Illinois
Data centers in Lake County, Illinois
The Census tracks 1 data center project in Lake County, Illinois, with 1.55 GW of published capacity: 1 approved. 1 moratorium action recorded.
How many data centers are in Lake County?
The Census tracks 1 major project here as of Sep 22, 2026: 1 approved. They are in Grayslake. The largest by published capacity is T5 @ Chicago IV (1.55 GW).
Projects
| Project | Status | Capacity | Developer |
|---|---|---|---|
| T5 @ Chicago IV Grayslake, Lake County, IL | Approved | 1.55 GW | T5 Data Centers |
Moratoriums
| Jurisdiction | Action | Length | What the source says |
|---|---|---|---|
| Lake County Illinois · county |
Adopted Sep 8, 2026 |
eight months | Data centers in unincorporated Lake County. Lake County, IllinoisSource excerpt“The Lake County Board today approved an eight-month moratorium on data centers in unincorporated Lake County” |
Recent changes
| Date | What changed | Project |
|---|---|---|
| Sep 1, 2026 | Village issues first building permit, for an 800,000-square-foot facility Lake and McHenry County Scanner | T5 @ Chicago IV |
| Aug 2026 | Preservation of Community Well-being Collective LLC and nine Lake County residents sue to challenge the village's approvals Lake and McHenry County Scanner | T5 @ Chicago IV |
| May 2025 | Grayslake Village Board completes approvals of the campus (approved between September 2024 and May 2025) Lake and McHenry County Scanner | T5 @ Chicago IV |
| May 2, 2024 | T5 announces a 480 MW data center campus in Grayslake T5 Data Centers | T5 @ Chicago IV |
Lake County data centers: common questions
How many data centers are in Lake County, Illinois?
The Census tracks 1 major data center project in Lake County as of Sep 22, 2026: 1 approved. That covers major sourced projects, not every smaller colocation or enterprise facility.
What is the biggest data center project in Lake County?
By published planned capacity, T5 @ Chicago IV in Grayslake, at 1.55 GW. Its status is approved.
Is there a data center moratorium in Lake County?
Lake County adopted a data center moratorium (Sep 8, 2026), eight months. Details and sources are in the moratorium tracker.
This page collects the county-level record: every tracked project, moratorium and local rule we can source for Lake County. See all Illinois projects or look up projects near your ZIP code.
Cite this page
Last updated Sep 22, 2026. Figures may change as records are updated — include the date you retrieved them.
| APA | Data Center Census. (2026). Data centers in Lake County, Illinois. Retrieved from https://datacentercensus.com/us/illinois/lake-county |
|---|---|
| MLA | “Data centers in Lake County, Illinois.” Data Center Census, Sep 22, 2026, https://datacentercensus.com/us/illinois/lake-county. |
| Link | https://datacentercensus.com/us/illinois/lake-county |
Republishing a figure or table? Attribute it to Data Center Census with a link to this page. The underlying data is downloadable as JSON and CSV; the press kit has standing figures and contact details.