Jefferson County, New York
Jefferson County, New York has 78 power projects in the FieldProspects database: 69 operating plants totaling 255.5 MW and 9 planned projects totaling 998 MW. No data center record lists the county. Solar leads with 843.6 MW across 23 projects.
Jefferson County and its neighbors
Counties shaded by data center MW on record, planned to operating. 3 of its 3 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 Jefferson County. 9 projects in the queue would add 998 MW to the 255.5 MW operating today.
Technology mix
78 projects, 1.3 GW planned and operating
Power generation in the county
69 plants operate inside Jefferson County, 255.5 MW. The queue adds 998 MW across 9 projects.
Operating and planned generation by technology
MW in Jefferson County
View as table
| Technology | Status | Projects | MW |
|---|---|---|---|
| Solar | Operating | 16 | 65.6 |
| Solar | Planned | 7 | 778 |
| Battery Storage | Operating | 4 | 20 |
| Battery Storage | Planned | 2 | 220 |
| Hydro | Operating | 43 | 100.6 |
| Natural Gas | Operating | 2 | 62.9 |
| Landfill Gas | Operating | 4 | 6.4 |
Planned generation by listed in-service year
MW. Years before 2026 are past due.
View as table
| Year | Planned projects | MW |
|---|---|---|
| 2027 | 2 | 219 |
| 2028 | 4 | 279 |
| 2029 | 3 | 500 |
Jefferson County against its neighbors
St Lawrence County has the most data center MW among the neighbors, 4.5 GW. 2 of the 3 have more generation operating than data center MW on record.
| County | Data center records | Data center MW | Operating generation MW | Planned generation MW | Data center MW per MW operating |
|---|---|---|---|---|---|
| St Lawrence County | 6 | 972 | 3.2x | ||
| Oswego County | 0 | 59 | 0x | ||
| Lewis County | 0 | 125 | 0x | ||
| Jefferson County this page | 0 | 998 | 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.
4 counties shownWhat changed since June 4, 2026
3 projects in Jefferson County moved between the two snapshots. Counts and MW are below; the projects themselves are for members.
Every change in Jefferson 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 Jefferson County
Project name, developer, status, MW, in-service year and the developer’s contacts, for all 78 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 Jefferson County
We email you when a data center or power project in Jefferson 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 Jefferson County.
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