Marion County, Illinois
Marion County, Illinois has 10 power projects in the FieldProspects database: 5 operating plants totaling 372 MW and 5 planned projects totaling 648 MW. No data center record lists the county. Solar leads with 301 MW across 5 projects. 1 planned project is past its listed in-service date.
Marion County and its neighbors
Counties shaded by data center MW on record, planned to operating. 5 of its 6 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
more planned than operating generation in Marion County. 5 projects in the queue would add 648 MW to the 372 MW operating today, and one of them is past its listed in-service date.
Technology mix
10 projects, 1 GW planned and operating
Power generation in the county
5 plants operate inside Marion County, 372 MW of solar and natural gas. The queue adds 648 MW across 5 projects, and one of them is past its listed in-service date.
Operating and planned generation by technology
MW in Marion County
View as table
| Technology | Status | Projects | MW |
|---|---|---|---|
| Solar | Operating | 3 | 102 |
| Solar | Planned | 2 | 199 |
| Natural Gas | Operating | 2 | 270 |
| Battery Storage | Planned | 1 | 200 |
| Solar + Storage (Hybrid) | Planned | 1 | 150 |
| Transmission | Planned | 1 | 99 |
Planned generation by listed in-service year
MW. Years before 2026 are past due.
View as table
| Year | Planned projects | MW |
|---|---|---|
| 2025 | 1 | 99 |
| 2026 | 2 | 250 |
| 2027 | 0 | 0 |
| 2028 | 0 | 0 |
| 2029 | 0 | 0 |
| 2030 | 1 | 99 |
| 2031 | 1 | 200 |
Marion County against its neighbors
None of the 5 neighboring counties with a page lists a data center record. Clay County has the most operating generation among them, 726 MW.
| County | Data center records | Data center MW | Operating generation MW | Planned generation MW | Data center MW per MW operating |
|---|---|---|---|---|---|
| Clay County | 0 | 1,227 | 0x | ||
| Marion County this page | 0 | 648 | 0x | ||
| Fayette County | 0 | 1,198 | 0x | ||
| Clinton County | 0 | 228 | 0x | ||
| Washington County | 0 | 735 | 0x | ||
| Jefferson County | 0 | 555 | 0x |
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.
6 counties shownWhat changed since June 4, 2026
1 project in Marion County moved between the two snapshots. Counts and MW are below; the projects themselves are for members.
Every change in Marion County
Project, what changed, technology, MW and the dates that moved, for all 1 change.
| 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 Marion County
Project name, developer, status, MW, in-service year and the developer’s contacts, for all 10 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 Marion County
We email you when a data center or power project in Marion 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 Marion County.
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