# Opinion polling for the 2000 Spanish general election

In the run up to the 2000 Spanish general election, various organisations carried out opinion polling to gauge voting intention in Spain during the term of the 6th 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 3 March 1996, to the day the next election was held, on 12 March 2000.
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.

##### Color key

Poll conducted after legal ban on opinion polls  Exit poll
| Polling firm/Commissioner | Fieldwork date | Sample size | Turnout | | | | | PNV | | BNG | | | NI/IC | Lead |
| 2000 general election | 12 Mar 2000 | — | 68.7 | 44.5 183 | 34.2 125 | 5.4 8 | 4.2 15 | 1.5 7 | 1.1 4 | 1.3 3 | – | 0.8 1 | 0.5 1 | 10.3 |
| Eco Consulting/RTVE | 12 Mar 2000 | ? | ? | 42.1 173/180 | 32.9 122/126 | 7.5 10/13 | 4.0 14/16 | 1.9 8/9 | 0.9 4 | 1.6 4/6 | – | 1.0 2 | 0.5 1 | 9.2 |
| Eco Consulting/RTVE | 12 Mar 2000 | ? | ? | 41.6 168/173 | 34.6 130/134 | 7.0 10/12 | 4.0 14/16 | 1.6 7 | 0.9 4 | 1.5 5/6 | – | 0.9 1 | 0.4 1 | 7.0 |
| Sigma Dos/Antena 3 | 12 Mar 2000 | ? | ? | 41.1 162/173 | 36.8 133/143 | 6.6 9/11 | 4.3 14/15 | 1.8 7 | 1.1 4 | 1.3 4/5 | – | 1.1 2 | ? 0/1 | 4.3 |
| Opitel/Tele 5 | 12 Mar 2000 | ? | ? | 42.0 168/173 | 37.0 131/136 | 7.5 12/13 | 4.5 15/16 | 1.5 7/8 | ? 4 | ? 4 | – | ? 1/2 | – | 5.0 |
| Gallup | 8–11 Mar 2000 | 1,228 | ? | 42.7 173/178 | 33.9 128/133 | 7.8 11/13 | 4.3 14/15 | 1.6 6/7 | 0.7 3/5 | 1.5 4/5 | – | 0.7 1 | – | 8.8 |
| CIS | 7 Mar 2000 | ? | 78.5 | 43.7 176 | 33.7 123 | 8.7 17 | 4.2 14 | 1.7 7 | 0.9 3 | 1.3 4 | – | 0.9 1 | 1.2 2 | 10.0 |
| La Vanguardia | 5 Mar 2000 | ? | ? | 43.2 175/180 | 35.3 128/136 | – | – | – | – | – | – | – | – | 7.9 |
| Sondaxe/Diario 16 | 5 Mar 2000 | 12,001 | ? | 42.1 163/170 | 37.4 136/143 | 8.1 11/14 | 4.3 13/15 | 1.6 7 | 1.1 3/4 | 1.4 3/5 | – | 1.1 0/1 | ? 1/2 | 4.7 |
| La Vanguardia | 3 Mar 2000 | ? | ? | 45.7 183/185 | 33.2 123/128 | 6.7 ? | 4.2 ? | 1.6 ? | 0.6 ? | 1.1 ? | – | 0.9 ? | 1.1 ? | 12.5 |
| Demoscopia/El País | 25 Feb–2 Mar 2000 | 15,000 | 74 | 41.7 165/171 | 37.1 131/139 | 7.3 9/13 | 4.1 14/15 | 1.4 6/7 | 1.0 4 | 1.3 4/5 | – | 1.0 1/2 | 0.9 1 | 4.6 |
| Vox Pública/El Periódico | 28 Feb–1 Mar 2000 | 2,300 | ? | 44.5 | 33.7 | 6.2 | 4.4 | 1.5 | 1.0 | 1.8 | – | – | – | 10.8 |
| Vox Pública/El Periódico | 28 Feb–1 Mar 2000 | 2,300 | 65–70 | 41.7 165/170 | 37.6 135/140 | 7.5 9/12 | 4.2 13/14 | 1.6 7/8 | 1.2 4/5 | 1.7 4/5 | – | 0.9 1 | – | 4.1 |
| Metra Seis/Colpisa | 21 Feb–1 Mar 2000 | 2,500 | 74–76 | 41.5 162/170 | 36.7 132/142 | 8.0 12/13 | 4.4 15/16 | 1.4 7 | 1.0 4/5 | 1.3 4/5 | – | 0.7 1 | – | 4.8 |
| Ipsos–Eco/ABC | 25–29 Feb 2000 | 15,600 | 74.4 | 40.5 158/164 | 36.7 138/144 | 7.3 9/12 | 4.3 15/16 | 1.4 6/7 | 1.0 4 | 1.2 3/5 | – | 0.8 1 | 0.6 1 | 3.6 |
| Sigma Dos/El Mundo | 21–29 Feb 2000 | 12,000 | ? | 41.9 164/170 | 37.3 137/143 | 6.5 9/11 | 4.5 16 | 1.7 6/7 | 0.9 4/5 | 1.3 3/5 | – | 0.8 1 | – | 4.6 |
| Opina/La Vanguardia | 24–28 Feb 2000 | 3,000 | ? | 41.8 166/170 | 37.2 136/140 | 8.0 12/14 | 4.2 14/15 | 1.3 6 | 1.0 4 | 1.0 3 | – | 1.0 1/2 | 0.6 0/1 | 4.6 |
| CIS | 11–28 Feb 2000 | 24,040 | 72.0 | 41.6 163/168 | 36.6 138/143 | 7.4 9/11 | 4.1 14/15 | 1.3 7 | 0.8 3/4 | 1.1 4/5 | – | 0.9 1 | 0.7 1/2 | 5.0 |
| Gallup | 7–28 Feb 2000 | 2,029 | 73.8 | 42.4 | 37.4 | 6.9 | 4.2 | 1.5 | – | – | – | – | – | 5.0 |
| Sondaxe/Diario 16 | 27 Feb 2000 | 5,455 | ? | 42.2 | 36.4 | 9.1 | 5.1 | 1.6 | 0.8 | 1.3 | – | – | – | 5.8 |
| Ipsos–Eco/ABC | 11–15 Feb 2000 | 2,232 | ? | 41.8 | 38.2 | 7.3 | 4.5 | 1.4 | – | 1.1 | – | – | – | 3.6 |
| Demoscopia/El País | 13 Feb 2000 | 2,000 | 74–76 | 41.6 | 37.3 | 7.5 | 4.4 | 1.4 | – | 1.1 | – | – | – | 4.3 |
| Vox Pública/El Periódico | 5–8 Feb 2000 | 2,300 | ? | 46.3 | 32.3 | 7.1 | 3.7 | 1.6 | 0.7 | 1.2 | – | – | – | 14.0 |
| Vox Pública/El Periódico | 5–8 Feb 2000 | 2,300 | 65–70 | 42.6 | 36.6 | 7.5 | 4.2 | 1.9 | – | – | – | – | – | 6.0 |
| Sigma Dos/El Mundo | 6 Feb 2000 | ? | ? | 42.9 | 36.2 | 7.8 | 4.4 | 1.3 | – | – | – | – | – | 6.7 |
| La Vanguardia | 30 Jan 2000 | ? | ? | 44.7 180/182 | 35.1 126/131 | – | – | – | – | – | – | – | – | 9.6 |
| Opina/La Vanguardia | 22–25 Jan 2000 | 3,000 | ? | 42.0 157/160 | 40.0 145/148 | 8.0 15/16 | 4.0 14 | 1.2 4/5 | 1.0 4/5 | 0.8 3 | – | 0.8 0/1 | 0.5 0 | 2.0 |
| Opina/La Vanguardia | 22–25 Jan 2000 | 3,000 | ? | 42.5 164/168 | 37.0 138/143 | 7.5 14/15 | 4.3 14/15 | 1.3 5 | 1.5 5 | 1.3 3/4 | – | 1.0 1 | 0.8 0/1 | 5.5 |
| Gallup | 3–24 Jan 2000 | ? | ? | 40.7 | 37.1 | 7.0 | 4.1 | 1.4 | – | – | – | – | – | 3.6 |
| Vox Pública/El Periódico | 11–18 Jan 2000 | 2,300 | ? | 45.0 | 33.3 | 5.8 | 4.3 | 1.2 | 0.7 | 1.3 | – | – | – | 11.7 |
| Vox Pública/El Periódico | 11–18 Jan 2000 | 2,300 | 65–70 | 43.0 | 38.0 | 6.5 | 4.2 | 1.3 | – | – | – | – | – | 5.0 |
| Sigma Dos/El Mundo | 23–30 Dec 1999 | 12,000 | ? | 42.5 167/174 | 36.8 137/144 | 6.3 9/10 | 4.4 15/16 | 1.4 6 | 0.9 3/5 | 1.2 3 | – | 0.6 1 | – | 5.7 |
| Gallup | 9–24 Dec 1999 | ? | ? | 38.6 | 38.2 | 6.8 | 4.5 | 1.2 | – | – | – | – | – | 0.4 |
| Demoscopia/El País | 15–22 Dec 1999 | ? | 73 | 40.9 | 36.5 | 6.7 | 4.1 | 1.5 | – | 1.4 | – | – | – | 4.4 |
| Sondaxe/Diario 16 | 5 Dec 1999 | 2,500 | ? | 43.8 | 36.8 | 7.9 | 4.0 | 2.0 | – | – | – | – | – | 7.0 |
| Gallup | 8–29 Nov 1999 | 2,001 | ? | 39.0 | 38.4 | 6.3 | 4.2 | 1.3 | – | – | – | – | – | 0.6 |
| La Vanguardia | 28 Nov 1999 | ? | ? | 42.2 175/179 | 34.2 128/135 | – | – | – | – | – | – | – | – | 8.0 |
| La Vanguardia | 25 Nov 1999 | ? | ? | 41.1 175/176 | 34.1 130/135 | 5.6 ? | 4.3 ? | 1.4 ? | 0.6 ? | 1.0 ? | 1.0 ? | 1.3 ? | 0.6 ? | 7.0 |
| Opina/La Vanguardia | 19–22 Nov 1999 | 3,000 | ? | 41.5 163/167 | 36.0 132/140 | 8.0 13/15 | 4.0 14/15 | 1.5 5/6 | 1.5 5 | 1.5 3/4 | 0.5 1/2 | 1.0 1 | 1.0 1 | 5.5 |
| CIS | 22–26 Oct 1999 | 2,496 | ? | 40.6 167 | 35.8 139 | 6.8 ? | 4.5 ? | 1.2 ? | – | – | – | – | – | 4.8 |
| Intercampo/GETS | 22 Sep–7 Oct 1999 | ? | ? | 41.0 | 36.5 | 10.3 | 4.4 | 1.2 | – | – | – | – | – | 4.5 |
| Metra Seis/Colpisa | 27 Sep–1 Oct 1999 | 1,680 | ? | 41.8 164/170 | 36.8 136/142 | 7.4 11/13 | 4.5 14/16 | 1.2 5 | – | – | – | – | – | 5.0 |
| Sigma Dos/El Mundo | 28–30 Sep 1999 | 1,000 | ? | 42.2 165/170 | 37.0 135/140 | 7.1 ? | 4.5 ? | 1.3 ? | – | – | – | – | – | 5.2 |
| Gallup | 2–27 Sep 1999 | 2,029 | 77.2 | 40.7 | 37.2 | 9.8 | 4.3 | 1.0 | – | – | – | – | – | 3.5 |
| Demoscopia/El País | 13–15 Sep 1999 | 1,809 | 75 | 40.8 | 36.7 | 7.0 | 4.8 | 1.3 | – | 1.6 | – | – | – | 4.1 |
| Eco Consulting/ABC | 9–10 Sep 1999 | 1,000 | ? | 41.4 | 35.8 | 8.8 | 4.3 | 1.5 | – | 1.4 | – | – | – | 5.6 |
| La Vanguardia | 26 Aug 1999 | ? | ? | 41.8 175/176 | 34.7 130/135 | 5.8 ? | 3.9 ? | 1.3 ? | 1.1 ? | 1.6 ? | 0.9 ? | 1.3 ? | 1.3 ? | 7.1 |
| CIS | 9–15 Jul 1999 | 2,490 | ? | 40.7 169 | 35.8 140 | 6.6 ? | 4.6 ? | 1.2 ? | – | – | – | – | – | 4.9 |
| DYM/El Periódico | 5–12 Jul 1999 | 2,534 | 69.3 | 41.8 | 37.1 | 7.2 | 4.9 | 1.1 | – | – | 0.7 | 0.8 | 1.0 | 4.7 |
| Gallup | 9–21 Jun 1999 | ? | ? | 40.1 | 38.1 | 9.5 | 4.0 | 1.2 | – | – | – | – | – | 2.0 |
| 1999 EP election | 13 Jun 1999 | — | 63.0 | 39.7 162 | 35.3 135 | 5.8 9 | 4.0 17 | 1.9 7 | 1.3 5 | 1.6 5 | 1.3 4 | 0.8 1 | 0.7 2 | 4.4 |
| 1999 local elections | 13 Jun 1999 | — | 64.0 | 34.4 | 34.3 | 6.5 | 3.6 | 1.3 | 1.3 | 1.4 | 1.3 | 1.1 | 1.1 | 0.1 |
| Demoscopia/El País | 26 May–1 Jun 1999 | 17,500 | ? | 41.5 | 37.0 | 7.7 | 4.4 | – | – | – | – | – | – | 4.5 |
| Metra Seis/Colpisa | 14–20 May 1999 | 1,200 | ? | 41.7 168/176 | 35.3 127/133 | 8.8 15/18 | 4.7 16 | 1.2 5 | – | – | – | – | – | 6.4 |
| CIS | 24–28 Apr 1999 | 2,499 | ? | 41.0 169 | 35.9 138 | 8.9 ? | 4.6 ? | 1.3 ? | – | – | – | – | – | 5.1 |
| DYM/El Periódico | 9–16 Apr 1999 | 3,019 | 65.3 | 42.9 | 34.1 | 10.1 | 4.6 | 1.5 | – | – | 0.3 | 0.9 | 0.9 | 8.8 |
| Demoscopia/El País | 12–14 Apr 1999 | 1,200 | ? | 41.1 | 31.6 | 8.1 | 5.4 | – | – | – | – | – | – | 9.5 |
| Metra Seis/Colpisa | 18–22 Feb 1999 | 1,200 | ? | 42.5 169/176 | 35.7 130/137 | 7.6 12/14 | 4.6 15/16 | 1.3 5/7 | – | – | – | – | – | 6.8 |
| Eco Consulting/ABC | 18–20 Feb 1999 | 1,500 | ? | 42.1 | 35.0 | 10.0 | 4.5 | 1.5 | – | 1.2 | – | – | – | 7.1 |
| La Vanguardia | 31 Jan 1999 | ? | ? | 41.5 170/171 | 35.9 136/140 | – | – | – | – | – | – | – | – | 5.6 |
| CIS | 27–31 Jan 1999 | 2,493 | ? | 41.1 167/175 | 35.4 127/136 | 9.2 14/16 | 4.5 15/16 | 1.3 5/6 | – | – | – | – | – | 5.7 |
| Opina/La Vanguardia | 21–23 Jan 1999 | 1,000 | ? | 42.0 166/174 | 37.0 133/141 | 7.5 12/13 | 4.4 15/16 | 0.8 3/5 | – | – | – | 0.8 ? | 1.5 ? | 5.0 |
| DYM/El Periódico | 11–16 Jan 1999 | 2,513 | 67.9 | 42.6 | 33.9 | 8.5 | 4.5 | 1.1 | 0.9 | 1.6 | 0.8 | 0.7 | 0.8 | 8.7 |
| Sigma Dos/El Mundo | 26–27 Dec 1998 | 1,000 | ? | 42.9 | 36.1 | 7.7 | 4.5 | 1.3 | – | – | – | – | – | 6.8 |
| Gallup | 9–21 Dec 1998 | 2,017 | ? | 40.6 | 36.4 | 9.9 | 4.7 | 1.4 | – | – | – | – | – | 4.2 |
| Metra Seis/Colpisa | 9–14 Dec 1998 | 1,200 | ? | 42.0 167/174 | 36.8 133/140 | 8.2 12/15 | 4.4 14/16 | 1.2 5 | – | – | – | – | – | 5.2 |
| Eco Consulting/ABC | 17–18 Nov 1998 | 1,001 | ? | 40.6 | 36.5 | 9.8 | 4.5 | 1.7 | – | 1.0 | – | – | – | 4.1 |
| Opina/La Vanguardia | 13–14 Nov 1998 | 1,000 | ? | 41.5 166/173 | 37.5 135/143 | 6.5 9 | 4.8 15/17 | 0.8 5 | – | – | – | 0.8 ? | 1.0 ? | 4.0 |
| La Vanguardia | 1 Nov 1998 | ? | ? | 41.3 171/173 | 34.7 131/133 | 7.1 12 | 4.6 16 | 1.4 6 | – | – | 0.9 3 | – | – | 6.6 |
| La Vanguardia | 1 Nov 1998 | ? | ? | 40.1 172/174 | 32.8 128/131 | 7.1 13 | 4.6 17 | 1.4 6 | – | – | 0.9 3 | – | – | 7.3 |
| La Vanguardia | 1 Nov 1998 | ? | ? | 42.5 169/172 | 36.7 134/136 | 7.1 11/12 | 4.6 15/16 | 1.4 6 | – | – | 0.9 2/3 | – | – | 5.8 |
| CIS | 26–31 Oct 1998 | 2,490 | 77.1 | 40.9 165 | 36.6 140 | 9.1 ? | 4.2 ? | 1.3 ? | – | – | – | – | – | 4.3 |
| Intercampo/GETS | 23 Sep–8 Oct 1998 | ? | ? | 38.3 | 39.8 | 8.9 | 4.8 | 1.5 | – | – | – | – | – | 1.5 |
| Vox Pública/El Periódico | 28 Sep–3 Oct 1998 | 1,992 | 66–70 | 38.1 | 38.1 | 10.7 | 4.2 | 1.2 | – | – | – | 0.6 | | Tie |
| Demoscopia/El País | 28–30 Sep 1998 | 1,500 | ? | 40.9 | 35.9 | 10.1 | 3.9 | – | – | – | – | – | – | 5.0 |
| DECO/PSOE | 16–30 Sep 1998 | 7,470 | ? | 38.6 | 39.5 | 8.2 | – | – | – | – | – | – | – | 0.9 |
| Metra Seis/Colpisa | 16–21 Sep 1998 | 1,200 | ? | 41.3 163/170 | 37.3 134/142 | 8.5 13/16 | 4.4 14/16 | 1.4 5/7 | – | – | – | – | – | 4.0 |
| Gallup | 9–21 Sep 1998 | ? | ? | 37.6 | 39.4 | 9.6 | 4.8 | 1.4 | – | – | – | – | – | 1.8 |
| Sigma Dos/El Mundo | 28 Aug–3 Sep 1998 | 14,565 | ? | 40.4 164 | 37.8 139 | 9.1 18 | 4.3 14 | 1.3 6 | 0.7 3 | 0.9 2 | 0.7 2 | 0.5 0 | – | 2.6 |
| CIS | 9–13 Jul 1998 | 2,486 | ? | 38.4 156 | 37.9 147 | 9.3 ? | 4.5 ? | 1.3 ? | – | – | – | – | – | 0.5 |
| Demoscopia/El País | 5–8 Jul 1998 | 1,200 | ? | 37.9 | 35.8 | 8.8 | 4.2 | – | – | – | – | – | – | 2.1 |
| Vox Pública/El Periódico | 15–17 Jun 1998 | 1,992 | 66.3 | 38.5 | 37.6 | 9.3 | 4.3 | 1.8 | – | – | – | 0.6 | | 0.9 |
| Gallup | 13–25 May 1998 | ? | ? | 37.8 | 40.6 | 8.6 | 4.2 | 1.3 | – | – | – | – | – | 2.8 |
| ASEP | 18–22 May 1998 | 1,205 | 75.0 | 40.1 | 36.8 | 9.3 | – | – | – | – | – | – | – | 3.3 |
| Opina/La Vanguardia | 13 May 1998 | 1,000 | ? | 40.0 163/165 | 38.0 142/143 | 7.0 10/11 | 5.0 17 | 1.0 5 | – | – | – | 0.8 ? | 1.0 ? | 2.0 |
| Demoscopia/El País | 4–6 May 1998 | 1,200 | ? | 36.6 | 38.2 | 7.3 | 4.6 | 1.3 | – | – | – | – | – | 1.6 |
| La Vanguardia | 2 May 1998 | ? | ? | 38.8 152/154 | 39.4 149/150 | 8.7 14/15 | – | – | – | – | – | – | – | 0.6 |
| Vox Pública/El Periódico | 27–29 Apr 1998 | 1,200 | 61–67 | 36.2 | 39.4 | 9.4 | 3.7 | 2.2 | – | – | – | 0.4 | – | 3.2 |
| CIS | 25–29 Apr 1998 | 2,498 | ? | 37.1 149/151 | 38.9 152/155 | 9.0 14/15 | 4.9 16 | 1.3 5 | – | – | – | – | – | 1.8 |
| Sigma Dos/El Mundo | 25–27 Apr 1998 | 1,000 | ? | 40.3 | 38.6 | 8.4 | 4.5 | 1.2 | – | – | – | – | – | 1.7 |
| ASEP | 20–24 Apr 1998 | 1,204 | ? | 36.2 | 38.9 | – | – | – | – | – | – | – | – | 2.7 |
| Metra Seis/Colpisa | 13–15 Apr 1998 | 1,200 | ? | 41.2 163/168 | 37.5 136/142 | 8.5 13/16 | 4.5 15/16 | 1.3 5/6 | – | – | – | – | – | 3.7 |
| Gallup | 11–23 Mar 1998 | ? | ? | 38.3 | 38.3 | 9.4 | 4.6 | 1.2 | – | – | – | – | – | Tie |
| ASEP | 16–20 Mar 1998 | 1,209 | ? | 38.5 | 37.3 | – | – | – | – | – | – | – | – | 1.2 |
| DECO/PSOE | 19 Mar 1998 | 2,000 | ? | 38.0 | 39.0 | – | – | – | – | – | – | – | – | 1.0 |
| DECO/PSOE | 23 Feb 1998 | 2,000 | ? | 40.1 | 38.3 | – | – | – | – | – | – | – | – | 1.8 |
| ASEP | 16–20 Feb 1998 | 1,213 | ? | 39.0 | 36.0 | – | – | – | – | – | – | – | – | 3.0 |
| CIS | 23–27 Jan 1998 | 2,496 | 76.6 | 40.5 164 | 36.4 138 | 9.3 ? | 4.5 ? | 1.3 ? | – | – | – | – | – | 4.1 |
| Opina/La Vanguardia | 23–24 Jan 1998 | 1,000 | ? | 41.0 | 36.0 | 6.5 | 4.8 | 1.0 | – | – | – | 0.8 | 2.0 | 5.0 |
| ASEP | 19–23 Jan 1998 | 1,209 | ? | 41.0 | 34.6 | – | – | – | – | – | – | – | – | 6.4 |
| Metra Seis/Colpisa | 12–14 Jan 1998 | 1,200 | ? | 41.8 166/172 | 36.5 133/138 | 8.6 13/16 | 4.8 16/17 | 1.5 5/7 | – | – | – | – | – | 5.3 |
| Sigma Dos/El Mundo | 27–28 Dec 1997 | 1,000 | ? | 42.1 | 36.4 | 8.5 | 4.4 | 1.3 | – | – | – | – | – | 5.7 |
| Gallup | 10–22 Dec 1997 | ? | ? | 39.8 | 36.8 | 8.8 | 4.7 | 1.2 | – | – | – | – | – | 3.0 |
| ASEP | 9–13 Dec 1997 | 1,204 | ? | 41.2 | 34.5 | – | – | – | – | – | – | – | – | 6.7 |
| Opina/La Vanguardia | 4–5 Dec 1997 | 1,000 | ? | 40.0 | 37.0 | 6.5 | 4.6 | 0.8 | – | – | – | 0.8 | 2.0 | 3.0 |
| Demoscopia/El País | 30 Nov 1997 | ? | ? | 40.8 | 34.7 | 8.8 | 3.2 | 1.3 | – | – | – | – | – | 6.1 |
| La Vanguardia | 23 Nov 1997 | ? | ? | 39.6 169/171 | 34.2 133/136 | 7.1 12 | 4.6 16 | – | – | – | – | – | – | 5.4 |
| ASEP | 10–15 Nov 1997 | 1,211 | ? | 38.0 | 37.7 | – | – | – | – | – | – | – | – | 0.3 |
| CIS | 24–28 Oct 1997 | 2,496 | 76.8 | 39.6 163 | 36.4 140 | 9.0 ? | 4.6 ? | 1.2 ? | – | – | – | – | – | 3.2 |
| ASEP | 13–18 Oct 1997 | 1,214 | ? | 39.5 | 36.6 | – | – | – | – | – | – | – | – | 2.9 |
| Sigma Dos/El Mundo | 6–9 Oct 1997 | 1,000 | ? | 40.5 | 37.4 | 9.1 | 4.5 | 1.5 | – | – | – | – | – | 3.1 |
| Intercampo/GETS | 24 Sep–9 Oct 1997 | ? | ? | 38.9 | 38.0 | 8.9 | 5.4 | 1.3 | – | – | – | – | – | 0.9 |
| DECO/PSOE | 29 Sep–3 Oct 1997 | ? | ? | 38.5 | 37.7 | 9.3 | – | – | – | – | – | – | – | 0.8 |
| Demoscopia/El País | 1 Oct 1997 | ? | ? | 41.0 | 34.7 | 8.7 | 3.2 | 1.2 | – | – | – | – | – | 6.3 |
| Gallup | 10–22 Sep 1997 | ? | ? | 39.0 | 38.6 | 8.9 | 5.0 | 1.2 | – | – | – | – | – | 0.4 |
| Opina/La Vanguardia | 19–21 Sep 1997 | 1,000 | ? | 40.0 | 38.5 | 8.5 | 5.2 | 1.0 | – | – | – | 0.5 | – | 1.5 |
| ASEP | 15–20 Sep 1997 | 1,218 | ? | 40.8 | 35.8 | – | – | – | – | – | – | – | – | 5.0 |
| Metra Seis/Colpisa | 12–15 Sep 1997 | 1,000 | ? | 41.0 163/167 | 37.2 136/140 | 9.0 14/17 | 4.8 16/17 | 1.5 6/7 | – | – | – | – | – | 3.8 |
| Sigma Dos/El Mundo | 16–17 Jul 1997 | 1,000 | ? | 40.9 | 37.0 | 9.7 | 4.7 | 1.5 | – | – | – | – | – | 3.9 |
| CIS | 11–15 Jul 1997 | 2,495 | 78.5 | 40.3 162 | 38.2 142 | 9.4 ? | 4.3 ? | 1.4 ? | – | – | – | – | – | 2.1 |
| ASEP | 7–11 Jul 1997 | 1,214 | ? | 39.6 | 36.4 | – | – | – | – | – | – | – | – | 3.2 |
| Demoscopia/El País | 7–9 Jul 1997 | 1,200 | ? | 38.1 | 36.4 | 10.5 | 4.3 | 1.3 | – | – | – | – | – | 1.7 |
| DECO/PSOE | 6 Jul 1997 | ? | ? | 40.5 | 37.6 | – | – | – | – | – | – | – | – | 2.9 |
| Gallup | 11–23 Jun 1997 | ? | ? | 40.1 | 37.7 | 10.3 | 4.5 | 1.4 | – | – | – | – | – | 2.4 |
| Opina/La Vanguardia | 14–16 Jun 1997 | 1,000 | ? | 40.0 | 38.0 | 10.5 | 5.0 | 1.0 | – | – | – | 0.5 | – | 2.0 |
| ASEP | 9–14 Jun 1997 | 1,220 | ? | 36.6 | 38.6 | – | – | – | – | – | – | – | – | 2.0 |
| Sigma Dos/El Mundo | 11–13 Jun 1997 | 1,000 | ? | 39.5 | 37.4 | 10.3 | 4.6 | 1.4 | – | – | – | – | – | 2.1 |
| Vox Pública/El Periódico | 20–22 May 1997 | 800 | ? | 40.0 | 35.9 | 10.9 | 3.6 | 1.1 | – | – | – | – | – | 4.1 |
| Opina/La Vanguardia | 19–20 May 1997 | 1,000 | ? | 39.5 | 38.0 | 10.0 | 5.1 | 1.2 | – | – | – | 0.5 | – | 1.5 |
| ASEP | 12–17 May 1997 | 1,221 | ? | 39.2 | 35.8 | – | – | – | – | – | – | – | – | 3.4 |
| CIS | 23–27 Apr 1997 | 2,496 | 78.3 | 39.2 159 | 37.4 139 | 10.5 ? | 4.6 ? | 1.2 ? | – | – | – | – | – | 1.8 |
| Opina/La Vanguardia | 19–20 Apr 1997 | 1,000 | ? | 38.0 | 39.0 | 10.5 | 5.0 | 1.0 | – | – | – | 0.5 | – | 1.0 |
| Sigma Dos/El Mundo | 17–18 Apr 1997 | 1,000 | ? | 38.7 | 38.1 | 10.4 | 4.4 | 1.3 | – | – | – | – | – | 0.6 |
| Gallup | 12–24 Mar 1997 | ? | ? | 37.5 | 39.6 | 10.6 | 4.9 | 1.1 | – | – | – | – | – | 2.1 |
| Opina/La Vanguardia | 7–8 Mar 1997 | 1,000 | ? | 38.0 | 38.5 | 10.0 | 5.0 | 1.0 | – | – | – | 0.5 | – | 0.5 |
| Sigma Dos/El Mundo | 6–7 Feb 1997 | 1,000 | ? | 39.6 | 37.0 | 10.8 | 4.2 | 1.2 | – | – | – | – | – | 2.6 |
| Opina/La Vanguardia | 3–4 Feb 1997 | 1,000 | ? | 38.4 | 37.4 | 10.0 | 5.0 | 1.0 | – | – | – | 1.0 | – | 1.0 |
| CIS | 23–27 Jan 1997 | 2,488 | 76.6 | 38.7 156 | 38.2 145 | 10.0 ? | 4.5 ? | 1.4 ? | – | – | – | – | – | 0.5 |
| ASEP | 13–18 Jan 1997 | 1,212 | 73.4 | 38.0 | 37.6 | 10.4 | – | – | – | – | – | – | – | 0.4 |
| Sigma Dos/El Mundo | 24 Dec–2 Jan 1997 | 1,000 | ? | 38.2 | 39.1 | 10.4 | 4.3 | 1.3 | – | – | – | – | – | 0.9 |
| Gallup | 11–26 Dec 1996 | ? | ? | 35.9 | 39.9 | 11.9 | 4.2 | 1.6 | – | – | – | – | – | 4.0 |
| DECO/PSOE | 25–29 Nov 1996 | 1,500 | ? | 35.4 | 40.0 | 10.5 | 5.0 | – | – | – | – | – | – | 4.6 |
| PP | 26 Nov 1996 | ? | ? | 36.0 | 39.0 | – | – | – | – | – | – | – | – | 3.0 |
| CIS | 26–31 Oct 1996 | 2,498 | 77.4 | 36.3 143 | 39.9 154 | 10.5 ? | 5.1 ? | 1.3 ? | – | – | – | – | – | 3.6 |
| Sigma Dos/El Mundo | 24–25 Oct 1996 | 1,000 | ? | 37.1 | 38.4 | 11.4 | 4.8 | 1.3 | – | – | – | – | – | 1.3 |
| DECO/PSOE | 22 Oct 1996 | 1,400 | ? | 36.1 | 38.7 | 11.4 | 5.0 | – | – | – | – | – | – | 2.6 |
| ASEP | 7–12 Oct 1996 | 1,212 | 79.1 | 34.4 | 38.8 | 11.5 | – | – | – | – | – | – | – | 4.4 |
| Intercampo/GETS | 25 Sep–10 Oct 1996 | ? | ? | 32.7 | 36.5 | 11.7 | 4.9 | 2.2 | – | – | – | – | – | 3.8 |
| Opina/La Vanguardia | 30 Sep–2 Oct 1996 | 1,066 | ? | 37.2 149/150 | 39.1 150/151 | 10.3 19/20 | 4.8 16 | 1.4 5 | – | – | – | 0.5 1 | – | 1.9 |
| Sigma Dos/El Mundo | 7–8 Aug 1996 | 1,000 | ? | 38.8 | 36.8 | 11.3 | 4.4 | 1.4 | – | – | – | – | – | 2.0 |
| CIS | 17–21 Jul 1996 | 2,496 | 79.2 | 38.8 | 37.3 | 11.2 | 4.6 | 1.4 | – | – | – | – | – | 1.5 |
| CIS | 29 May–2 Jun 1996 | 2,496 | 80.4 | 38.6 | 37.3 | 11.3 | 4.9 | 1.4 | – | – | – | – | – | 1.3 |
| Demoscopia/El País | 12 May 1996 | ? | ? | 38.9 | 37.5 | 10.6 | 4.6 | 1.3 | – | – | – | – | – | 1.4 |
| 1996 general election | 3 Mar 1996 | — | 77.4 | 38.8 156 | 37.6 141 | 10.5 21 | 4.6 16 | 1.3 5 | 0.9 4 | 0.9 2 | 0.7 2 | 0.7 1 | – | 1.2 |

#### Voting preferences

The table below lists raw, unweighted voting preferences.
| Polling firm/Commissioner | Fieldwork date | Sample size | | | | | PNV | | NI/IC | ? | N | Lead |
| 2000 general election | 12 Mar 2000 | — | 31.0 | 23.7 | 3.8 | 2.9 | 1.1 | 0.7 | 0.4 | — | 30.0 | 7.3 |
| Vox Pública/El Periódico | 28 Feb–1 Mar 2000 | 2,300 | 30.2 | 21.8 | 4.2 | 2.6 | 0.9 | – | – | 23.6 | 8.8 | 8.4 |
| Opina/La Vanguardia | 24–28 Feb 2000 | 3,000 | 29.1 | 23.8 | – | – | – | – | – | – | – | 5.3 |
| CIS | 11–28 Feb 2000 | 24,040 | 29.5 | 19.3 | 4.3 | 2.7 | 1.0 | 0.4 | 0.7 | 27.2 | 8.3 | 10.2 |
| Gallup | 7–28 Feb 2000 | 2,029 | 26.0 | 24.4 | 4.2 | 1.4 | 0.6 | – | – | 26.7 | 13.5 | 1.6 |
| ASEP | 14–19 Feb 2000 | 1,214 | 32.6 | 23.3 | 6.9 | 6.0* | * | – | – | 16.9 | 7.8 | 9.3 |
| Vox Pública/El Periódico | 5–8 Feb 2000 | 2,300 | 34.3 | 21.0 | 3.9 | 2.4 | 0.8 | – | – | 19.4 | 10.1 | 13.3 |
| CIS | 27–31 Jan 2000 | 2,490 | 30.6 | 18.5 | 3.8 | 1.9 | 1.3 | 0.4 | 0.3 | 28.5 | 8.0 | 12.1 |
| Opina/La Vanguardia | 22–25 Jan 2000 | 3,000 | 29.8 | 22.4 | – | – | – | – | – | – | – | 7.4 |
| Vox Pública/El Periódico | 11–18 Jan 2000 | 2,300 | 33.6 | 22.4 | 3.2 | 2.7 | 0.8 | – | – | 20.8 | 9.3 | 11.2 |
| ASEP | 10–15 Jan 2000 | 1,214 | 31.8 | 26.2 | 6.2 | 4.8* | * | – | – | 17.0 | 8.4 | 5.3 |
| Demoscopia/El País | 15–22 Dec 1999 | ? | 26.3 | 19.6 | 4.6 | 2.3 | – | – | – | 31.4 | 9.1 | 6.7 |
| ASEP | 3–13 Dec 1999 | 1,209 | 29.5 | 27.0 | 5.2 | 5.0* | * | – | – | 15.5 | 11.3 | 2.5 |
| Opina/La Vanguardia | 19–22 Nov 1999 | 3,000 | 28.0 | 22.2 | – | – | – | – | – | – | – | 5.8 |
| ASEP | 8–12 Nov 1999 | 1,211 | 27.2 | 26.9 | 4.4 | 5.2* | * | – | – | 17.5 | 11.3 | 0.3 |
| CIS | 22–26 Oct 1999 | 2,496 | 25.8 | 21.4 | 3.5 | 2.7 | 0.9 | 0.4 | 0.4 | 25.8 | 11.5 | 4.4 |
| ASEP | 11–18 Oct 1999 | 1,213 | 28.0 | 25.5 | 5.6 | 7.0* | * | – | – | 15.7 | 11.9 | 2.5 |
| Gallup | 2–27 Sep 1999 | 2,029 | 19.6 | 26.4 | 3.9 | 1.1 | 0.4 | – | – | 31.6 | 12.7 | 6.8 |
| ASEP | 13–17 Sep 1999 | 1,213 | 29.1 | 24.2 | 5.4 | 6.4* | * | – | – | 18.1 | 9.9 | 4.9 |
| Demoscopia/El País | 13–15 Sep 1999 | 1,809 | 23.8 | 21.3 | 4.4 | 2.5 | – | – | – | 33.4 | 6.7 | 2.5 |
| CIS | 9–15 Jul 1999 | 2,490 | 26.7 | 21.5 | 3.7 | 2.5 | 0.8 | 0.7 | 0.8 | 24.5 | 11.6 | 5.2 |
| DYM/El Periódico | 5–12 Jul 1999 | 2,534 | 27.7 | 20.0 | 2.9 | 2.5 | – | – | – | 23.0 | 15.3 | 7.7 |
| ASEP | 5 Jul 1999 | 1,200 | 28.0 | 26.7 | 6.9 | 4.8* | * | 0.8 | – | 16.6 | 8.8 | 1.3 |
| 1999 EP election | 13 Jun 1999 | — | 25.4 | 22.5 | 3.7 | 2.6 | 1.2 | 0.8 | 0.5 | — | 35.7 | 2.9 |
| ASEP | 7–12 Jun 1999 | 1,223 | 26.7 | 25.8 | 6.3 | 6.1* | * | 0.7 | – | 19.5 | 8.4 | 0.9 |
| Demoscopia/El País | 26 May–1 Jun 1999 | 17,500 | 28.5 | 24.9 | 5.0 | 2.8 | – | – | – | 25.2 | 6.7 | 3.6 |
| ASEP | 10–14 May 1999 | 1,213 | 30.0 | 24.5 | 5.0 | 4.8* | * | 0.3 | – | 19.3 | 8.6 | 5.5 |
| CIS | 24–28 Apr 1999 | 2,499 | 25.5 | 21.0 | 4.5 | 2.8 | 0.7 | 0.4 | 0.6 | 28.8 | 9.1 | 4.5 |
| ASEP | 12–16 Apr 1999 | 1,214 | 24.9 | 23.7 | 5.5 | 5.7* | * | 0.7 | – | 19.7 | 13.0 | 1.2 |
| DYM/El Periódico | 9–16 Apr 1999 | 3,019 | 24.7 | 14.5 | 4.1 | 1.8 | 0.9 | – | 0.4 | 29.5 | 18.9 | 10.2 |
| Demoscopia/El País | 12–14 Apr 1999 | 1,200 | 24.3 | 17.6 | 4.6 | 3.2 | – | – | – | 25.8 | 15.6 | 6.7 |
| ASEP | 8–12 Mar 1999 | 1,207 | 28.9 | 25.4 | 5.9 | 4.4* | * | 0.5 | – | 17.4 | 10.3 | 3.5 |
| ASEP | 8–12 Feb 1999 | 1,218 | 30.7 | 21.3 | 6.0 | 5.8* | * | 0.5 | – | 17.3 | 11.8 | 9.4 |
| Demoscopia/El País | 1–4 Feb 1999 | 1,500 | 27.3 | 19.4 | 3.6 | 1.7 | – | – | – | 25.5 | 15.9 | 7.9 |
| CIS | 27–31 Jan 1999 | 2,493 | 26.7 | 20.3 | 4.8 | 2.7 | 1.0 | 0.5 | 0.5 | 27.2 | 10.1 | 6.4 |
| Opina/La Vanguardia | 21–23 Jan 1999 | 1,000 | 26.6 | 23.0 | – | – | – | – | – | – | – | 3.6 |
| DYM/El Periódico | 11–16 Jan 1999 | 2,513 | 28.0 | 17.0 | 3.3 | 2.1 | 0.7 | 0.3 | 0.3 | 26.6 | 16.2 | 11.0 |
| ASEP | 11–15 Jan 1999 | 1,222 | 29.4 | 23.2 | 5.8 | 6.3* | * | 0.2 | – | 17.0 | 11.6 | 6.2 |
| ASEP | 7–14 Dec 1998 | 1,224 | 27.9 | 21.8 | 6.3 | 6.1* | * | 0.2 | – | 17.8 | 12.5 | 6.1 |
| ASEP | 9–13 Nov 1998 | 1,209 | 25.8 | 27.7 | 3.0 | 8.3* | * | – | – | 22.1 | 8.8 | 1.9 |
| CIS | 26–31 Oct 1998 | 2,490 | 26.1 | 22.9 | 4.6 | 2.0 | 0.8 | 0.4 | 0.4 | 26.4 | 10.2 | 3.2 |
| ASEP | 13–19 Oct 1998 | 1,214 | 26.1 | 27.5 | 5.3 | 5.1* | * | 0.2 | – | 18.2 | 9.8 | 1.4 |
| Vox Pública/El Periódico | 28 Sep–3 Oct 1998 | 1,992 | 24.0 | 22.7 | 6.2 | 2.6 | 0.6 | – | – | 30.3 | 7.8 | 1.3 |
| Demoscopia/El País | 28–30 Sep 1998 | 1,500 | 24.9 | 21.2 | 6.2 | 2.2 | – | – | – | 20.9 | 16.0 | 3.7 |
| ASEP | 14–18 Sep 1998 | 1,221 | 22.7 | 26.9 | 4.7 | 4.8* | * | 0.2 | – | 21.8 | 12.2 | 4.2 |
| ASEP | 13–17 Jul 1998 | 1,216 | 23.3 | 27.4 | 5.6 | 4.8* | * | 0.2 | – | 20.5 | 13.2 | 4.1 |
| CIS | 9–13 Jul 1998 | 2,486 | 23.9 | 23.8 | 5.1 | 2.5 | 0.5 | 0.6 | 0.6 | 26.2 | 9.9 | 0.1 |
| Demoscopia/El País | 5–8 Jul 1998 | 1,200 | 22.7 | 21.3 | 5.2 | 2.3 | – | – | – | 22.8 | 17.5 | 1.4 |
| ASEP | 15–19 Jun 1998 | 1,222 | 23.7 | 24.7 | 7.1 | 4.3* | * | 0.2 | – | 21.4 | 11.0 | 1.0 |
| Vox Pública/El Periódico | 15–17 Jun 1998 | 1,992 | 24.4 | 23.2 | 5.5 | 2.2 | 1.1 | – | – | 28.4 | 9.2 | 1.2 |
| ASEP | 18–22 May 1998 | 1,205 | 27.5 | 25.6 | 6.1 | 4.5* | * | 0.4 | – | 20.8 | 9.1 | 1.9 |
| Demoscopia/El País | 4–6 May 1998 | 1,200 | 23.3 | 24.8 | 4.6 | 3.7 | – | – | – | 21.5 | 13.7 | 1.5 |
| Vox Pública/El Periódico | 27–29 Apr 1998 | 1,200 | 22.5 | 24.2 | 5.0 | 2.3 | 1.0 | – | – | 29.3 | 9.5 | 1.7 |
| CIS | 25–29 Apr 1998 | 2,498 | 22.0 | 25.6 | 5.6 | 3.5 | 1.2 | 0.7 | – | 24.7 | 10.3 | 3.6 |
| ASEP | 20–24 Apr 1998 | 1,204 | 22.3 | 26.0 | 6.4 | 5.4* | * | 0.2 | – | 23.6 | 10.7 | 3.7 |
| ASEP | 16–20 Mar 1998 | 1,209 | 25.5 | 24.8 | 4.3 | 5.1* | * | 0.3 | – | 21.1 | 12.5 | 0.7 |
| ASEP | 16–20 Feb 1998 | 1,213 | 22.7 | 22.8 | 5.9 | 4.5* | * | 0.4 | – | 22.1 | 12.9 | 0.1 |
| CIS | 23–27 Jan 1998 | 2,496 | 24.5 | 22.6 | 5.3 | 2.5 | 0.6 | 0.4 | – | 26.3 | 11.1 | 1.9 |
| ASEP | 19–23 Jan 1998 | 1,209 | 28.1 | 21.7 | 5.3 | 5.9* | * | 0.3 | – | 21.5 | 11.9 | 6.4 |
| ASEP | 9–13 Dec 1997 | 1,204 | 28.3 | 21.8 | 5.1 | 5.1* | * | 0.2 | – | 22.6 | 10.8 | 6.5 |
| Demoscopia/El País | 30 Nov 1997 | ? | 25.0 | 20.4 | 5.2 | 1.8 | – | – | – | 21.6 | 17.8 | 4.6 |
| ASEP | 10–15 Nov 1997 | 1,211 | 26.5 | 26.8 | 5.3 | 5.1* | * | 0.2 | – | 18.6 | 11.0 | 0.3 |
| CIS | 24–28 Oct 1997 | 2,496 | 25.2 | 23.6 | 5.2 | 2.8 | 1.0 | 0.4 | – | 21.1 | 12.2 | 1.6 |
| ASEP | 13–18 Oct 1997 | 1,214 | 26.0 | 23.4 | 5.9 | 4.9* | * | 0.2 | – | 22.2 | 11.5 | 2.6 |
| DECO/PSOE | 29 Sep–3 Oct 1997 | ? | 29.2 | 26.7 | 5.8 | – | – | – | – | – | – | 2.5 |
| ASEP | 15–20 Sep 1997 | 1,218 | 29.1 | 24.4 | 5.5 | 6.1* | * | 0.4 | – | 18.2 | 11.0 | 4.7 |
| CIS | 11–15 Jul 1997 | 2,495 | 24.7 | 27.5 | 4.8 | 2.6 | 1.0 | 0.3 | – | 23.9 | 9.0 | 2.8 |
| ASEP | 7–11 Jul 1997 | 1,214 | 26.2 | 26.6 | 5.6 | 5.4* | * | 0.2 | – | 19.9 | 9.7 | 0.4 |
| Demoscopia/El País | 7–9 Jul 1997 | 1,200 | 23.9 | 22.3 | 6.3 | 2.5 | – | – | – | 23.8 | 13.8 | 1.6 |
| ASEP | 9–14 Jun 1997 | 1,220 | 23.2 | 26.5 | 7.5 | 7.2* | * | 0.4 | – | 18.6 | 11.3 | 3.3 |
| Vox Pública/El Periódico | 20–22 May 1997 | 800 | 29.4 | 25.1 | 5.1 | 2.8 | – | – | – | 24.0 | 5.5 | 4.3 |
| ASEP | 12–17 May 1997 | 1,221 | 25.1 | 24.6 | 6.8 | 6.0* | * | 0.2 | – | 20.0 | 11.8 | 0.5 |
| Demoscopia/El País | 27 Apr 1997 | ? | 21.0 | 22.5 | 6.3 | 2.8 | – | – | – | 23.1 | 17.8 | 1.5 |
| CIS | 23–27 Apr 1997 | 2,496 | 23.2 | 24.0 | 6.7 | 3.3 | 0.6 | 0.4 | – | 25.1 | 10.1 | 0.8 |
| ASEP | 4–19 Apr 1997 | 1,211 | 25.5 | 24.7 | 7.5 | 6.2* | * | – | – | 19.5 | 9.5 | 0.8 |
| ASEP | 10–15 Mar 1997 | 1,218 | 24.3 | 27.3 | 6.8 | 5.9* | * | 0.1 | – | 17.9 | 10.9 | 3.0 |
| ASEP | 10–15 Feb 1997 | 1,213 | 20.9 | 27.9 | 8.6 | 4.5* | * | 0.2 | – | 20.2 | 10.4 | 7.0 |
| CIS | 23–27 Jan 1997 | 2,488 | 22.5 | 22.6 | 6.8 | 3.5 | 0.7 | 0.4 | – | 24.6 | 11.5 | 0.1 |
| ASEP | 13–18 Jan 1997 | 1,212 | 23.1 | 24.7 | 6.6 | 6.1* | * | 0.7 | – | 19.4 | 12.3 | 1.6 |
| Demoscopia/El País | 12–15 Jan 1997 | ? | 22.1 | 25.3 | 6.3 | 1.8 | – | – | – | 23.9 | 13.2 | 3.2 |
| ASEP | 2–7 Dec 1996 | 1,219 | 18.9 | 27.5 | 8.2 | 5.8* | * | 0.3 | – | 20.3 | 11.6 | 8.6 |
| DECO/PSOE | 25–29 Nov 1996 | 1,500 | 26.0 | 25.2 | – | – | – | – | – | – | – | 0.8 |
| PP | 26 Nov 1996 | ? | 21.0 | 27.0 | – | – | – | – | – | – | – | 6.0 |
| ASEP | 2–7 Nov 1996 | 1,211 | 19.7 | 30.0 | 8.5 | 5.8* | * | 0.3 | – | 19.6 | 9.7 | 10.3 |
| CIS | 26–31 Oct 1996 | 2,498 | 21.5 | 27.3 | 7.1 | 3.5 | 0.7 | 0.3 | – | 22.9 | 9.8 | 5.8 |
| DECO/PSOE | 22 Oct 1996 | ? | 23.7 | 22.9 | 8.5 | – | – | – | – | – | – | 0.8 |
| ASEP | 7–12 Oct 1996 | 1,212 | 21.1 | 25.6 | 8.2 | 6.2* | * | 0.4 | – | 19.6 | 11.4 | 4.5 |
| Demoscopia/El País | 7–9 Oct 1996 | ? | 23.2 | 27.8 | 9.3 | 3.5 | – | – | – | 15.8 | 12.1 | 4.6 |
| CIS | 17–21 Jul 1996 | 2,496 | 25.4 | 23.6 | 8.3 | 3.8 | 0.8 | 0.6 | – | 23.0 | 8.8 | 1.8 |
| Demoscopia/El País | 15–17 Jul 1996 | ? | 30.5 | 24.6 | 9.0 | – | – | – | – | – | – | 5.9 |
| ASEP | 10–15 Jun 1996 | 1,219 | 25.3 | 28.2 | 7.7 | 5.3* | * | 0.1 | – | 20.3 | 6.6 | 2.9 |
| CIS | 29 May–2 Jun 1996 | 2,496 | 24.6 | 24.9 | 9.0 | 4.6 | 1.2 | 0.6 | – | 23.5 | 6.0 | 0.3 |
| ASEP | 13–18 May 1996 | 1,212 | 29.3 | 27.4 | 7.7 | 5.9* | * | 0.7 | – | 9.9 | 8.1 | 1.9 |
| Demoscopia/El País | 12 May 1996 | ? | 29.7 | 28.8 | – | – | – | – | – | – | – | 0.9 |
| ASEP | 15–20 Apr 1996 | 1,220 | 25.6 | 29.2 | 9.4 | 6.7* | * | 0.2 | – | 16.5 | 7.3 | 3.6 |
| ASEP | 11–16 Mar 1996 | 1,212 | 27.1 | 32.1 | 9.3 | 6.3* | * | 0.4 | – | 13.6 | 5.4 | 5.0 |
| 1996 general election | 3 Mar 1996 | — | 30.2 | 29.1 | 8.2 | 3.6 | 1.0 | 0.7 | – | — | 21.9 | 1.1 |
| (*) Includes data for CiU, PNV, EA, CG, PRC, PAR, UPN, PA, UV, EU and CC. |||||||||||||

#### Victory preference

The table below lists opinion polling on the victory preferences for each party in the event of a general election taking place.
| Polling firm/Commissioner | Fieldwork date | Sample size | | | | | PNV | Other/ None | ? | Lead |
| CIS | 11–28 Feb 2000 | 24,040 | 34.4 | 24.9 | 5.0 | 1.9 | 0.9 | 5.7 | 27.2 | 9.5 |
| Gallup | 7–28 Feb 2000 | 2,029 | 33.0 | 27.0 | 4.0 | – | – | 13.0 | 23.0 | 6.0 |

#### Victory likelihood

The table below lists opinion polling on the perceived likelihood of victory for each party in the event of a general election taking place.
| Polling firm/Commissioner | Fieldwork date | Sample size | | | Other/ None | ? | Lead |
| CIS | 11–28 Feb 2000 | 24,040 | 63.9 | 10.2 | 2.1 | 23.8 | 53.7 |
| Demoscopia/El País | 13–15 Sep 1999 | 1,809 | 60.0 | 15.0 | – | 25.0 | 45.0 |
| Demoscopia/El País | 12–14 Apr 1999 | 1,200 | 65.0 | 12.0 | – | 23.0 | 53.0 |
| Demoscopia/El País | 1–4 Feb 1999 | 1,500 | 69.0 | 12.0 | – | 19.0 | 57.0 |
| Demoscopia/El País | 28–30 Sep 1998 | 1,500 | 59.0 | 21.0 | – | 20.0 | 38.0 |
| Demoscopia/El País | 5–8 Jul 1998 | 1,200 | 54.0 | 27.0 | – | 19.0 | 27.0 |
| Demoscopia/El País | 4–6 May 1998 | 1,200 | 49.0 | 29.0 | – | 22.0 | 20.0 |