Opinion polling for the 1977 Spanish general election

Last updated July 10, 2024

In the run up to the 1977 Spanish general election, various organisations carried out opinion polling to gauge voting intention in Spain during the term of the Constituent Cortes Generales. Results of such polls are displayed in this article. The date range for these opinion polls is to the day the election was held, on 15 June 1977.

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	EC	ASD	FDI			ESB	Lead
Polling firm/Commissioner	Fieldwork date	Sample size	Turnout															Lead

1977 general election	15 Jun 1977	—	78.8	34.4 165	29.3 118	9.3 20	8.3 16	4.5 6	2.8 11	2.3 2	1.6 8	0.8 1	0.7 0	0.7 0	0.6 0	0.3 1	0.2 0	5.1

ANA/Europa Press^[1]	14 Jun 1977	1,825	80	31.4 143	26.0 104	8.1 20	9.5 32	6.6 14	1.7 6	6.4 17	2.4 8	–	–	–	–	–	–	5.4
ICSA–Gallup/Ya^{[lower-alpha 1]}^[2]	14 Jun 1977	1,200	91.8	28.9	32.6	6.5	6.4	5.4	2.7	4.4	2.0	–	0.7	3.4	0.6	–	–	3.7
Tecnia/Informaciones^[3]	11–12 Jun 1977	1,500	64.8	29.5	27.3	9.5	6.5	7.7	2.9	6.1	1.8	–	1.2	1.2	0.7	1.1	0.2	2.2
Alef/Cuadernos para el Diálogo^[4]	11 Jun 1977	?	?	33.7	20.0	10.8	11.3	8.0	–	11.4	–	–	–	3.0	1.8	–	–	13.7
Sofemasa/El País^{[lower-alpha 1]}^[5]^[6]^[7]	6–8 Jun 1977	15,875	91.7	34.0 141	27.0 121	8.1 28	9.2 25	5.4 11	1.5 10	2.6 3	1.0 6	? 1	1.0 1	0.7 0	0.7 0	? 1	? 2	7.0
ANA/Europa Press^[8]^[9]^[4]	28 May–2 Jun 1977	5,100	?	30.0 130/153	20.7 81/99	7.2 14/20	11.3 42/58	6.2 10/17	2.3 6/10	6.8 13/27	1.3 5/8	–	2.3 1/4	1.5 1/2	–	0.4 2	–	9.3
Metra Seis/La Vanguardia^[10]	28 May–1 Jun 1977	1,700	83.1	34.4	24.2	9.7	4.9	6.8	–	3.1	–	–	–	–	–	–	–	10.2
Metra Seis/Diario 16^[11]	28 May–1 Jun 1977	1,700	76.8	40.5	20.7	7.8	8.3	6.1	3.1	5.6	1.4	–	–	3.5	–	–	–	19.8
Sofemasa/El País^{[lower-alpha 1]}^[12]	18–19 May 1977	1,638	85.2	33.8	22.5	9.7	9.6	6.6	–	5.0	2.7	–	2.9	2.4	1.2	–	–	11.3
Sofemasa/El País^{[lower-alpha 1]}^[13]	4–5 May 1977	1,595	85.1	33.5	21.9	8.8	7.9	9.0	–	1.8	2.5	–	0.5	1.4	0.4	–	–	11.6

Voting preferences

The table below lists raw, unweighted voting preferences.

Polling firm/Commissioner	Fieldwork date	Sample size								PNV	EC	ASD	FDI		?	N	Lead
Polling firm/Commissioner	Fieldwork date	Sample size													?	N	Lead

1977 general election	15 Jun 1977	—	26.8	22.8	7.3	6.4	3.5	2.2	1.8	1.3	0.6	0.5	0.5	0.4	—	21.2	4.0

ICSA–Gallup/Ya^[2]	14 Jun 1977	1,200	23.5	26.5	5.3	5.2	4.4	2.2	3.6	1.7	–	0.6	2.8	0.5	16.1	2.5	3.0
Sofemasa/El País^[5]	6–8 Jun 1977	15,875	27.7	22.0	6.6	7.5	4.4	1.2	2.1	0.8	0.6	0.8	–	0.6	15.0	3.6	5.7
CIS^[14]	1 Jun 1977	27,260	12.9	12.6	4.3	4.1	2.7	1.8	2.4	0.8	0.4	–	–	–	36.5	6.3	0.3
Sofemasa/El País^[12]	18–19 May 1977	1,638	20.1	13.4	5.8	5.7	3.9	–	3.0	1.6	–	1.7	–	0.7	34.9	5.6	6.7
Sofemasa/El País^[13]	4–5 May 1977	1,595	19.0	12.4	5.0	4.5	5.1	–	1.0	1.4	–	0.3	–	0.2	38.8	4.5	6.6

Notes

1 2 3 4 Undecided and/or abstentionists excluded.

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References

↑ "La Unión de Centro Democrático y el PSOE, a gran distancia de los demás grupos políticos" (PDF). Informaciones (in Spanish). 15 June 1977.
1 2 "El PSOE, en cabeza" (PDF). Pueblo (in Spanish). 14 June 1977.
↑ "La tercera parte de los españoles, indecisos" (PDF). Informaciones (in Spanish). 14 June 1977.
1 2 "Aprendiendo a votar". Diario 16 (in Spanish). 15 June 1977. Archived from the original on 16 February 2017. Retrieved 12 June 2016.
1 2 "Fuerte avance de la izquierda". El País (in Spanish). 12 June 1977.
↑ "Centristas y socialistas, al copo en el Congreso" (PDF). El País (in Spanish). 12 June 1977.
↑ "La participación electoral será masiva" (PDF). El País (in Spanish). 12 June 1977.
↑ "Según una nueva encuesta, 147 escaños serían para el centro" (PDF). Ya (in Spanish). 12 June 1977.
↑ "Gana el Centro, seguido del PSOE" (PDF). El País (in Spanish). 13 June 1977.
↑ "El Centro es favorito". La Vanguardia (in Spanish). 10 June 1977.
↑ "El Centro es favorito". Diario 16 (in Spanish). 9 June 1977. Archived from the original on 16 February 2017. Retrieved 13 June 2016.
1 2 "Confirmada la ventaja de UCD y PSOE". El País (in Spanish). 24 May 1977.
1 2 "Ventaja del centro y los socialistas en la carrera electoral". El País (in Spanish). 10 May 1977.
↑ "Preelectoral elecciones generales 1977 (III) (Estudio nº 1135. Junio 1977)" (PDF). CIS (in Spanish). 1 June 1977.

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[fn1-2] 1 2 3 4 Undecided and/or abstentionists excluded.

[1] "La Unión de Centro Democrático y el PSOE, a gran distancia de los demás grupos políticos" (PDF). Informaciones (in Spanish). 15 June 1977.

[ICSAJun77-3] 1 2 "El PSOE, en cabeza" (PDF). Pueblo (in Spanish). 14 June 1977.

[4] "La tercera parte de los españoles, indecisos" (PDF). Informaciones (in Spanish). 14 June 1977.

[D16Jun77-5] 1 2 "Aprendiendo a votar". Diario 16 (in Spanish). 15 June 1977. Archived from the original on 16 February 2017. Retrieved 12 June 2016.

[SofeJun77-6] 1 2 "Fuerte avance de la izquierda". El País (in Spanish). 12 June 1977.

[7] "Centristas y socialistas, al copo en el Congreso" (PDF). El País (in Spanish). 12 June 1977.

[8] "La participación electoral será masiva" (PDF). El País (in Spanish). 12 June 1977.

[9] "Según una nueva encuesta, 147 escaños serían para el centro" (PDF). Ya (in Spanish). 12 June 1977.

[10] "Gana el Centro, seguido del PSOE" (PDF). El País (in Spanish). 13 June 1977.

[11] "El Centro es favorito". La Vanguardia (in Spanish). 10 June 1977.

[12] "El Centro es favorito". Diario 16 (in Spanish). 9 June 1977. Archived from the original on 16 February 2017. Retrieved 13 June 2016.

[SofeMay77b-13] 1 2 "Confirmada la ventaja de UCD y PSOE". El País (in Spanish). 24 May 1977.

[SofeMay77a-14] 1 2 "Ventaja del centro y los socialistas en la carrera electoral". El País (in Spanish). 10 May 1977.

[15] "Preelectoral elecciones generales 1977 (III) (Estudio nº 1135. Junio 1977)" (PDF). CIS (in Spanish). 1 June 1977.

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