Nantucket County, Massachusetts: Power, Data Centers and the Local Economy
Home to Nantucket
No data center or power plant project is on record in Nantucket County, but the national build-out still reaches it through its utility bill, its labor market and the projects next door. Nantucket County and the city of Nantucket share the same boundaries. Unemployment was 2.7% in August 2026, against 4.3% in 2019. Employers here counted 8,675 jobs in 2025, up 11.4% from 2019 (the fastest growth of 14 Massachusetts counties). 7 MW has retired here since 2019, including Nantucket Hybrid (petroleum, 7 MW, 2019). 22 MW of that came online in 2019 or later, mostly petroleum.
Cities and towns in Nantucket County
Nantucket County and the city of Nantucket share the same boundaries.
Unincorporated communities (governed by the county): Madaket, Nantucket, Siasconset.
Residents are 2025 Census estimates for the part of each city, town or township inside this county. Census publishes no annual estimate for unincorporated communities.
What changed in Nantucket County
1st = the most. Ranks cover counties with a value on record.
| Measure | Then | Now | Change | Rank in Massachusetts |
|---|---|---|---|---|
| Population (2020 → 2025) | 14,240 | 14,758 | ▲ 3.6% | 14th of 14 by size |
| Total jobs (2019 → 2025) | 7,788 | 8,675 | ▲ 11.4% | 1st of 14 by growth |
| Average annual pay (2019 → 2025) | $59,612 | $82,938 | ▲ 39.1% | — |
| Unemployment rate (2019 → August 2026) | 4.3% | 2.7% | ▼ 1.6pts | — |
| Generating capacity added since 2019 | — | 22 MW | — | |
| Generating capacity retired since 2019 | — | 7 MW | — |
Its power plants have 22 MW of capacity, 73% of it petroleum. Nantucket Electric Co is the largest utility serving Nantucket County. Its residential customers paid an average 35.11¢/kWh in 2024, above the 16.18¢ median for Massachusetts utilities. 14,758 people live here, up 3.6% since 2020.
Who powers Nantucket County
Net change in operating capacity since 2019: +15 MW. Colors follow the fuel legend above.
Utilities with service territory in Nantucket County
| Utility | Ownership | Service | Residential customers (systemwide) | Residential price, 2024 | Commercial share of sales |
|---|---|---|---|---|---|
| Nantucket Electric Co | Investor Owned | Bundled | 12,823 | 35.11¢ | 11% |
Customer counts, prices and sales shares cover each utility's whole system in the state, not only this county. Commercial sales include data centers.
Operating power plants 1
| Technology | Capacity | Share |
|---|---|---|
| Petroleum | 16 MW | 73% |
| Battery storage | 6 MW | 27% |
| Largest plants | Owner | Technology | MW | Since |
|---|---|---|---|---|
| Nantucket Hybrid | Nantucket Electric Co | Petroleum | 22 MW | 2019 |
Retired since 2019
| Plant | Technology | MW | Year |
|---|---|---|---|
| Nantucket Hybrid | Petroleum | 7 MW | 2019 |
The Nantucket County labor market
| Industry (2025) | Jobs | Average pay | Concentration vs U.S. |
|---|---|---|---|
| All industries | 8,675 | $82,938 | 1.00 |
Concentration is the BLS location quotient: 1.0 means the industry holds the same share of local jobs as it does nationally. Industry rows count private employers; cells BLS suppresses are left out.
Data centers and local rules in Nantucket County
No data center, local measure or delayed project is on record in Nantucket County. Massachusetts has 17 local measures on record statewide.
More of Massachusetts
Nantucket County, answered from the record
Who provides electricity in Nantucket County, Massachusetts?
1 utility has service territory in Nantucket County in the EIA-861 2024 report: Nantucket Electric Co. The largest, Nantucket Electric Co, charged residential customers 35.11¢/kWh on average in 2024.
What county is Nantucket, MA in?
Nantucket is in Nantucket County, Massachusetts. About 14,758 people live there (2025 Census estimate).
What power plants are in Nantucket County?
1 operating plant with 22 MW of capacity. The largest is Nantucket Hybrid (22 MW, petroleum).
Are there data centers in Nantucket County?
The SAVRN Data Center Map has no data center in Nantucket County.
Is Nantucket County adding jobs?
Employers counted 8,675 jobs in 2025 against 7,788 in 2019 (+11.4%, BLS QCEW).
Does Nantucket County have a data center moratorium?
No county-level measure is on record for Nantucket County. Massachusetts has 17 local measures statewide, listed on the state page.