Joliet Approves Largest US Data Center with $20 Billion Investment in Illinois
The Joliet Technology Center, approved on March 20, 2026, represents a significant investment of $20 billion and a capacity of 1.8 GW. This project is part of a broader trend in the U.S. towards large-scale data center development, driven by increasing demand for AI infrastructure.
Joliet, Illinois, has approved the construction of the Joliet Technology Center, the largest data center in the U.S. by capacity, with a total investment of $20 billion and 1.8 GW of power at full buildout. This facility will feature 24 two-story buildings covering 6.9 million square feet and is expected to create 10,000 peak construction jobs over five years, plus 700 permanent positions.
The project will generate $2.1 billion in tax revenue over 30 years. Concerns regarding environmental impact and infrastructure were raised during a public hearing, but the potential economic benefits were emphasized by supporters.
The project aligns with a national trend of increasing data center capacity amid growing AI demands, highlighting the need for robust energy solutions. The construction is scheduled to begin between late 2026 and early 2027.
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