Korea’s data center map: who is building what, where, and how many megawatts

This guide is for expats, investors, and Korea-watchers who want to understand South Korea’s fast-growing data center industry. The short answer: Korea had roughly 850 megawatts of operational IT-load capacity as of early 2025, the government has set a target of 18.4 gigawatts by 2035, and a new special law passed in May 2026 is reshaping where new facilities can be built and how fast they get approved.

How it works

A data center is a building full of servers, cooling systems, and power equipment. Operators measure capacity in megawatts (MW) of IT load — the power the servers themselves consume, not counting cooling overhead. Anything above roughly 100 MW is called hyperscale (very large).

In Korea, data centers need two core approvals before they can open. First, they must secure a grid-connection agreement with KEPCO (Korea Electric Power Corporation), the state-owned utility that owns the transmission and distribution network. Second, facilities above a certain size must pass a Power Grid Impact Assessment (PGIA), a technical review of whether the local grid can handle the new load. Until recently, KEPCO could complete a power-supply confirmation in two to three months; by 2025, congestion had pushed that to twelve months or more in the Seoul area.

In May 2026 the National Assembly passed the Special Act on the Promotion of the AI Data Center Industry. The law designates qualifying AI data centers as national strategic facilities (a formal status that unlocks streamlined government support). It introduces a one-stop approval system and a permit timeout mechanism — meaning silence from regulators counts as approval after a set period. Facilities built outside the Seoul Capital Region (Gyeonggi Province, Incheon, and Seoul itself) are exempt from Power Grid Impact Assessments under certain conditions.

Power purchase agreements (PPAs), which let operators buy renewable electricity directly from generators, were further liberalised in July 2025 when an amended Electricity Business Act Enforcement Decree removed minimum capacity requirements for on-site PPAs. In August 2026 the government created eleven regional electricity pricing zones, giving operators in nuclear-rich southern provinces discounts of up to ten percent on industrial power rates.

Why Korea does it this way

Korea’s telecom conglomerates — KT, SK, and LG — built the country’s first data centers in the 1990s and 2000s as captive infrastructure for their own networks. Because most enterprise customers and most internet users were in Greater Seoul, the industry clustered there. Bundang, Anyang, and Gasan (all within or adjacent to Seoul) became the country’s main colocation hubs.

That concentration created two problems. First, Seoul’s electricity grid is heavily loaded; new large facilities struggle to get KEPCO approval. Between August 2024 and March 2026, the final approval rate for grid-impact assessment applications in the Seoul Capital Region was 1.9 percent, with a single approval recorded inside Seoul city limits. Second, community opposition — residents’ concerns about electromagnetic fields, noise, and heat — has stalled roughly half of permitted projects in the capital area.

The government’s response has been a deliberate policy of decentralisation. The 2026 special law, combined with regional electricity discounts and infrastructure subsidies, is designed to pull new capacity toward Chungcheong, Gyeongsang, Jeolla, and Gangwon provinces, where grid headroom and land are more available.

The numbers that matter

The main operators

Domestic incumbents

• LG Uplus — operates the country’s largest single data center, the 165 MW Pyeongchon Mega Center in Anyang. A second Pyeongchon facility opened in October 2023. LG is investing a further KRW 1.2 trillion (roughly USD 900 million) in a new campus in Paju, north of Seoul.
• KT Cloud — the cloud subsidiary of telecoms group KT. KT has a 15-year deal worth USD 450 million to supply Microsoft with network and data center infrastructure.
• SK Broadband / SK Telecom — part of SK Group, which is the lead consortium member on the government’s flagship 5 GW Ulsan mega-campus, targeted for completion by 2029.
• Naver Cloud — Naver, Korea’s dominant search and e-commerce company, announced a 1 GW data center in Sejong City (the planned administrative capital south of Seoul) in November 2025.
• Kakao — Korea’s messaging and fintech conglomerate; a member of the government’s AIDC Alliance, which also includes Samsung SDS, NHN Cloud, and others.

International operators

• Equinix — operates the SL1 and SL2 IBX (International Business Exchange) facilities in Seoul and is developing SL2x and SL3x as hyperscale xScale campuses (combined target: more than 45 MW) in a joint venture with GIC, Singapore’s sovereign wealth fund.
• STT GDC — Singapore-based operator that launched a 30 MW data center in South Korea in 2024.
• Digital Realty — expanding in Asia-Pacific; check the company’s investor relations pages for current Korea-specific MW commitments, as pipeline figures are updated quarterly.
• Hyperscalers (Microsoft, Google, AWS) — all three have announced or expanded Korean cloud regions. Microsoft is the anchor customer for KT’s infrastructure deal. Exact owned-and-operated MW figures are not publicly disclosed by the companies; check their official Korea-region announcements for the latest.

Largest announced projects

• SK Group — Ulsan: 5 GW phase 1 (2029 target), scaling to 15 GW by 2035. Largest announced single-group commitment.
• GS Group — Donghae (East Sea coast): 2.4 GW, phase 1 by 2029.
• Naver — Sejong City: 1 GW, announced November 2025.
• Equinix SL2x / SL3x — Hyangdong, Goyang: 45+ MW combined (hyperscale-focused), phase completion targeting 2024–2025.

What it means for you

Workers and job-seekers: The build-out is creating demand for electrical engineers, data center technicians, and project managers. Most construction roles for the mega-projects in Ulsan, Donghae, and Sejong will be outside Seoul; check provincial government job boards and the hiring pages of SK, GS, and Naver Cloud.

Investors: The government’s KRW 550 trillion phase-1 plan involves SK Group, GS Group, and Naver as lead private investors. These are publicly listed or affiliated with publicly listed entities (SK Telecom: KRX 017670, Naver: KRX 035420, LG Uplus: KRX 032640). This is not investment advice; before making any decision, consult a licensed financial adviser and read the companies’ own disclosures, since pipeline commitments are not guarantees of revenue.

Foreign businesses and landlords: Demand for industrial land and heavy-power-capacity sites near nuclear plants and new transmission lines in South Chungcheong and South Gyeongsang is rising. If you own or are considering industrial property in these regions, the government’s decentralisation policy is a material factor worth tracking through the Ministry of Land, Infrastructure and Transport.

Electricity consumers: The eleven new regional electricity zones created in August 2026 mean industrial power tariffs vary by province for the first time. If your business consumes significant electricity and is flexible about location, the KEPCO rate schedules are now worth comparing across regions.

FAQ

Why does Korea need so many data centers so fast?

AI model training and inference require enormous computing power, and demand from Korean conglomerates, cloud providers, and foreign hyperscalers all surged at the same time. Korea also has stable political institutions, a well-developed fibre network, and proximity to semiconductor fabs — factors that make it attractive to operators who need low-latency connections to chips.

What is a Power Grid Impact Assessment and who has to do one?

A Power Grid Impact Assessment is a formal review by KEPCO or its subsidiaries of whether connecting a large new load will destabilise the local grid. Until the 2026 special act, all large data centers had to complete one regardless of location. The new law exempts qualifying AI data centers built outside the Seoul Capital Region from this requirement, which can cut two to three years from the approval timeline.

Will all these projects actually get built?

Many announced capacity figures are government targets or consortium pledges, not signed construction contracts. Phase-1 completion dates (2029) depend on grid infrastructure, land acquisition, and financing closing on schedule. Track progress through official Ministry of Science and ICT announcements and the quarterly filings of publicly listed operators; the gap between announced and operational capacity is historically large in this sector.

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