Illinois
Data centers in Illinois
The Census tracks 3 major data center projects in Illinois, with 3.98 GW of planned capacity: 3 approved.
Illinois data center projects
| Project | Status | Capacity | Developer | Last update |
|---|---|---|---|---|
| Joliet Technology Center Joliet, Will County |
Approved | 1.8 GW | Hillwood, PowerHouse Data Centers | Aug 17, 2026 |
| T5 @ Chicago IV Grayslake, Lake County |
Approved | 1.55 GW | T5 Data Centers | Sep 1, 2026 |
| CyrusOne Sangamon County Data Center Waverly, Sangamon County |
Approved | 634 MW | CyrusOne | Jul 6, 2026 |
Recent changes in Illinois
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T5 @ Chicago IV IL
Village issues first building permit, for an 800,000-square-foot facility Lake and McHenry County Scanner -
Joliet Technology Center IL
City and developers' motions to dismiss set for a Sept. 8 hearing before Will County Judge Victoria Breslan Shaw Local (The Herald-News) -
T5 @ Chicago IV IL
Preservation of Community Well-being Collective LLC and nine Lake County residents sue to challenge the village's approvals Lake and McHenry County Scanner -
CyrusOne Sangamon County Data Center IL
Waverly residents sue Sangamon County in circuit court to overturn the approval Illinois Times -
CyrusOne Sangamon County Data Center IL
CyrusOne signs state incentive MOU requiring $500 million investment by March 2031 Illinois Times -
Joliet Technology Center IL
Residents and Joliet Residents For Responsible Growth sue city and developers in Will County Shaw Local (The Herald-News) -
CyrusOne Sangamon County Data Center IL
County Board votes 15-13 to table the conditional use permit NPR Illinois -
Joliet Technology Center IL
City Council approves project 8-1 (Councilwoman Suzanna Ibarra dissenting) Shaw Local (The Herald-News) -
Joliet Technology Center IL
City Council public hearing on the proposal (lawsuit alleges residents were denied due process) Shaw Local (The Herald-News)
How many data centers are in Illinois?
This page counts the major projects the Census has researched and sourced: 3 as of Sep 22, 2026. It does not yet include every smaller colocation or enterprise facility, so the total number of buildings in Illinois is higher. We add projects as they are announced or found in public filings.
Counties with tracked projects
Lake County · Sangamon County · Will County
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