Opinion Poll by Tietoykkönen for Iltalehti and Uusi Suomi, 18–31 May 2018
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 |
|---|---|---|---|---|---|---|
| Suomen Sosialidemokraattinen Puolue | 16.5% | 21.2% | 19.7–22.8% | 19.3–23.2% | 18.9–23.6% | 18.2–24.4% |
| Kansallinen Kokoomus | 18.2% | 19.5% | 18.1–21.1% | 17.7–21.5% | 17.3–21.9% | 16.7–22.7% |
| Suomen Keskusta | 21.1% | 15.1% | 13.8–16.5% | 13.5–16.9% | 13.2–17.3% | 12.6–18.0% |
| Vihreä liitto | 8.5% | 13.1% | 11.9–14.5% | 11.6–14.8% | 11.3–15.2% | 10.7–15.9% |
| Vasemmistoliitto | 7.1% | 9.0% | 8.0–10.2% | 7.7–10.5% | 7.5–10.8% | 7.0–11.4% |
| Perussuomalaiset | 17.6% | 7.9% | 7.0–9.0% | 6.7–9.3% | 6.5–9.6% | 6.1–10.2% |
| Svenska folkpartiet i Finland | 4.9% | 4.8% | 4.1–5.7% | 3.9–5.9% | 3.7–6.2% | 3.4–6.6% |
| Kristillisdemokraatit | 3.5% | 4.3% | 3.7–5.2% | 3.5–5.5% | 3.3–5.7% | 3.0–6.1% |
| Sininen tulevaisuus | 0.0% | 2.5% | 2.0–3.2% | 1.9–3.4% | 1.8–3.6% | 1.5–4.0% |
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 |
|---|---|---|---|---|---|---|
| Suomen Sosialidemokraattinen Puolue | 34 | 47 | 44–51 | 43–53 | 42–54 | 40–57 |
| Kansallinen Kokoomus | 37 | 41 | 38–47 | 37–49 | 37–49 | 36–50 |
| Suomen Keskusta | 49 | 35 | 32–39 | 31–41 | 30–42 | 29–43 |
| Vihreä liitto | 15 | 26 | 23–30 | 22–30 | 21–31 | 19–31 |
| Vasemmistoliitto | 12 | 17 | 15–20 | 14–21 | 13–21 | 12–23 |
| Perussuomalaiset | 38 | 14 | 12–18 | 12–19 | 11–20 | 10–21 |
| Svenska folkpartiet i Finland | 9 | 10 | 8–11 | 7–12 | 7–13 | 6–14 |
| Kristillisdemokraatit | 5 | 6 | 6 | 5–7 | 4–8 | 2–9 |
| Sininen tulevaisuus | 0 | 1 | 0–1 | 0–1 | 0–1 | 0–2 |
Suomen Sosialidemokraattinen Puolue
For a full overview of the results for this party, see the Suomen Sosialidemokraattinen Puolue page.

| Number of Seats | Probability | Accumulated | Special Marks |
|---|---|---|---|
| 34 | 0% | 100% | Last Result |
| 35 | 0% | 100% | |
| 36 | 0% | 100% | |
| 37 | 0% | 100% | |
| 38 | 0.1% | 100% | |
| 39 | 0.1% | 99.9% | |
| 40 | 0.9% | 99.8% | |
| 41 | 0.7% | 98.9% | |
| 42 | 1.1% | 98% | |
| 43 | 4% | 97% | |
| 44 | 7% | 93% | |
| 45 | 12% | 86% | |
| 46 | 14% | 74% | |
| 47 | 19% | 60% | Median |
| 48 | 11% | 41% | |
| 49 | 9% | 30% | |
| 50 | 6% | 21% | |
| 51 | 6% | 15% | |
| 52 | 2% | 9% | |
| 53 | 3% | 7% | |
| 54 | 2% | 4% | |
| 55 | 0.5% | 2% | |
| 56 | 0.9% | 2% | |
| 57 | 0.4% | 0.6% | |
| 58 | 0.2% | 0.3% | |
| 59 | 0% | 0.1% | |
| 60 | 0.1% | 0.1% | |
| 61 | 0% | 0% |
Kansallinen Kokoomus
For a full overview of the results for this party, see the Kansallinen Kokoomus page.

| Number of Seats | Probability | Accumulated | Special Marks |
|---|---|---|---|
| 34 | 0% | 100% | |
| 35 | 0.2% | 99.9% | |
| 36 | 0.9% | 99.7% | |
| 37 | 8% | 98.8% | Last Result |
| 38 | 11% | 91% | |
| 39 | 18% | 80% | |
| 40 | 12% | 62% | |
| 41 | 10% | 50% | Median |
| 42 | 9% | 40% | |
| 43 | 9% | 31% | |
| 44 | 4% | 22% | |
| 45 | 2% | 18% | |
| 46 | 4% | 16% | |
| 47 | 3% | 12% | |
| 48 | 4% | 9% | |
| 49 | 4% | 6% | |
| 50 | 0.8% | 1.1% | |
| 51 | 0.3% | 0.3% | |
| 52 | 0% | 0% |
Suomen Keskusta
For a full overview of the results for this party, see the Suomen Keskusta page.

| Number of Seats | Probability | Accumulated | Special Marks |
|---|---|---|---|
| 26 | 0% | 100% | |
| 27 | 0% | 99.9% | |
| 28 | 0.2% | 99.9% | |
| 29 | 0.9% | 99.7% | |
| 30 | 3% | 98.8% | |
| 31 | 3% | 96% | |
| 32 | 3% | 93% | |
| 33 | 9% | 90% | |
| 34 | 20% | 81% | |
| 35 | 16% | 61% | Median |
| 36 | 11% | 45% | |
| 37 | 10% | 33% | |
| 38 | 10% | 23% | |
| 39 | 5% | 14% | |
| 40 | 3% | 9% | |
| 41 | 3% | 6% | |
| 42 | 2% | 3% | |
| 43 | 0.5% | 0.9% | |
| 44 | 0.3% | 0.4% | |
| 45 | 0.1% | 0.1% | |
| 46 | 0% | 0% | |
| 47 | 0% | 0% | |
| 48 | 0% | 0% | |
| 49 | 0% | 0% | Last Result |
Vihreä liitto
For a full overview of the results for this party, see the Vihreä liitto page.

| Number of Seats | Probability | Accumulated | Special Marks |
|---|---|---|---|
| 15 | 0% | 100% | Last Result |
| 16 | 0% | 100% | |
| 17 | 0% | 100% | |
| 18 | 0.3% | 100% | |
| 19 | 0.6% | 99.6% | |
| 20 | 0.6% | 99.1% | |
| 21 | 1.2% | 98% | |
| 22 | 7% | 97% | |
| 23 | 8% | 90% | |
| 24 | 12% | 82% | |
| 25 | 11% | 71% | |
| 26 | 12% | 60% | Median |
| 27 | 11% | 49% | |
| 28 | 17% | 37% | |
| 29 | 8% | 20% | |
| 30 | 8% | 12% | |
| 31 | 4% | 4% | |
| 32 | 0.3% | 0.5% | |
| 33 | 0.1% | 0.2% | |
| 34 | 0% | 0% |
Vasemmistoliitto
For a full overview of the results for this party, see the Vasemmistoliitto page.

| Number of Seats | Probability | Accumulated | Special Marks |
|---|---|---|---|
| 11 | 0.3% | 100% | |
| 12 | 0.6% | 99.6% | Last Result |
| 13 | 2% | 99.0% | |
| 14 | 3% | 97% | |
| 15 | 6% | 94% | |
| 16 | 11% | 88% | |
| 17 | 33% | 77% | Median |
| 18 | 12% | 44% | |
| 19 | 13% | 33% | |
| 20 | 11% | 19% | |
| 21 | 6% | 8% | |
| 22 | 1.3% | 2% | |
| 23 | 0.4% | 0.7% | |
| 24 | 0.3% | 0.3% | |
| 25 | 0% | 0.1% | |
| 26 | 0% | 0% |
Perussuomalaiset
For a full overview of the results for this party, see the Perussuomalaiset page.

| Number of Seats | Probability | Accumulated | Special Marks |
|---|---|---|---|
| 10 | 1.4% | 100% | |
| 11 | 2% | 98.6% | |
| 12 | 17% | 96% | |
| 13 | 9% | 79% | |
| 14 | 35% | 70% | Median |
| 15 | 9% | 35% | |
| 16 | 7% | 26% | |
| 17 | 6% | 19% | |
| 18 | 5% | 13% | |
| 19 | 5% | 8% | |
| 20 | 0.8% | 3% | |
| 21 | 2% | 2% | |
| 22 | 0.3% | 0.4% | |
| 23 | 0% | 0% | |
| 24 | 0% | 0% | |
| 25 | 0% | 0% | |
| 26 | 0% | 0% | |
| 27 | 0% | 0% | |
| 28 | 0% | 0% | |
| 29 | 0% | 0% | |
| 30 | 0% | 0% | |
| 31 | 0% | 0% | |
| 32 | 0% | 0% | |
| 33 | 0% | 0% | |
| 34 | 0% | 0% | |
| 35 | 0% | 0% | |
| 36 | 0% | 0% | |
| 37 | 0% | 0% | |
| 38 | 0% | 0% | Last Result |
Svenska folkpartiet i Finland
For a full overview of the results for this party, see the Svenska folkpartiet i Finland page.

| Number of Seats | Probability | Accumulated | Special Marks |
|---|---|---|---|
| 5 | 0.1% | 100% | |
| 6 | 1.2% | 99.9% | |
| 7 | 5% | 98.7% | |
| 8 | 18% | 94% | |
| 9 | 18% | 76% | Last Result |
| 10 | 18% | 59% | Median |
| 11 | 35% | 41% | |
| 12 | 1.2% | 6% | |
| 13 | 4% | 5% | |
| 14 | 0.7% | 0.7% | |
| 15 | 0% | 0% |
Kristillisdemokraatit
For a full overview of the results for this party, see the Kristillisdemokraatit page.

| Number of Seats | Probability | Accumulated | Special Marks |
|---|---|---|---|
| 1 | 0.1% | 100% | |
| 2 | 0.9% | 99.9% | |
| 3 | 0.6% | 98.9% | |
| 4 | 2% | 98% | |
| 5 | 4% | 96% | Last Result |
| 6 | 85% | 92% | Median |
| 7 | 4% | 8% | |
| 8 | 2% | 4% | |
| 9 | 1.1% | 1.5% | |
| 10 | 0.2% | 0.3% | |
| 11 | 0.1% | 0.1% | |
| 12 | 0% | 0.1% | |
| 13 | 0% | 0% |
Sininen tulevaisuus
For a full overview of the results for this party, see the Sininen tulevaisuus page.

| Number of Seats | Probability | Accumulated | Special Marks |
|---|---|---|---|
| 0 | 39% | 100% | Last Result |
| 1 | 61% | 61% | Median |
| 2 | 0.7% | 0.9% | |
| 3 | 0.1% | 0.2% | |
| 4 | 0.1% | 0.1% | |
| 5 | 0% | 0.1% | |
| 6 | 0% | 0% |
Coalitions

Confidence Intervals
| Coalition | Last Result | Median | Majority? | 80% Confidence Interval | 90% Confidence Interval | 95% Confidence Interval | 99% Confidence Interval |
|---|---|---|---|---|---|---|---|
| Suomen Sosialidemokraattinen Puolue – Kansallinen Kokoomus – Vihreä liitto – Vasemmistoliitto – Svenska folkpartiet i Finland – Kristillisdemokraatit | 112 | 148 | 100% | 144–152 | 143–154 | 142–155 | 141–156 |
| Suomen Sosialidemokraattinen Puolue – Kansallinen Kokoomus – Vihreä liitto – Svenska folkpartiet i Finland – Kristillisdemokraatit | 100 | 130 | 100% | 126–135 | 125–136 | 124–137 | 122–140 |
| Suomen Sosialidemokraattinen Puolue – Kansallinen Kokoomus – Svenska folkpartiet i Finland – Kristillisdemokraatit | 85 | 104 | 87% | 100–110 | 99–112 | 98–113 | 97–115 |
| Kansallinen Kokoomus – Suomen Keskusta – Perussuomalaiset | 124 | 91 | 1.4% | 86–96 | 86–98 | 85–100 | 83–101 |
| Kansallinen Kokoomus – Suomen Keskusta – Sininen tulevaisuus | 86 | 77 | 0% | 73–84 | 72–85 | 71–86 | 70–88 |
Suomen Sosialidemokraattinen Puolue – Kansallinen Kokoomus – Vihreä liitto – Vasemmistoliitto – Svenska folkpartiet i Finland – Kristillisdemokraatit

| Number of Seats | Probability | Accumulated | Special Marks |
|---|---|---|---|
| 112 | 0% | 100% | Last Result |
| 113 | 0% | 100% | |
| 114 | 0% | 100% | |
| 115 | 0% | 100% | |
| 116 | 0% | 100% | |
| 117 | 0% | 100% | |
| 118 | 0% | 100% | |
| 119 | 0% | 100% | |
| 120 | 0% | 100% | |
| 121 | 0% | 100% | |
| 122 | 0% | 100% | |
| 123 | 0% | 100% | |
| 124 | 0% | 100% | |
| 125 | 0% | 100% | |
| 126 | 0% | 100% | |
| 127 | 0% | 100% | |
| 128 | 0% | 100% | |
| 129 | 0% | 100% | |
| 130 | 0% | 100% | |
| 131 | 0% | 100% | |
| 132 | 0% | 100% | |
| 133 | 0% | 100% | |
| 134 | 0% | 100% | |
| 135 | 0% | 100% | |
| 136 | 0% | 100% | |
| 137 | 0% | 100% | |
| 138 | 0.1% | 100% | |
| 139 | 0.1% | 99.9% | |
| 140 | 0.2% | 99.8% | |
| 141 | 1.1% | 99.6% | |
| 142 | 2% | 98% | |
| 143 | 4% | 97% | |
| 144 | 5% | 93% | |
| 145 | 4% | 88% | |
| 146 | 16% | 84% | |
| 147 | 8% | 68% | Median |
| 148 | 10% | 60% | |
| 149 | 12% | 49% | |
| 150 | 11% | 37% | |
| 151 | 12% | 27% | |
| 152 | 4% | 14% | |
| 153 | 4% | 10% | |
| 154 | 3% | 6% | |
| 155 | 2% | 3% | |
| 156 | 0.5% | 0.8% | |
| 157 | 0.2% | 0.3% | |
| 158 | 0.1% | 0.1% | |
| 159 | 0% | 0% |
Suomen Sosialidemokraattinen Puolue – Kansallinen Kokoomus – Vihreä liitto – Svenska folkpartiet i Finland – Kristillisdemokraatit

| Number of Seats | Probability | Accumulated | Special Marks |
|---|---|---|---|
| 100 | 0% | 100% | Last Result |
| 101 | 0% | 100% | Majority |
| 102 | 0% | 100% | |
| 103 | 0% | 100% | |
| 104 | 0% | 100% | |
| 105 | 0% | 100% | |
| 106 | 0% | 100% | |
| 107 | 0% | 100% | |
| 108 | 0% | 100% | |
| 109 | 0% | 100% | |
| 110 | 0% | 100% | |
| 111 | 0% | 100% | |
| 112 | 0% | 100% | |
| 113 | 0% | 100% | |
| 114 | 0% | 100% | |
| 115 | 0% | 100% | |
| 116 | 0% | 100% | |
| 117 | 0% | 100% | |
| 118 | 0% | 100% | |
| 119 | 0% | 100% | |
| 120 | 0% | 100% | |
| 121 | 0.3% | 100% | |
| 122 | 0.3% | 99.7% | |
| 123 | 0.3% | 99.4% | |
| 124 | 2% | 99.1% | |
| 125 | 4% | 97% | |
| 126 | 4% | 93% | |
| 127 | 4% | 89% | |
| 128 | 4% | 85% | |
| 129 | 18% | 81% | |
| 130 | 14% | 64% | Median |
| 131 | 12% | 49% | |
| 132 | 8% | 38% | |
| 133 | 10% | 30% | |
| 134 | 8% | 20% | |
| 135 | 5% | 12% | |
| 136 | 4% | 8% | |
| 137 | 2% | 4% | |
| 138 | 1.2% | 2% | |
| 139 | 0.4% | 1.0% | |
| 140 | 0.3% | 0.6% | |
| 141 | 0.2% | 0.3% | |
| 142 | 0.1% | 0.1% | |
| 143 | 0% | 0% |
Suomen Sosialidemokraattinen Puolue – Kansallinen Kokoomus – Svenska folkpartiet i Finland – Kristillisdemokraatit

| Number of Seats | Probability | Accumulated | Special Marks |
|---|---|---|---|
| 85 | 0% | 100% | Last Result |
| 86 | 0% | 100% | |
| 87 | 0% | 100% | |
| 88 | 0% | 100% | |
| 89 | 0% | 100% | |
| 90 | 0% | 100% | |
| 91 | 0% | 100% | |
| 92 | 0% | 100% | |
| 93 | 0% | 100% | |
| 94 | 0% | 100% | |
| 95 | 0.1% | 100% | |
| 96 | 0.2% | 99.9% | |
| 97 | 0.7% | 99.7% | |
| 98 | 3% | 99.0% | |
| 99 | 3% | 96% | |
| 100 | 6% | 93% | |
| 101 | 13% | 87% | Majority |
| 102 | 9% | 74% | |
| 103 | 7% | 65% | |
| 104 | 11% | 58% | Median |
| 105 | 11% | 47% | |
| 106 | 6% | 36% | |
| 107 | 8% | 30% | |
| 108 | 6% | 22% | |
| 109 | 3% | 15% | |
| 110 | 4% | 12% | |
| 111 | 3% | 8% | |
| 112 | 3% | 5% | |
| 113 | 1.1% | 3% | |
| 114 | 1.0% | 2% | |
| 115 | 0.3% | 0.6% | |
| 116 | 0.2% | 0.3% | |
| 117 | 0.1% | 0.1% | |
| 118 | 0% | 0.1% | |
| 119 | 0% | 0.1% | |
| 120 | 0% | 0% |
Kansallinen Kokoomus – Suomen Keskusta – Perussuomalaiset

| Number of Seats | Probability | Accumulated | Special Marks |
|---|---|---|---|
| 80 | 0% | 100% | |
| 81 | 0.1% | 99.9% | |
| 82 | 0.2% | 99.8% | |
| 83 | 0.4% | 99.6% | |
| 84 | 1.1% | 99.3% | |
| 85 | 3% | 98% | |
| 86 | 9% | 95% | |
| 87 | 9% | 86% | |
| 88 | 4% | 78% | |
| 89 | 5% | 73% | |
| 90 | 4% | 68% | Median |
| 91 | 15% | 64% | |
| 92 | 10% | 49% | |
| 93 | 8% | 39% | |
| 94 | 10% | 30% | |
| 95 | 7% | 21% | |
| 96 | 5% | 14% | |
| 97 | 3% | 9% | |
| 98 | 2% | 6% | |
| 99 | 2% | 4% | |
| 100 | 1.1% | 3% | |
| 101 | 0.9% | 1.4% | Majority |
| 102 | 0.2% | 0.5% | |
| 103 | 0.1% | 0.3% | |
| 104 | 0.1% | 0.1% | |
| 105 | 0% | 0.1% | |
| 106 | 0% | 0% | |
| 107 | 0% | 0% | |
| 108 | 0% | 0% | |
| 109 | 0% | 0% | |
| 110 | 0% | 0% | |
| 111 | 0% | 0% | |
| 112 | 0% | 0% | |
| 113 | 0% | 0% | |
| 114 | 0% | 0% | |
| 115 | 0% | 0% | |
| 116 | 0% | 0% | |
| 117 | 0% | 0% | |
| 118 | 0% | 0% | |
| 119 | 0% | 0% | |
| 120 | 0% | 0% | |
| 121 | 0% | 0% | |
| 122 | 0% | 0% | |
| 123 | 0% | 0% | |
| 124 | 0% | 0% | Last Result |
Kansallinen Kokoomus – Suomen Keskusta – Sininen tulevaisuus

| Number of Seats | Probability | Accumulated | Special Marks |
|---|---|---|---|
| 68 | 0.1% | 100% | |
| 69 | 0.2% | 99.9% | |
| 70 | 0.7% | 99.7% | |
| 71 | 3% | 99.0% | |
| 72 | 2% | 96% | |
| 73 | 6% | 94% | |
| 74 | 12% | 88% | |
| 75 | 9% | 77% | |
| 76 | 11% | 68% | |
| 77 | 7% | 56% | Median |
| 78 | 17% | 50% | |
| 79 | 9% | 32% | |
| 80 | 5% | 24% | |
| 81 | 3% | 18% | |
| 82 | 2% | 15% | |
| 83 | 3% | 13% | |
| 84 | 5% | 10% | |
| 85 | 3% | 5% | |
| 86 | 0.9% | 3% | Last Result |
| 87 | 1.0% | 2% | |
| 88 | 0.6% | 0.9% | |
| 89 | 0.2% | 0.3% | |
| 90 | 0.1% | 0.2% | |
| 91 | 0.1% | 0.1% | |
| 92 | 0% | 0% |
Technical Information
Opinion Poll
- Polling firm: Tietoykkönen
- Commissioner(s): Iltalehti and Uusi Suomi
- Fieldwork period: 18–31 May 2018
Calculations
- Sample size: 1152
- Simulations done: 1,048,576
- Error estimate: 0.94%