Opinion Poll by GESOP for El Periòdic, 15–17 December 2017
Voting Intentions | Seats | Coalitions | Technical Information
Voting Intentions

Confidence Intervals
| Party | Last Result | Poll Result | 80% Confidence Interval | 90% Confidence Interval | 95% Confidence Interval | 99% Confidence Interval |
|---|---|---|---|---|---|---|
| Ciutadans–Partido de la Ciudadanía | 17.9% | 22.5% | 20.7–24.5% | 20.2–25.0% | 19.7–25.5% | 18.9–26.5% |
| Esquerra Republicana de Catalunya–Catalunya Sí | 39.6% | 21.2% | 19.5–23.2% | 19.0–23.7% | 18.5–24.2% | 17.7–25.2% |
| Junts per Catalunya | 39.6% | 19.0% | 17.3–20.9% | 16.8–21.4% | 16.4–21.9% | 15.7–22.8% |
| Partit dels Socialistes de Catalunya (PSC-PSOE) | 12.7% | 15.9% | 14.3–17.6% | 13.9–18.1% | 13.5–18.6% | 12.8–19.4% |
| Catalunya en Comú | 8.9% | 9.0% | 7.8–10.4% | 7.5–10.8% | 7.2–11.2% | 6.7–11.9% |
| Candidatura d’Unitat Popular | 8.2% | 5.5% | 4.6–6.7% | 4.3–7.0% | 4.1–7.3% | 3.7–7.9% |
| Partit Popular | 8.5% | 5.0% | 4.1–6.1% | 3.9–6.5% | 3.7–6.8% | 3.3–7.3% |
Note: The poll result column reflects the actual value used in the calculations. Published results may vary slightly, and in addition be rounded to fewer digits.
Seats

Confidence Intervals
| Party | Last Result | Median | 80% Confidence Interval | 90% Confidence Interval | 95% Confidence Interval | 99% Confidence Interval |
|---|---|---|---|---|---|---|
| Ciutadans–Partido de la Ciudadanía | 25 | 31 | 27–33 | 27–34 | 26–35 | 25–36 |
| Esquerra Republicana de Catalunya–Catalunya Sí | 20 | 32 | 29–35 | 29–36 | 29–37 | 26–38 |
| Junts per Catalunya | 29 | 29 | 26–31 | 24–32 | 24–33 | 23–35 |
| Partit dels Socialistes de Catalunya (PSC-PSOE) | 16 | 22 | 18–23 | 17–24 | 17–24 | 16–25 |
| Catalunya en Comú | 11 | 10 | 8–12 | 8–13 | 8–14 | 7–15 |
| Candidatura d’Unitat Popular | 10 | 8 | 4–8 | 3–9 | 3–9 | 3–10 |
| Partit Popular | 11 | 5 | 3–7 | 3–8 | 3–8 | 3–9 |
Ciutadans–Partido de la Ciudadanía
For a full overview of the results for this party, see the Ciutadans–Partido de la Ciudadanía page.

| Number of Seats | Probability | Accumulated | Special Marks |
|---|---|---|---|
| 24 | 0.1% | 100% | |
| 25 | 0.7% | 99.9% | Last Result |
| 26 | 4% | 99.2% | |
| 27 | 6% | 95% | |
| 28 | 7% | 89% | |
| 29 | 12% | 82% | |
| 30 | 16% | 70% | |
| 31 | 22% | 54% | Median |
| 32 | 10% | 32% | |
| 33 | 12% | 22% | |
| 34 | 7% | 10% | |
| 35 | 2% | 3% | |
| 36 | 1.0% | 1.5% | |
| 37 | 0.2% | 0.4% | |
| 38 | 0.2% | 0.2% | |
| 39 | 0% | 0% |
Esquerra Republicana de Catalunya–Catalunya Sí
For a full overview of the results for this party, see the Esquerra Republicana de Catalunya–Catalunya Sí page.

| Number of Seats | Probability | Accumulated | Special Marks |
|---|---|---|---|
| 20 | 0% | 100% | Last Result |
| 21 | 0% | 100% | |
| 22 | 0% | 100% | |
| 23 | 0% | 100% | |
| 24 | 0.1% | 100% | |
| 25 | 0.2% | 99.9% | |
| 26 | 0.5% | 99.8% | |
| 27 | 0.6% | 99.3% | |
| 28 | 1.0% | 98.6% | |
| 29 | 10% | 98% | |
| 30 | 18% | 88% | |
| 31 | 13% | 70% | |
| 32 | 14% | 57% | Median |
| 33 | 10% | 43% | |
| 34 | 12% | 33% | |
| 35 | 14% | 21% | |
| 36 | 4% | 7% | |
| 37 | 2% | 4% | |
| 38 | 1.3% | 2% | |
| 39 | 0.3% | 0.5% | |
| 40 | 0.1% | 0.1% | |
| 41 | 0% | 0% |
Junts per Catalunya
For a full overview of the results for this party, see the Junts per Catalunya page.

| Number of Seats | Probability | Accumulated | Special Marks |
|---|---|---|---|
| 22 | 0% | 100% | |
| 23 | 1.0% | 99.9% | |
| 24 | 4% | 98.9% | |
| 25 | 5% | 95% | |
| 26 | 9% | 90% | |
| 27 | 8% | 82% | |
| 28 | 10% | 73% | |
| 29 | 29% | 64% | Last Result, Median |
| 30 | 18% | 34% | |
| 31 | 7% | 16% | |
| 32 | 5% | 9% | |
| 33 | 2% | 4% | |
| 34 | 1.0% | 2% | |
| 35 | 0.9% | 1.1% | |
| 36 | 0.2% | 0.2% | |
| 37 | 0% | 0% |
Partit dels Socialistes de Catalunya (PSC-PSOE)
For a full overview of the results for this party, see the Partit dels Socialistes de Catalunya (PSC-PSOE) page.

| Number of Seats | Probability | Accumulated | Special Marks |
|---|---|---|---|
| 15 | 0.2% | 100% | |
| 16 | 2% | 99.8% | Last Result |
| 17 | 6% | 98% | |
| 18 | 6% | 91% | |
| 19 | 10% | 85% | |
| 20 | 9% | 75% | |
| 21 | 9% | 66% | |
| 22 | 28% | 57% | Median |
| 23 | 20% | 29% | |
| 24 | 7% | 9% | |
| 25 | 1.4% | 2% | |
| 26 | 0.2% | 0.4% | |
| 27 | 0.1% | 0.2% | |
| 28 | 0% | 0% |
Catalunya en Comú
For a full overview of the results for this party, see the Catalunya en Comú page.

| Number of Seats | Probability | Accumulated | Special Marks |
|---|---|---|---|
| 6 | 0.3% | 100% | |
| 7 | 0.6% | 99.6% | |
| 8 | 10% | 99.0% | |
| 9 | 31% | 89% | |
| 10 | 10% | 59% | Median |
| 11 | 27% | 49% | Last Result |
| 12 | 13% | 22% | |
| 13 | 5% | 9% | |
| 14 | 4% | 4% | |
| 15 | 0.4% | 0.5% | |
| 16 | 0.1% | 0.1% | |
| 17 | 0% | 0% |
Candidatura d’Unitat Popular
For a full overview of the results for this party, see the Candidatura d’Unitat Popular page.

| Number of Seats | Probability | Accumulated | Special Marks |
|---|---|---|---|
| 2 | 0% | 100% | |
| 3 | 7% | 99.9% | |
| 4 | 4% | 93% | |
| 5 | 16% | 90% | |
| 6 | 7% | 73% | |
| 7 | 14% | 66% | |
| 8 | 42% | 52% | Median |
| 9 | 9% | 10% | |
| 10 | 0.7% | 0.8% | Last Result |
| 11 | 0% | 0% |
Partit Popular
For a full overview of the results for this party, see the Partit Popular page.

| Number of Seats | Probability | Accumulated | Special Marks |
|---|---|---|---|
| 0 | 0.1% | 100% | |
| 1 | 0% | 99.9% | |
| 2 | 0.2% | 99.9% | |
| 3 | 14% | 99.7% | |
| 4 | 6% | 86% | |
| 5 | 44% | 80% | Median |
| 6 | 22% | 36% | |
| 7 | 9% | 14% | |
| 8 | 4% | 5% | |
| 9 | 1.1% | 1.4% | |
| 10 | 0.3% | 0.3% | |
| 11 | 0% | 0% | Last Result |
Coalitions

Confidence Intervals
| Coalition | Last Result | Median | Majority? | 80% Confidence Interval | 90% Confidence Interval | 95% Confidence Interval | 99% Confidence Interval |
|---|---|---|---|---|---|---|---|
| Esquerra Republicana de Catalunya–Catalunya Sí – Junts per Catalunya – Catalunya en Comú | 60 | 71 | 91% | 68–75 | 67–76 | 66–77 | 64–79 |
| Esquerra Republicana de Catalunya–Catalunya Sí – Junts per Catalunya – Candidatura d’Unitat Popular | 59 | 68 | 54% | 64–71 | 63–73 | 62–73 | 61–75 |
| Ciutadans–Partido de la Ciudadanía – Partit dels Socialistes de Catalunya (PSC-PSOE) – Catalunya en Comú – Partit Popular | 63 | 67 | 46% | 64–71 | 62–72 | 62–73 | 60–74 |
| Esquerra Republicana de Catalunya–Catalunya Sí – Partit dels Socialistes de Catalunya (PSC-PSOE) – Catalunya en Comú | 47 | 64 | 10% | 60–68 | 59–69 | 58–69 | 56–71 |
| Esquerra Republicana de Catalunya–Catalunya Sí – Junts per Catalunya | 49 | 61 | 1.1% | 57–65 | 56–66 | 55–67 | 54–68 |
| Ciutadans–Partido de la Ciudadanía – Partit dels Socialistes de Catalunya (PSC-PSOE) – Partit Popular | 52 | 57 | 0% | 53–61 | 52–61 | 51–62 | 49–64 |
Esquerra Republicana de Catalunya–Catalunya Sí – Junts per Catalunya – Catalunya en Comú
| Number of Seats | Probability | Accumulated | Special Marks |
|---|---|---|---|
| 60 | 0% | 100% | Last Result |
| 61 | 0% | 100% | |
| 62 | 0% | 100% | |
| 63 | 0.1% | 99.9% | |
| 64 | 0.4% | 99.8% | |
| 65 | 1.2% | 99.4% | |
| 66 | 3% | 98% | |
| 67 | 4% | 95% | |
| 68 | 6% | 91% | Majority |
| 69 | 12% | 85% | |
| 70 | 16% | 73% | |
| 71 | 15% | 57% | Median |
| 72 | 12% | 42% | |
| 73 | 9% | 31% | |
| 74 | 7% | 21% | |
| 75 | 6% | 14% | |
| 76 | 4% | 8% | |
| 77 | 2% | 4% | |
| 78 | 0.9% | 2% | |
| 79 | 0.4% | 0.7% | |
| 80 | 0.2% | 0.3% | |
| 81 | 0.1% | 0.1% | |
| 82 | 0% | 0% |
Esquerra Republicana de Catalunya–Catalunya Sí – Junts per Catalunya – Candidatura d’Unitat Popular
| Number of Seats | Probability | Accumulated | Special Marks |
|---|---|---|---|
| 59 | 0.1% | 100% | Last Result |
| 60 | 0.3% | 99.9% | |
| 61 | 0.7% | 99.6% | |
| 62 | 2% | 98.9% | |
| 63 | 5% | 97% | |
| 64 | 7% | 92% | |
| 65 | 8% | 86% | |
| 66 | 12% | 78% | |
| 67 | 12% | 66% | |
| 68 | 14% | 54% | Majority |
| 69 | 12% | 40% | Median |
| 70 | 11% | 27% | |
| 71 | 7% | 16% | |
| 72 | 4% | 9% | |
| 73 | 3% | 5% | |
| 74 | 1.2% | 2% | |
| 75 | 0.8% | 1.2% | |
| 76 | 0.3% | 0.4% | |
| 77 | 0.1% | 0.1% | |
| 78 | 0% | 0% |
Ciutadans–Partido de la Ciudadanía – Partit dels Socialistes de Catalunya (PSC-PSOE) – Catalunya en Comú – Partit Popular
| Number of Seats | Probability | Accumulated | Special Marks |
|---|---|---|---|
| 58 | 0.1% | 100% | |
| 59 | 0.3% | 99.9% | |
| 60 | 0.8% | 99.6% | |
| 61 | 1.2% | 98.8% | |
| 62 | 3% | 98% | |
| 63 | 4% | 95% | Last Result |
| 64 | 7% | 91% | |
| 65 | 11% | 84% | |
| 66 | 12% | 73% | |
| 67 | 14% | 60% | |
| 68 | 12% | 46% | Median, Majority |
| 69 | 12% | 34% | |
| 70 | 8% | 22% | |
| 71 | 7% | 14% | |
| 72 | 5% | 8% | |
| 73 | 2% | 3% | |
| 74 | 0.7% | 1.1% | |
| 75 | 0.3% | 0.4% | |
| 76 | 0.1% | 0.1% | |
| 77 | 0% | 0% |
Esquerra Republicana de Catalunya–Catalunya Sí – Partit dels Socialistes de Catalunya (PSC-PSOE) – Catalunya en Comú
| Number of Seats | Probability | Accumulated | Special Marks |
|---|---|---|---|
| 47 | 0% | 100% | Last Result |
| 48 | 0% | 100% | |
| 49 | 0% | 100% | |
| 50 | 0% | 100% | |
| 51 | 0% | 100% | |
| 52 | 0% | 100% | |
| 53 | 0% | 100% | |
| 54 | 0% | 100% | |
| 55 | 0.1% | 100% | |
| 56 | 0.5% | 99.9% | |
| 57 | 1.2% | 99.4% | |
| 58 | 2% | 98% | |
| 59 | 4% | 96% | |
| 60 | 6% | 92% | |
| 61 | 8% | 86% | |
| 62 | 12% | 79% | |
| 63 | 16% | 67% | |
| 64 | 15% | 51% | Median |
| 65 | 11% | 36% | |
| 66 | 8% | 25% | |
| 67 | 6% | 17% | |
| 68 | 5% | 10% | Majority |
| 69 | 3% | 6% | |
| 70 | 2% | 2% | |
| 71 | 0.5% | 0.8% | |
| 72 | 0.2% | 0.3% | |
| 73 | 0.1% | 0.1% | |
| 74 | 0% | 0% |
Esquerra Republicana de Catalunya–Catalunya Sí – Junts per Catalunya
| Number of Seats | Probability | Accumulated | Special Marks |
|---|---|---|---|
| 49 | 0% | 100% | Last Result |
| 50 | 0% | 100% | |
| 51 | 0% | 100% | |
| 52 | 0.1% | 100% | |
| 53 | 0.2% | 99.9% | |
| 54 | 0.6% | 99.7% | |
| 55 | 2% | 99.1% | |
| 56 | 4% | 97% | |
| 57 | 5% | 93% | |
| 58 | 8% | 89% | |
| 59 | 13% | 81% | |
| 60 | 14% | 68% | |
| 61 | 13% | 54% | Median |
| 62 | 12% | 41% | |
| 63 | 11% | 29% | |
| 64 | 8% | 18% | |
| 65 | 5% | 10% | |
| 66 | 3% | 6% | |
| 67 | 2% | 3% | |
| 68 | 0.7% | 1.1% | Majority |
| 69 | 0.2% | 0.4% | |
| 70 | 0.1% | 0.2% | |
| 71 | 0% | 0.1% | |
| 72 | 0% | 0% |
Ciutadans–Partido de la Ciudadanía – Partit dels Socialistes de Catalunya (PSC-PSOE) – Partit Popular
| Number of Seats | Probability | Accumulated | Special Marks |
|---|---|---|---|
| 48 | 0.1% | 100% | |
| 49 | 0.3% | 99.8% | |
| 50 | 1.0% | 99.5% | |
| 51 | 2% | 98% | |
| 52 | 3% | 96% | Last Result |
| 53 | 5% | 93% | |
| 54 | 7% | 89% | |
| 55 | 10% | 81% | |
| 56 | 13% | 71% | |
| 57 | 15% | 58% | |
| 58 | 15% | 43% | Median |
| 59 | 10% | 29% | |
| 60 | 8% | 19% | |
| 61 | 6% | 10% | |
| 62 | 3% | 4% | |
| 63 | 1.0% | 2% | |
| 64 | 0.4% | 0.6% | |
| 65 | 0.1% | 0.2% | |
| 66 | 0.1% | 0.1% | |
| 67 | 0% | 0% |
Technical Information
Opinion Poll
- Polling firm: GESOP
- Commissioner(s): El Periòdic
- Fieldwork period: 15–17 December 2017
Calculations
- Sample size: 800
- Simulations done: 8,388,608
- Error estimate: 1.51%