 176 seats were required for an absolute majority in the Congress of Deputies.

Polling firm/Commissioner Fieldwork date Sample size Turnout PNV LV ARM Lead 1989 general election 29 Oct 1989 69.7 39.6 7.9 5.0 9.1 1.2 1.1 0.5 1.0 0.7 0.8 0.7 25.8 1.1 13.8 PSOE 29 Oct 1989? 68 40.8 8.1 5.2 9.0 1.3 1.1 0.6 1.3 0.5 – 0.7 24.0 – 16.8 Metis/RTVE 29 Oct 1989 40,000?? ????????????? Opina 29 Oct 1989??? ????????????? Demoscopia/Cadena SER 29 Oct 1989 91,451? 40.1 ????????????? Sigma Dos/COPE 29 Oct 1989??? ????????????? Eco Consulting/Levante-EMV 22 Oct 1989??? ???????? –???? Metra Seis/El Independiente 22 Oct 1989??? ??????????? –? PP 22 Oct 1989? 65? – – – – – – – – – –? –? ICP–Research/Diario 16 16–19 Oct 1989 9,524? 40.5 8.5 4.9 10.3 1.4 1.2 0.5?? –? 19.1? 21.4 Opina/La Vanguardia 16–18 Oct 1989 3,262 70 41.5 6.5 4.5 7.5 1.9 1.0 0.8 1.2 0.6 2.2 1.0 25.0 2.7 16.5 PSOE 17 Oct 1989?? 40.0 8.0 – 9.0 – – – – – – – 21.0 – 19.0 Sigma Dos/El Mundo 16–17 Oct 1989 8,400? 39.2 10.3 4.9 8.0 1.4 1.1 0.6 1.2 0.3 1.8 0.5 24.2 1.9 15.0 Gruppo/Colpisa 16–17 Oct 1989 1,500 70 40.1 9.3 4.8 7.5 1.1 1.0 0.6 1.2 – 1.8 0.6 23.6 2.1 16.5 Demoscopia/El País 9–15 Oct 1989 6,200 68 41.6 9.1 5.0 8.0 1.5 1.0 0.7?? – 0.4 22.8 1.2 18.8 Opina/La Vanguardia 7–11 Oct 1989 2,800 67 41.0 9.0 4.8 8.8 2.0 0.5 1.0 1.4 0.7 – 1.0 24.0 3.3 17.0 PSOE 6 Oct 1989?? 40.0 8.0 – 6.0 – – – – – – – 20.0 – 20.0 Gruppo/Colpisa 30 Sep–1 Oct 1989 1,500 67–72 38.3 9.0 4.7 7.4 1.1 1.1 0.7 1.2 – 1.8 0.7 24.1 2.0 14.2 Demoscopia/El País 25–30 Sep 1989 6,200 68 42.1 7.3 4.6 8.7 1.1 0.9 0.6? – – 0.3 23.8 1.2 18.3 CIS 23–27 Sep 1989 2,482?? ? –? – – – – – – –? –? Tribuna 22 Sep 1989??? ??????? – –???? AEB/Cinco Días 22 Sep 1989? 60? ????? –? – –???? Metra Seis/El Independiente 19–22 Sep 1989 13,950? 38.2 9.2 5.0 8.0 1.3 1.0 0.6 – – – 0.5 22.3 – 15.9 ICP–Research/Diario 16 16–19 Sep 1989 1,600? 38.2 9.1 4.7 10.0 1.3 1.4 – – – – – 20.2 – 18.0 CIS 7–14 Sep 1989 27,421? 43.0 9.0 – 8.0 – – – – – – – 21.0 – 22.0 Sigma Dos/Tiempo 7–8 Sep 1989 800? 38.0–39.0 10.0–11.0 4.5–4.7 8.0–9.0 1.0–1.1 1.0–1.1 0.7 – – – 0.6 22.5–24.0 – 15.0–15.5 Iope–Etmar/El Periódico 4–8 Sep 1989 1,483? 43.0 8.4 3.8 7.6 1.0 0.8 0.6 2.0? –? 22.8 – 20.2 Sigma Dos/Tiempo 2–3 Sep 1989 800? 39.0–41.0 8.5–9.5 4.5–5.0 6.5–7.5 1.0–1.2 1.0–2.0 0.5–0.8 – – – 0.8–1.1 23.0–25.0 – 16.0 DYM/Cambio 16 29–30 Aug 1989 1,000? 40.6 9.2 5.2 6.4 1.4 1.4 1.1 – – – 0.9 25.1 – 15.5 1989 EP election 15 Jun 1989 54.7 39.6 7.1 4.1 6.1 1.3 1.4 0.7 1.7 0.7 1.0 0.9 21.4 3.8 18.2 CIS 9–11 May 1989 4,459? 39.5 14.6 5.1 7.1 1.2 – – – – – – 26.6 – 12.9 Opina/La Vanguardia 7–10 Apr 1989 1,610? 38.6 12.6 6.4 6.4 – – – – – – – 26.5 – 12.1 Gallup/Cambio 16 30 Jan 1989 600? 35.1 14.6 4.1 7.6 – – – – – – – 30.1 – 5.0 Opina/La Vanguardia 17–18 Jan 1989 1,621? 37.9 23.1 13.2 6.2 6.6 – – – – – – – – – 14.8 ICP–Research/Diario 16 15 Jan 1989 1,200? 37.5 20.8 13.7 4.5 9.1 – – – – – – – – – 16.7 Metra Seis/El Independiente 13 Jan 1989 1,000? 37.0 23.0 12.0 5.5 8.5 1.5 1.5 – – – – – – – 14.0 CIS 16–19 Dec 1988 2,498???? –? – – – – – – – – –? Opina/La Vanguardia 13 Dec 1988?? 36.0 28.0 10.0 6.8 8.0 – – – – – – – – – 8.0 ICP–Research/Diario 16 11 Dec 1988?? 41.0 19.0 11.0 5.0 9.0 1.0 – – – – – – – – 22.0 Opina/La Vanguardia 29–30 Nov 1988 1,600? 34.3 27.1 9.9 7.2 7.8 – – – – – – – – – 7.2 Eco Consulting/CDS 1–21 Nov 1988 1,832? 39.0 26.0 14.0 – 7.0 – – – – – – – – – 13.0 Iope–Etmar/El Periódico 15–17 Nov 1988 700? 39.9 24.9 14.2 5.0 4.2 – – – – – – – – – 15.0 ICP–Research/Diario 16 19–21 Sep 1988?? 41.0 15.5 13.6 5.7 7.5 0.7 – – – – – – – – 25.5 Emopública/Diario 16 27 Jun 1988?? 38.0 24.0 14.0 – 7.0 – – – – – – – – – 14.0 Emopública–Burke/AP 19 May 1988 1,800? 36.0–37.0 26.0–27.0 11.5–12.5 3.5–4.0 5.5–6.5 <1.0 1.5 <1.0 – – – <1.0 – – 10.0 Emopública/Diario 16 24 Apr 1988?? 34.0 24.0 15.0 – 7.0 – – – – – – – – – 10.0 CIS 8–10 Mar 1988 2,495? 42.0 22.0 12.0–14.0 – 5.0–6.0 – – – – – – – – – 20.0 Emopública/Diario 16 28 Feb 1988?? 38.0 23.0 17.0 – 8.0 – – – – – – – – – 15.0 CIS 12–16 Feb 1988 2,485? 43.9 23.0 12.5 – 5.5 – – – – – – – – – 20.9 CIS 29 Jan–1 Feb 1988 2,478? 44.0 25.0 13.0 – 6.0 – – – – – – – – – 19.0 CIS 22–26 Jan 1988 2,497? 42.0 23.0 14.5 – 6.0 – – – – – – – – – 19.0 Emopública–Burke/AP 24 Jan 1988?? 37.0–39.0 20.0–22.0 11.0–13.0 3.0–4.0 4.0–6.0 1.0 2.0–4.0 1.0 – – – <1.0 – – 17.0 Emopública/Diario 16 17 Jan 1988?? 40.0 26.0 14.0 5.0 6.0 – – – – – – – – – 14.0 Emopública/Diario 16 20 Dec 1987?? 39.0 25.0 14.0 6.0 5.0 – – – – – – – – – 14.0 Emopública/Diario 16 15 Nov 1987?? 40.0 27.0 17.0 – – – – – – – – – – – 13.0 Emopública–Burke/AP 25 Oct 1987?? 38.0–40.0 23.0–25.0 11.0–13.0 3.5–4.0 4.0–6.0 1.0 2.0–4.0 1.0 – – – <1.0 – – 15.0 Emopública/Diario 16 11 Oct 1987?? 34.0 20.0 24.0 – – – – – – – – – – – 10.0 Metra Seis/El Independiente 1–6 Sep 1987?? 35.5 20.4 21.9 5.6 5.8 – – – – – – – – – 13.6 1987 EP election 10 Jun 1987 68.5 39.1 24.6 10.3 4.4 5.3 1.1 1.3 0.6 0.9 0.8 0.6 1.0 – – 14.5 1987 local elections 10 Jun 1987 69.4 37.1 20.9 9.8 5.2 7.9 1.2 1.2 0.6 1.1 0.8 0.1 1.1 – – 16.2 Sofemasa/AP 16 Apr 1987 6,000? 35.0 23.0 17.0 – 8.0 – – – – – – – – – 12.0 Gallup/El Periódico 19 Oct–23 Dec 1986 1,994? 42.0 23.1 11.6 – – – – – – – – – – – 18.9 CIS 18–21 Sep 1986 2,813? 44.7 21.9 14.2 5.4 4.5 1.2 – – – – – – – – 22.8 1986 general election 22 Jun 1986 70.5 44.1 26.0 9.2 5.0 4.6 1.5 1.1 0.5 0.5 0.3 0.2 – – – 18.1

Voting preferences The table below lists raw, unweighted voting preferences.