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South Korea — Energy Infrastructure

OverWatts maps 358 energy assets in South Korea across 12 layers — the 24th-largest mapped base of 157 countries. They include 230 power plants, 34 cement plants and 21 LNG terminals. Operating generation capacity is 128 GW, led by gas at 39%. Refining capacity is about 2,770 kb/d.

The companies named on the most assets are Korea Hydro & Nuclear Power (KHNP) Co Ltd (30), Korea Midland Power Co Ltd (17) and Korea South-East Power Co Ltd (17), counting both ownership and operatorship. Half of South Korea's mapped assets in service predate 2006 (median commissioning year of the 173 with a known date), 45 came online in the past decade and the oldest still listed is Cheongpyeong hydroelectric plant, dating from 1943. 40+ projects are under construction or proposed, led by Sinan-gun wind project (3.2 GW).

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358
Total assets
#24
of 157 countries
128 GW
operating · 230 power plants
2,770
Refining kb/d
273
LNG Mtpa
40
In construction / proposed

Operating generation capacity by fuel

Utility-scale sites of 100 MW and above. Distributed generation — rooftop solar especially — is outside the tracker, so this runs below national installed capacity.

Electricity generated by fuel · 2025

What the fleet actually produced — distinct from the installed capacity above.

Total 625 TWhDemand 625 TWhClean 40%Intensity 417 gCO₂/kWh

Ember · source · CC-BY-4.0

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Browse by asset class

Power grid 4,464 kmPower Plants 230Cement Plants 34LNG Terminals 21Grid Storage 18Iron & Steel Plants 18Chemical Plants 14Export Terminals 13Refineries 4Storage / Tank Farms 2Iron Ore Mines 2Data Centres 1Coal & Uranium Mines 1

Under construction & proposed

Largest assets

Biggest owners & operators

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

Frequently asked

How many energy assets does South Korea have?
OverWatts maps 358 in South Korea across 12 asset classes — the 24th-largest mapped base of the 157 countries covered.
How much electricity generation capacity does South Korea have?
About 128 GW operating across 112 plants, mostly gas 39%, coal 33% and nuclear 21%.
Who owns South Korea's energy infrastructure?
Korea Hydro & Nuclear Power (KHNP) Co Ltd is named as owner or operator on the most mapped assets (30), followed by Korea Midland Power Co Ltd (17), Korea South-East Power Co Ltd (17) and Korea East-West Power Co Ltd (15).
What energy projects are under construction in South Korea?
The largest under way or proposed are Sinan-gun wind project (3.2 GW), Dangjin power station (3.0 GW) and Hadong power station (3.0 GW).