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.
Theia Market Signal Identification - AI AssistedJoliet, 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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