In the run up to the 1986 Spanish general election, various organisations carried out opinion polling to gauge voting intention in Spain during the term of the 2nd 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 28 October 1982, to the day the next election was held, on 22 June 1986.

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 CG Lead 1986 general election 22 Jun 1986 70.5 44.1 26.0 – 5.0 9.2 1.5 1.1 0.4 0.5 0.5 1.0 0.4 1.1 4.6 18.1 COPE 22 Jun 1986???? – ???? –? ??? Cadena SER 22 Jun 1986???? – ?????? –? ??? Sofemasa/TV3 22 Jun 1986 30,000??? – ?????? –????? RTVE 22 Jun 1986 300,000 68?? – ?????? – –???? ECO/Cadena SER 16 Jun 1986?? 40.2 25.5 – – 9.9 – – – – – 4.0 – 1.3 5.7 14.7 Telemarket/PRD 14 Jun 1986 10,105? 39.1 22.2 – 5.2 5.4 2.5 0.8 0.5 0.5? 9.7 ? 5.0 16.9 OTR–Press 14 Jun 1986 2,497? 45.0–47.0 18.0–21.0 – 11.0–14.0 1.0–2.0 – – – – 9.0–11.0 – – 6.0–9.0 26.0–27.0 Aresco/ABC 11–13 Jun 1986 2,505 71.1 39.9 28.7 – 4.5 9.0 1.8 1.0 0.3 0.4 – 3.2 – 1.3 7.4 11.2 Emopública/Grupo 16 5–11 Jun 1986 6,081 71.9 45.5 23.0 – 10.8 1.7 1.3 1.2 1.0 – 6.2 1.2 5.2 22.5 ECO/Cadena SER 10 Jun 1986 1,326? 40.2 26.3 – 4.8 9.6 1.8 1.1 – 0.6 – 3.7 – 1.3 6.0 13.9 Perfiles 9–10 Jun 1986?? 39.4 19.3 – 5.3 2.9 2.3 – – – – 12.4 – – 7.0 20.1 Gallup/Ya 2–9 Jun 1986 6,046? 40.0 24.0 – 6.0 9.0 2.0 1.0 1.0 1.0 – 4.0 1.0 2.0 6.0 16.0 Demoscopia/El País 5–8 Jun 1986 5,200 70 41.0 24.0 – 6.0 11.0 3.0 1.4 1.0 0.7 0.4 3.0 0.3 6.0 17.0 Iope–Etmar/El Periódico 3–7 Jun 1986 7,209 72–76 42.4 24.1 – 4.7 11.7 1.7 1.1 0.6 0.5 – 2.8 2.0 4.9 18.3 Line Staff/La Vanguardia 29 May–7 Jun 1986 8,871 74.3–77.8 39.3–45.0 19.2–23.7 – 5.4–5.7 11.1–14.0 1.8–1.9??? – 8.0–9.2 0.9–1.0 – 5.5–7.6 15.6–25.8 Perfiles 2–3 Jun 1986 4,480? 40.3 19.7 – 4.9 2.5 2.2 0.8 0.4 0.6 – 12.9 – – 6.0 20.6 ECO/Cadena SER 2–3 Jun 1986 1,311 73 40.3 26.5 – 5.4 8.4 1.8 1.2 – 0.5 – 3.6 – 1.0 5.9 13.8 TC–Sigma Dos/Actualidad 30 May–2 Jun 1986 1,111? 38.5 26.5 – 4.9 8.7 1.9 1.0 – 0.4 – 4.7 – 2.8 6.6 12.0 Perfiles 26–27 May 1986 4,265? 40.2 23.1 – 4.6 2.8 2.0 0.5 0.4 0.3 – 12.8 – – 5.3 17.1 Demoscopia/El País 24–27 May 1986 5,200 72 46.0 25.0 – 6.0 8.0 3.0 1.0 0.3 0.7 – 1.0 – 6.0 21.0 CIS 21–25 May 1986 5,615? 46.5 25.5 – – – 6.0 – – – – – – – – 4.4 21.0 Perfiles 19–20 May 1986 4,330 73.6 42.0 23.4 – 3.9 3.5 1.9 0.6 0.4 0.3 – 11.4 – – 4.1 18.6 ECO/Cadena SER 19 May 1986?? 42.0 29.1 – 5.2 5.3 1.9 0.9 – 0.6 – 3.4 – – 6.7 12.9 Typol/CP 16–18 May 1986 5,000??? – – 5.0 – – – – – 5.8 – – –? Sigma Dos/Actualidad 10–14 May 1986 1,111? 38.4 25.8 – 4.5 7.2 1.9 1.0 – 0.4 – 4.9 – – 8.4 12.6 Typol 24 Apr–10 May 1986 5,000? 43.5 28.6 – 5.8 2.1 0.9 0.4 0.9 – 9.7 – – 3.9 14.9 Emopública/Cambio 16 23–25 Apr 1986 1,200? 44.3 27.7 – 7.4 3.8 6.5 0.8 0.9 – 1.0 – 6.0 – – – 16.6 Emopública/Cambio 16 4 Mar 1986 1,300? 40.7 29.7 – – – – – – – – – – – – – 11.0 Emopública/Cambio 16 13 Jan 1986?? 43.0 27.1 – – – – – – – – – – – – – 15.9 Sofemasa/La Vanguardia 16 Nov–1 Dec 1985 1,849? 50.5 19.8 – 7.4 3.8 4.0 2.3 – – – 0.8 1.5 – – – 30.7 AP 14 Nov 1985 6,500? 40.0 32.5 – 4.0–5.0 3.0 6.0–7.0 2.0 – – – – 1.0–2.0 – – – 7.5 Iope–Etmar/Mediterráneo 5–23 Jul 1985 1,600? 44.9 24.6 – 5.0 3.9 9.2 1.8 – – – 0.7 2.7 1.6 – – 20.3 Sofemasa/CEOE 24 Jun–7 Jul 1985 23,000? 46.0 28.0 – – – 5.6 – – – – – <1.0 – – – 18.0 Typol/AP 26 Jun 1985 2,580? 41.4 31.7 – 4.4 3.1 6.1 2.2 – – – – 4.5 – – – 9.7 Sigma Dos/Actualidad 4–11 Jun 1985 1,111? 35.4 27.0 – 5.9 3.0 5.2 2.1 0.9 – 0.6 – 0.8 – – – 8.4 Sigma Dos/Actualidad 7–14 May 1985?? 33.7 25.9 – 6.1 2.9 5.1 1.9 1.0 – 0.5 – 1.3 – – – 7.8 Iope–Etmar/Mediterráneo 1 Mar–23 Apr 1985 1,800? 47.4 25.2 – 4.1 4.6 7.5 1.8 – – – 1.2 1.8 0.2 – – 22.2 ABC 10 Mar 1985 15,000??? –???? – – – –? – – –? Iope–Etmar/Mediterráneo 15 Jan–6 Feb 1985 1,800? 47.8 22.3 – 4.0 4.5 8.0 1.9 – – – 0.8 4.3 0.3 – – 25.5 Iope–Etmar/Mediterráneo 14 Dec–20 Jan 1985 1,800? 45.9 23.6 – 4.7 4.3 7.2 2.1 – – – 1.5 4.5 0.3 – – 22.3 ECO/Cambio 16 11–14 Jan 1985 1,307? 45.0 28.5 – 5.0 4.0 5.0 2.0 – – – – 2.0 – – – 16.5 Gallup 11–30 Nov 1984 1,035? 38.2 26.3 – 5.8 3.9 6.3 2.0 1.0 0.7 0.5 – 8.3 – – – 11.9 AP 31 Oct 1984 1,037? 39.9 31.5 – 6.9 – 2.5 – – – – – – – – – 8.4 TC/Actualidad 22–28 Oct 1984 1,111? 39.2 29.4 – 7.2 4.0 4.0 1.9?? –? – – – – 9.8 Gallup 22 Sep–9 Oct 1984 1,024? 42.9 28.0 – 5.9 3.1 5.7 2.3 0.9 0.7 0.6 – 5.2 – – – 14.9 Iope–Etmar/Mediterráneo 14 Sep–8 Oct 1984 1,852? 44.8 24.4 – 5.0 5.0 7.7 1.8 – – – 0.9 2.9 0.6 – – 20.4 TC/Actualidad 17–23 Sep 1984?? 37.1 28.2 – 5.6 3.0 3.6 1.9 0.8 – 0.6 – – – – – 8.9 TC/Actualidad 30 Jul–5 Aug 1984 1,111? 40.6 30.4 – 6.5 3.1 3.5 2.0 0.7 – 0.5 – – – – – 10.2 ECO/Cambio 16 28 Jul 1984?? 41.1 31.6 – – – – – – – – – – – – – 9.5 TC/Actualidad 9–15 Jul 1984?? 44.3 27.4 – 4.9 3.1 2.4 2.0 1.0 – 0.6 – – – – – 16.9 TC/Actualidad 18–24 Jun 1984?? 42.0 29.4 – 5.4 3.0 3.5 2.0 0.8 – 0.6 – – – – – 12.6 Gallup 12–24 Mar 1984 1,031? 42.3 27.1 – 6.1 3.7 5.3 1.9 1.0 1.0 0.6 – – – – – 15.2 Iope–Etmar/Mediterráneo 2–27 Nov 1983 2,200? 47.5 26.9 – 4.4 4.3 4.6 1.9 – – – 0.5 3.1 – – – 20.6 1983 local elections 8 May 1983 66.9 43.0 26.4 – 8.2 4.2 1.8 2.2 0.9 0.5 0.4 0.6 0.8 – – – 21.7 Aresco/ABC 26–29 Apr 1983 1,440 69.1 45.3 30.2 – 5.3 3.8 1.6 2.4 – – – – 0.7 – – – 15.1 Metra Seis/Tiempo 11–15 Apr 1983 1,111? 49.9 17.6 – 4.2 – 1.3 – – – – – – – – – 32.3 Alef/Grupo 16 21–26 Feb 1983 1,700? 49.7 17.9 – 3.3 2.9 1.3 1.2 0.8 0.7 0.6 – – – – – 31.8 Metra Seis/Agencia Lid 22–24 Feb 1983 1,002? 50.6 15.7 2.2 3.3 2.0 0.5 1.2 0.6 – 0.5 – – – – – 34.9 1982 general election 28 Oct 1982 80.0 48.1 26.4 6.8 4.1 3.7 2.9 1.9 1.0 0.7 0.5 0.4 – – – – 16.6

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