Addison County, Vermont: Power, Data Centers and the Local Economy
Home to Middlebury, Bristol and Ferrisburgh
New generation is lining up in Addison County. Addison County is home to Middlebury, Bristol, Ferrisburgh and Vergennes. 50 MW of new generation is planned here across 1 unit, led by Viridis Solar (solar), the largest pipeline among Vermont's counties. Construction employs 1,047, up 12.9% since 2019. 4 MW has retired here since 2019, including Vergennes 9 (petroleum, 4 MW, 2021). 12 MW of that came online in 2019 or later, mostly solar.
Cities and towns in Addison County
Addison County is home to Middlebury, Bristol, Ferrisburgh and Vergennes.
Unincorporated communities (governed by the county): Bristol, East Middlebury, Lincoln, Middlebury, New Haven, South Lincoln.
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 Addison County
1st = the most. Ranks cover counties with a value on record.
| Measure | Then | Now | Change | Rank in Vermont |
|---|---|---|---|---|
| Population (2020 → 2025) | 37,362 | 38,048 | ▲ 1.8% | 7th of 14 by size |
| Total jobs (2019 → 2025) | 14,930 | 15,570 | ▲ 4.3% | 4th of 14 by growth |
| Average annual pay (2019 → 2025) | $49,632 | $62,929 | ▲ 26.8% | — |
| Construction jobs (2019 → 2025) | 927 | 1,047 | ▲ 12.9% | 3rd of 6 by growth |
| Unemployment rate (2019 → August 2026) | 2.1% | 2.3% | ▲ 0.2pts | — |
| Generating capacity added since 2019 | — | 12 MW | — | |
| Generating capacity retired since 2019 | — | 4 MW | — | |
| Planned generation (Aug 2026) | — | 50 MW | 108% of today's fleet | 1st of 4 by size |
Employers here counted 15,570 jobs in 2025, up 4.3% from 2019 (the 4th fastest growth of 14 Vermont counties). Its power plants have 46 MW of capacity, 49% of it hydro, the 8th largest fleet in Vermont. Green Mountain Power Corp is the largest utility serving Addison County, one of 2 with territory here. Its residential customers paid an average 22.09¢/kWh in 2024. Unemployment was 2.3% in August 2026, against 2.1% in 2019. 38,048 people live here, up 1.8% since 2020, 7th of 14 Vermont counties by population.
Who powers Addison County
Net change in operating capacity since 2019: +8 MW. Colors follow the fuel legend above.
Utilities with service territory in Addison County
| Utility | Ownership | Service | Residential customers (systemwide) | Residential price, 2024 | Commercial share of sales |
|---|---|---|---|---|---|
| Green Mountain Power Corp | Investor Owned | Bundled | 226,675 | 22.09¢ | 36% |
| Vermont Electric Cooperative, Inc | Cooperative | Bundled | 35,964 | 23.26¢ | 28% |
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 13
| Technology | Capacity | Share |
|---|---|---|
| Hydro | 23 MW | 49% |
| Solar | 19 MW | 41% |
| Battery storage | 3 MW | 6% |
| Other technologies | 1 MW | 3% |
| Largest plants | Owner | Technology | MW | Since |
|---|---|---|---|---|
| GMP Solar/Storage-Ferrisburgh Hybrid | Green Mountain Power Corp | Battery storage | 7 MW | 2019 |
| GMP Solar - Panton Hybrid | Green Mountain Power Corp | Battery storage | 6 MW | 2016 |
| Beldens | Green Mountain Power Corp | Hydro | 6 MW | 1913 |
| Huntington Falls | Green Mountain Power Corp | Hydro | 6 MW | 1988 |
| South Street - Middlebury | Bowser Road Solar Project 2021, LLC | Solar | 5 MW | 2023 |
| Weybridge | Green Mountain Power Corp | Hydro | 3 MW | 1951 |
Planned generation 1
| Plant | Technology | MW | Status | Year | Owner |
|---|---|---|---|---|---|
| Panton | Solar Photovoltaic | 50 MW | Approvals pending | 2028 | Viridis Solar |
Retired since 2019
| Plant | Technology | MW | Year |
|---|---|---|---|
| Vergennes 9 | Petroleum | 4 MW | 2021 |
The Addison County labor market
| Industry (2025) | Jobs | Average pay | Concentration vs U.S. |
|---|---|---|---|
| All industries | 15,570 | $62,929 | 1.00 |
| Construction | 1,047 | $67,451 | 1.27 |
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 Addison County
No data center, local measure or delayed project is on record in Addison County. Vermont has 3 local measures on record statewide.
Addison County and its neighbors
Of the 7 counties that border Addison County, Chittenden County carries the most build-out activity: data centers, planned generation and operating plants combined.
| County | Population | Jobs since 2019 | Operating MW | Planned MW | Data centers | Local measures |
|---|---|---|---|---|---|---|
| Addison County | 38,048 | ▲ 4.3% | 46 MW | 50 MW | — | — |
| Chittenden County | 169,115 | ▲ 0.5% | 196 MW | 16 MW | 6 | — |
| Essex County NY | 36,438 | ▲ 4.0% | 78 MW | — | — | — |
| Orange County | 30,002 | ▼ 0.9% | 15 MW | — | — | — |
| Rutland County | 59,653 | ▼ 5.4% | 35 MW | 20 MW | 1 | — |
| Washington County NY | 59,353 | ▼ 3.6% | 72 MW | — | — | — |
| Washington County | 59,652 | ▼ 1.2% | 66 MW | — | — | — |
| Windsor County | 57,312 | ▲ 0.2% | 89 MW | — | — | — |
More of Vermont
Addison County, answered from the record
Who provides electricity in Addison County, Vermont?
2 utilities have service territory in Addison County in the EIA-861 2024 report: Green Mountain Power Corp, Vermont Electric Cooperative, Inc. The largest, Green Mountain Power Corp, charged residential customers 22.09¢/kWh on average in 2024.
What power plants are in Addison County?
13 operating plants with 46 MW of capacity. The largest is GMP Solar/Storage-Ferrisburgh Hybrid (7 MW, battery storage).
How much new power is planned in Addison County?
50 MW across 1 units in the August 2026 EIA-860M inventory, 0 MW of it under construction or built. The largest owner is Viridis Solar.
Are there data centers in Addison County?
The SAVRN Data Center Map has no data center in Addison County. The nearest activity on record is next door in Chittenden County.
Is Addison County adding jobs?
Employers counted 15,570 jobs in 2025 against 14,930 in 2019 (+4.3%, BLS QCEW). Construction went from 927 to 1,047.
Does Addison County have a data center moratorium?
No county-level measure is on record for Addison County. Vermont has 3 local measures statewide, listed on the state page.