Middlesex County, Massachusetts
Middlesex County, Massachusetts has 29 MW of data centers on record, planned to operating, across 2 records, against 475.9 MW of generation operating inside the county. The queue adds 1.7 GW of planned generation across 6 projects. That is 49.9% of Massachusetts's data center MW.
Middlesex County and its neighbors
Counties shaded by data center MW on record, planned to operating. 4 of its 4 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 generation operating in the county is matched by data center MW on record: 29 MW of data centers against 475.9 MW of plants, with 1.7 GW more planned.
Data centers by status
2 records, 29 MW
The data center pipeline
None of the 2 records lists a year online or expected, so the pipeline is shown by developer only.
Who is building in Middlesex
Data center developers by MW on record. Top 2 of 2.
View as table
| Developer | Sites | MW |
|---|---|---|
| Centersquare (formerly Evoque) | 1 | 15 |
| Tierpoint | 1 | 14 |
Power generation in the county
84 plants operate inside Middlesex County, 475.9 MW. The queue adds 1.7 GW across 6 projects.
Operating and planned generation by technology
MW in Middlesex County
View as table
| Technology | Status | Projects | MW |
|---|---|---|---|
| Battery Storage | Operating | 13 | 41.8 |
| Battery Storage | Planned | 5 | 1,717.2 |
| Natural Gas | Operating | 9 | 276 |
| Solar | Operating | 46 | 106.2 |
| Oil | Operating | 10 | 26.8 |
| Hydro | Operating | 6 | 25.1 |
| Other | Planned | 1 | 12 |
Planned generation by listed in-service year
MW. Years before 2026 are past due.
View as table
| Year | Planned projects | MW |
|---|---|---|
| 2026 | 1 | 5 |
| 2027 | 1 | 12 |
| 2028 | 4 | 1,712.2 |
Middlesex County against its neighbors
Suffolk County has the most data center MW among the neighbors, 20.1 MW, 69% of Middlesex County's. 4 of the 4 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 |
|---|---|---|---|---|---|
| Middlesex County this page | 2 | 1,729 | 0.06x | ||
| Suffolk County | 3 | 800 | 0.07x | ||
| Essex County | 1 | 430 | 0x | ||
| Worcester County | 3 | 769 | 0x | ||
| Norfolk County | 0 | 781 | 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.
5 counties shownWhat changed since June 4, 2026
4 projects in Middlesex County moved between the two snapshots. Counts and MW are below; the projects themselves are for members.
Every change in Middlesex County
Project, what changed, technology, MW and the dates that moved, for all 4 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 Middlesex County
Campus or project name, developer, status, MW, year and the developer’s contacts, for all 92 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 Middlesex County
We email you when a data center or power project in Middlesex 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 Middlesex County.
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