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Each poll as published, with its pollster, fieldwork dates, sample size and a link to the source.

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Sample size is how many people were asked. More people means less random error, never none.
±3 is the margin of error: the real figure is likely within 3 points either way of the one shown.
Two polls can differ because they were taken on different dates, with different methods and different samples.
est. means the institute did not publish a margin of error, so it is estimated from the sample size.
The average smooths this out: it combines recent polls, so one unusual poll cannot swing the picture.

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Polls with institute, dates, sample, margin of error, methodology and results
Institute	Date	Fieldwork	Sample	MoE	Method	Voting intention	Source
Taloustutkimus 🇫🇮 Finland · 2027 Finnish parliamentary election	5 Nov 2026	12 Oct 2026 – 3 Nov 2026	2,170	±2.1 est. (Not published: estimated from sample size (95%, simple random sample))	—	Social Democratic Party 22.9% Perussuomalaiset 16.7% National Coalition 15.4% Vasemmistoliitto 12.6% Suomen Keskusta 12.2% Vihreä liitto 8.6% Swedish People's Party 4.1% Kristillisdemokraatit 3.5% Movement Now 2.1%	Source for Taloustutkimus poll (opens in a new tab)
Verian 🇫🇮 Finland · 2027 Finnish parliamentary election	21 Oct 2026	15 Sept 2026 – 19 Oct 2026	4,076	±1.5 est. (Not published: estimated from sample size (95%, simple random sample))	—	Social Democratic Party 23.3% National Coalition 16.2% Perussuomalaiset 15.3% Suomen Keskusta 13.8% Vasemmistoliitto 11.6% Vihreä liitto 8.6% Swedish People's Party 4.0% Kristillisdemokraatit 2.8% Movement Now 2.4%	Source for Verian poll (opens in a new tab)
Taloustutkimus 🇫🇮 Finland · 2027 Finnish parliamentary election	8 Oct 2026	7 Sept 2026 – 5 Oct 2026	2,807	±1.8 est. (Not published: estimated from sample size (95%, simple random sample))	—	Social Democratic Party 22.7% Perussuomalaiset 16.5% National Coalition 16.3% Suomen Keskusta 12.6% Vasemmistoliitto 12.4% Vihreä liitto 8.3% Swedish People's Party 3.6% Kristillisdemokraatit 3.4% Movement Now 2.1%	Source for Taloustutkimus poll (opens in a new tab)
Verian 🇫🇮 Finland · 2027 Finnish parliamentary election	16 Sept 2026	18 Aug 2026 – 14 Sept 2026	3,078	±1.8 est. (Not published: estimated from sample size (95%, simple random sample))	—	Social Democratic Party 23.4% National Coalition 16.5% Perussuomalaiset 15.0% Suomen Keskusta 13.6% Vasemmistoliitto 11.6% Vihreä liitto 8.6% Swedish People's Party 4.1% Kristillisdemokraatit 3.0% Movement Now 2.2%	Source for Verian poll (opens in a new tab)
Taloustutkimus 🇫🇮 Finland · 2027 Finnish parliamentary election	3 Sept 2026	10 Aug 2026 – 1 Sept 2026	2,502	±2.0 est. (Not published: estimated from sample size (95%, simple random sample))	—	Social Democratic Party 22.6% National Coalition 17.0% Perussuomalaiset 16.3% Suomen Keskusta 13.5% Vasemmistoliitto 11.7% Vihreä liitto 8.2% Swedish People's Party 3.6% Kristillisdemokraatit 3.4% Movement Now 1.9%	Source for Taloustutkimus poll (opens in a new tab)
Verian 🇫🇮 Finland · 2027 Finnish parliamentary election	19 Aug 2026	14 Jul 2026 – 17 Aug 2026	2,946	±1.8 est. (Not published: estimated from sample size (95%, simple random sample))	—	Social Democratic Party 23.8% National Coalition 16.5% Perussuomalaiset 14.6% Suomen Keskusta 13.7% Vasemmistoliitto 11.3% Vihreä liitto 8.8% Swedish People's Party 4.0% Kristillisdemokraatit 3.0% Movement Now 2.3%	Source for Verian poll (opens in a new tab)
Taloustutkimus 🇫🇮 Finland · 2027 Finnish parliamentary election	6 Aug 2026	6 Jul 2026 – 3 Aug 2026	2,125	±2.1 est. (Not published: estimated from sample size (95%, simple random sample))	—	Social Democratic Party 23.8% National Coalition 17.0% Perussuomalaiset 15.6% Suomen Keskusta 12.7% Vasemmistoliitto 10.3% Vihreä liitto 9.0% Swedish People's Party 3.7% Kristillisdemokraatit 3.5% Movement Now 2.2%	Source for Taloustutkimus poll (opens in a new tab)
Verian 🇫🇮 Finland · 2027 Finnish parliamentary election	15 Jul 2026	15 Jun 2026 – 13 Jul 2026	3,512	±1.7 est. (Not published: estimated from sample size (95%, simple random sample))	—	Social Democratic Party 23.8% National Coalition 16.7% Perussuomalaiset 14.2% Suomen Keskusta 13.7% Vasemmistoliitto 11.5% Vihreä liitto 8.8% Swedish People's Party 4.0% Kristillisdemokraatit 3.1% Movement Now 2.1%	Source for Verian poll (opens in a new tab)
Taloustutkimus 🇫🇮 Finland · 2027 Finnish parliamentary election	2 Jul 2026	4 Jun 2026 – 30 Jun 2026	2,433	±2.0 est. (Not published: estimated from sample size (95%, simple random sample))	—	Social Democratic Party 23.2% National Coalition 17.4% Perussuomalaiset 14.5% Suomen Keskusta 13.6% Vasemmistoliitto 11.4% Vihreä liitto 8.6% Swedish People's Party 3.8% Kristillisdemokraatit 3.4% Movement Now 1.3%	Source for Taloustutkimus poll (opens in a new tab)
Verian 🇫🇮 Finland · 2027 Finnish parliamentary election	17 Jun 2026	18 May 2026 – 15 Jun 2026	4,080	±1.5 est. (Not published: estimated from sample size (95%, simple random sample))	—	Social Democratic Party 24.1% National Coalition 17.4% Perussuomalaiset 13.6% Suomen Keskusta 13.6% Vasemmistoliitto 11.2% Vihreä liitto 9.0% Swedish People's Party 3.9% Kristillisdemokraatit 3.1% Movement Now 2.1%	Source for Verian poll (opens in a new tab)
Taloustutkimus 🇫🇮 Finland · 2027 Finnish parliamentary election	4 Jun 2026	11 May 2026 – 1 Jun 2026	2,224	±2.1 est. (Not published: estimated from sample size (95%, simple random sample))	—	Social Democratic Party 23.0% National Coalition 18.3% Suomen Keskusta 14.1% Perussuomalaiset 13.8% Vasemmistoliitto 11.2% Vihreä liitto 8.3% Swedish People's Party 3.9% Kristillisdemokraatit 3.4% Movement Now 1.7%	Source for Taloustutkimus poll (opens in a new tab)
Verian 🇫🇮 Finland · 2027 Finnish parliamentary election	20 May 2026	21 Apr 2026 – 18 May 2026	4,120	±1.5 est. (Not published: estimated from sample size (95%, simple random sample))	—	Social Democratic Party 24.3% National Coalition 17.3% Suomen Keskusta 13.6% Perussuomalaiset 13.4% Vasemmistoliitto 11.0% Vihreä liitto 9.1% Swedish People's Party 3.8% Kristillisdemokraatit 3.3% Movement Now 2.0%	Source for Verian poll (opens in a new tab)
Taloustutkimus 🇫🇮 Finland · 2027 Finnish parliamentary election	7 May 2026	13 Apr 2026 – 5 May 2026	2,378	±2.0 est. (Not published: estimated from sample size (95%, simple random sample))	—	Social Democratic Party 23.7% National Coalition 17.6% Suomen Keskusta 14.2% Perussuomalaiset 13.9% Vasemmistoliitto 10.9% Vihreä liitto 9.1% Kristillisdemokraatit 4.0% Swedish People's Party 3.2% Movement Now 1.7%	Source for Taloustutkimus poll (opens in a new tab)
Verian 🇫🇮 Finland · 2027 Finnish parliamentary election	22 Apr 2026	18 Mar 2026 – 20 Apr 2026	4,340	±1.5 est. (Not published: estimated from sample size (95%, simple random sample))	—	Social Democratic Party 24.6% National Coalition 17.6% Suomen Keskusta 13.7% Perussuomalaiset 13.3% Vasemmistoliitto 10.6% Vihreä liitto 9.2% Swedish People's Party 4.0% Kristillisdemokraatit 3.1% Movement Now 1.9%	Source for Verian poll (opens in a new tab)
Verian 🇫🇮 Finland · 2027 Finnish parliamentary election	18 Mar 2026	17 Feb 2026 – 16 Mar 2026	4,048	±1.5 est. (Not published: estimated from sample size (95%, simple random sample))	—	Social Democratic Party 24.8% National Coalition 17.8% Suomen Keskusta 13.7% Perussuomalaiset 13.4% Vasemmistoliitto 10.4% Vihreä liitto 8.9% Swedish People's Party 4.0% Kristillisdemokraatit 3.2% Movement Now 1.8%	Source for Verian poll (opens in a new tab)
Verian 🇫🇮 Finland · 2027 Finnish parliamentary election	18 Feb 2026	20 Jan 2026 – 16 Feb 2026	4,072	±1.5 est. (Not published: estimated from sample size (95%, simple random sample))	—	Social Democratic Party 25.1% National Coalition 17.9% Suomen Keskusta 14.1% Perussuomalaiset 13.0% Vasemmistoliitto 10.4% Vihreä liitto 8.5% Swedish People's Party 4.0% Kristillisdemokraatit 3.3% Movement Now 1.7%	Source for Verian poll (opens in a new tab)
Taloustutkimus 🇫🇮 Finland · 2027 Finnish parliamentary election	5 Feb 2026	12 Jan 2026 – 3 Feb 2026	2,402	±2.0 est. (Not published: estimated from sample size (95%, simple random sample))	—	Social Democratic Party 25.0% National Coalition 18.8% Suomen Keskusta 14.3% Perussuomalaiset 13.3% Vasemmistoliitto 11.1% Vihreä liitto 7.9% Swedish People's Party 3.8% Kristillisdemokraatit 3.4% Movement Now 1.0%	Source for Taloustutkimus poll (opens in a new tab)
Verian 🇫🇮 Finland · 2027 Finnish parliamentary election	21 Jan 2026	5 Dec 2025 – 19 Jan 2026	4,050	±1.5 est. (Not published: estimated from sample size (95%, simple random sample))	—	Social Democratic Party 25.0% National Coalition 18.4% Suomen Keskusta 14.3% Perussuomalaiset 13.4% Vasemmistoliitto 10.0% Vihreä liitto 8.3% Swedish People's Party 4.0% Kristillisdemokraatit 3.0% Movement Now 1.5%	Source for Verian poll (opens in a new tab)
Taloustutkimus 🇫🇮 Finland · 2027 Finnish parliamentary election	9 Jan 2025	9 Dec 2024 – 7 Jan 2025	2,533	±1.9 est. (Not published: estimated from sample size (95%, simple random sample))	—	Social Democratic Party 23.2% National Coalition 20.0% Perussuomalaiset 14.9% Suomen Keskusta 13.1% Vasemmistoliitto 8.9% Vihreä liitto 8.3% Kristillisdemokraatit 3.9% Swedish People's Party 3.9% Movement Now 1.5%	Source for Taloustutkimus poll (opens in a new tab)
Verian 🇫🇮 Finland · 2027 Finnish parliamentary election	18 Dec 2024	18 Nov 2024 – 13 Dec 2024	2,418	±2.0 est. (Not published: estimated from sample size (95%, simple random sample))	—	Social Democratic Party 24.0% National Coalition 19.5% Perussuomalaiset 15.7% Suomen Keskusta 12.1% Vasemmistoliitto 8.5% Vihreä liitto 7.8% Kristillisdemokraatit 3.9% Swedish People's Party 3.8% Movement Now 2.5%	Source for Verian poll (opens in a new tab)

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