Illinois Data Centers

Live tracking of every data center project in Illinois (operational, under construction, announced, and permitted) with developer, tenant, capacity, and supply-chain links.

Illinois's biggest plans sit in the Chicago suburbs and beyond. PowerHouse and Hillwood's 1.8 GW Joliet Technology Center is permitted, T5 is building a 1.2 GW campus in Grayslake, and Compass is turning the former Sears headquarters in Hoffman Estates into a 200 MW campus. Meta operates in DeKalb, CyrusOne is building in Aurora and Yorkville, and Monarch has announced a 1.4 GW campus in Rockford.

Data Center Index tracks 15 named data center campuses in Illinois (large sites with a source, not every building): 3 operating, 4 under construction, and 8 announced or permitted. The pipeline adds up to 6.2 GW of planned capacity. The grid is operated by PJM, which runs the interconnection queue. Below: every tracked project in Illinois, ranked by build status, followed by the public companies whose data center revenue is most exposed to this market.

Tracked data center projects in Illinois

Frequently asked questions

How many data centers are in Illinois?
Data Center Index tracks 15 named data center campuses in Illinois as of 2026: 3 operating, 4 under construction, and 8 announced or permitted. Coverage is named campuses with a published source, not every building.
How much data center capacity does Illinois have?
210 MW is operating, with 6.2 GW in the announced and under-construction pipeline. Of the 10 Illinois campuses with a capacity figure, 0 are filed, 7 stated and 3 estimated. Filed means a permit, utility filing or SEC filing states the figure. Stated means the developer or the press states it. Estimated means we modeled or inferred it, and the site marks it "est.". Filed and stated figures carry the date of the newest source behind them.
What is the largest data center in Illinois?
Joliet Technology Center in Joliet is the largest tracked campus in Illinois at 1.8 GW, developed by PowerHouse Data Centers / Hillwood. The developer or the press states that capacity, in a source dated September 21, 2026.
Who is building data centers in Illinois?
The most active developers in Illinois by tracked campus count are CyrusOne (3 campuses), Meta (1 campus), Aligned Data Centers (1 campus). Every campus page lists its developer, tenant and the source that names them.
Which grid operator serves Illinois data centers?
PJM runs the grid and the interconnection queue for Illinois, so new campus power requests are approved on its timeline.

Public companies exposed to Illinois

These public companies have tracked data-center projects in Illinois as developers, tenants, or operators. Use the watchlist to compare them side by side, or click through for capex history and supplier exposure.

Other data center markets

Tracked US markets, ranked by pipeline capacity: