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Power Plants in Finland

Finland has 191 power plants mapped on the OverWatts open energy atlas — the 21st-largest fleet of the 155 countries that hold any, and 0.6% of the world's mapped total. Of these, 61 operating and 121 under construction or proposed. Operating generation capacity totals 15.2 GW across 61 utility-scale plants of 100 MW and above. The largest is Olkiluoto nuclear power plant (3.6 GW).

The largest owner-operators are OX2 AB (18), Ilmatar Energy Oy (14) and Helen Oy (9) — OX2 AB alone is named on 9% of them. Half of Finland's power plants in service predate 2013 (median commissioning year of the 59 with a known date), 27 came online in the past decade and the oldest still listed is Imatra hydroelectric plant, dating from 1929. 121 are in the pipeline, led by Halla wind farm (2.1 GW), proposed. They account for 87% of every energy asset OverWatts maps in Finland.

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191
Power Plant in Finland
#21
of 155 countries
15.2 GW
Operating capacity
121
In construction / proposed

Operating generation capacity by fuel

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Largest power plants in Finland

Who owns Finland's power plants

Counts an asset once per company named as its owner or operator; a joint venture counts for each partner.

When they were built

Median commissioning year 2013 · oldest Imatra hydroelectric plant (1929) · newest Niinimäki wind farm (2025) · 59 of 191 carry a start date

Under construction & proposed

How Finland compares · power plants by country

Frequently asked

How many power plants are there in Finland?
OverWatts maps 191 power plants in Finland — 0.6% of the world's mapped total, the 21st-largest national fleet of the 155 countries with any.
What is the largest power plant in Finland?
Olkiluoto nuclear power plant, at 3.6 GW, operated by Teollisuuden Voima.
How much power-generation capacity do Finland's power plants have?
About 15.2 GW operating across 61 plants, with a further 42.6 GW under construction or proposed. That covers utility-scale sites of 100 MW and above, so it sits below national installed capacity wherever distributed generation is large.
Who owns the power plants in Finland?
OX2 AB is named as owner or operator on the most — 18 of 191 (9%). Next are Ilmatar Energy Oy (14), Helen Oy (9) and WPD Finland (8).
How old are Finland's power plants?
The median commissioning year is 2013, across the 59 in service with a known start date. The oldest still listed is Imatra hydroelectric plant (1929); 27 came online in the past ten years.
What new power plants are being built in Finland?
121 projects are under construction or proposed. The largest are Halla wind farm (2.1 GW), Korsnäs Offshore wind farm (2.0 GW) and Pooki Offshore wind farm (2.0 GW).

Other asset classes in Finland

LNG Terminal 7Pipeline 6Iron & Steel Plant 5Cement Plant 4Interconnector 3Grid Storage 1Chemical Plant 1Iron Ore Mine 1

Power Plants in other countries

China 11,537United States 3,831India 1,675Brazil 879Spain 653Australia 615Philippines 489Russia 461Canada 452Vietnam 392Japan 387Germany 335