The SK AI Data Center Ulsan is going up inside the Ulsan Mipo National Industrial Complex on South Korea's south-eastern coast, on a site of about 66,000 m², or 20,000 pyeong. SK Telecom and SK Ecoplant are building and will own it, with Amazon Web Services as co-investor and anchor and Ulsan Metropolitan City as a project party. The announced first phase is 103 MW carrying 60,000 GPUs, in operation from 2027, against a stated roadmap towards a gigawatt; the combined SK and AWS commitment is put at around 7 trillion won. The building will rise five storeys. A launch ceremony was held at the Ulsan Exhibition and Convention Center on 20 June 2025, ground was broken on 29 August 2025, and construction was still in its earliest stage at the end of October 2025. It is billed as the largest AI data centre outside the Seoul capital region, and the project plan contemplates future supply from floating offshore wind.
SK Telecom and SK Ecoplant, with Amazon Web Services as co-investor and anchor and Ulsan Metropolitan City as a project party. The asset belongs to SK Group.
What capacity is announced for the Ulsan project?
103 MW in the first phase, carrying 60,000 GPUs, with operation targeted for 2027 and a public roadmap towards one gigawatt.
When did construction start at Ulsan Mipo?
Ground was broken on 29 August 2025, following a launch ceremony at the Ulsan Exhibition and Convention Center on 20 June 2025. Work was still at an early stage in late October 2025.
How large is the Ulsan site?
About 66,000 m², roughly 20,000 pyeong, inside the Ulsan Mipo National Industrial Complex. The building is planned at five storeys above ground.
Why does the Ulsan build matter in the Korean market?
It is the largest AI data centre announced outside the Seoul capital region, and SK Telecom has put the employment attached to it at 78,000 jobs.