Williamson County, Illinois
Williamson County, Illinois has 17 power projects in the FieldProspects database: 13 operating plants totaling 266.3 MW and 4 planned projects totaling 262 MW. No data center record lists the county. Solar + Storage (Hybrid) leads with 250 MW across 1 project.
Williamson County and its neighbors
Counties shaded by data center MW on record, planned to operating. 3 of its 5 neighboring counties have pages of their own. The rest are in the member database.
Data center records planned, under construction and operating, data as of October 8, 2026.Hover a county for its numbers
of the county's operating generation is in the queue as new capacity: 262 MW planned across 4 projects against 266.3 MW operating, 1 of the planned project already late.
Technology mix
17 projects, 528.3 MW planned and operating
Power generation in the county
13 plants operate inside Williamson County, 266.3 MW. The queue adds 262 MW across 4 projects, and one of them is past its listed in-service date.
Operating and planned generation by technology
MW in Williamson County
View as table
| Technology | Status | Projects | MW |
|---|---|---|---|
| Solar + Storage (Hybrid) | Planned | 1 | 250 |
| Natural Gas | Operating | 2 | 150 |
| Coal | Operating | 3 | 99 |
| Solar | Operating | 8 | 17.3 |
| Solar | Planned | 3 | 12 |
Planned generation by listed in-service year
MW. Years before 2026 are past due.
View as table
| Year | Planned projects | MW |
|---|---|---|
| 2025 | 1 | 250 |
| 2026 | 3 | 12 |
Williamson County against its neighbors
None of the 3 neighboring counties with a page lists a data center record. Saline County has the most operating generation among them, 270 MW.
| County | Data center records | Data center MW | Operating generation MW | Planned generation MW | Data center MW per MW operating |
|---|---|---|---|---|---|
| Saline County | 0 | 1,139 | 0x | ||
| Williamson County this page | 0 | 262 | 0x | ||
| Jackson County | 0 | 251 | 0x | ||
| Johnson County | 0 | 836 | no operating MW |
Data center MW counts records planned, under construction and operating. Generation is inside the county only. Neighbors without a page have fewer than three projects on record.
4 counties shownWhat changed since June 4, 2026
3 projects in Williamson County moved between the two snapshots. Counts and MW are below; the projects themselves are for members.
Every change in Williamson County
Project, what changed, technology, MW and the dates that moved, for all 3 changes.
| Project | Change | Technology | MW | Previous date | New date |
|---|---|---|---|---|---|
Rows are hidden on public pages. Members see the project behind each change, its developer and the dates that moved.
Every record in Williamson County
Project name, developer, status, MW, in-service year and the developer’s contacts, for all 17 records. Filter, sort and export to Excel.
| Project or campus | Developer | Status | MW | Year | Contacts |
|---|---|---|---|---|---|
Rows are hidden on public pages. Members see every field and can export up to 1,000 rows a month on Solo, unlimited on Unlimited.
Get alerts for Williamson County
We email you when a data center or power project in Williamson County is added, changes status, signs an interconnection agreement or slips its date. One email per snapshot, only when something changed.
Open every campus, project and contact in Williamson County.
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