Green Lake County, Wisconsin: Power, Data Centers and the Local Economy
Home to Berlin, Brooklyn and Markesan
No data center or power plant project is on record in Green Lake County, but the national build-out still reaches it through its utility bill, its labor market and the projects next door. Green Lake County is home to Berlin, Brooklyn, Markesan and Princeton. Next door, Columbia County has 500 MW of planned generation. Construction employs 248, down 9.8% since 2019. Its power plants have 2 MW of capacity, 100% of it other technologies. Wisconsin Power & Light Co is the largest utility serving Green Lake County, one of 3 with territory here. Its residential customers paid an average 16.89¢/kWh in 2024, above the 13.25¢ median for Wisconsin utilities.
Cities and towns in Green Lake County
Green Lake County is home to Berlin, Brooklyn, Markesan and Princeton.
Unincorporated communities (governed by the county): Dalton.
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 Green Lake County
1st = the most. Ranks cover counties with a value on record.
| Measure | Then | Now | Change | Rank in Wisconsin |
|---|---|---|---|---|
| Population (2020 → 2025) | 19,016 | 19,305 | ▲ 1.5% | 55th of 72 by size |
| Total jobs (2019 → 2025) | 5,882 | 5,835 | ▼ 0.8% | 40th of 72 by growth |
| Average annual pay (2019 → 2025) | $39,776 | $50,586 | ▲ 27.2% | — |
| Construction jobs (2019 → 2025) | 275 | 248 | ▼ 9.8% | 58th of 61 by growth |
| Unemployment rate (2019 → August 2026) | 3.8% | 3.4% | ▼ 0.4pts | — |
| Generating capacity added since 2019 | — | 0 MW | — | |
| Generating capacity retired since 2019 | — | 0 MW | — |
Unemployment was 3.4% in August 2026, against 3.8% in 2019. Employers here counted 5,835 jobs in 2025, down 0.8% from 2019. 19,305 people live here, up 1.5% since 2020.
Who powers Green Lake County
Utilities with service territory in Green Lake County
| Utility | Ownership | Service | Residential customers (systemwide) | Residential price, 2024 | Commercial share of sales |
|---|---|---|---|---|---|
| Wisconsin Power & Light Co | Investor Owned | Bundled | 437,211 | 16.89¢ | 22% |
| Adams-Columbia Electric Coop | Cooperative | Bundled | 35,910 | 17.63¢ | 16% |
| City of Princeton - (WI) | — | — | — | — | — |
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 |
|---|---|---|
| Other technologies | 2 MW | 100% |
| Largest plants | Owner | Technology | MW | Since |
|---|---|---|---|---|
| Berlin Landfill Gas | WM Renewable Energy LLC | Other technologies | 2 MW | 2001 |
The Green Lake County labor market
| Industry (2025) | Jobs | Average pay | Concentration vs U.S. |
|---|---|---|---|
| All industries | 5,835 | $50,586 | 1.00 |
| Construction | 248 | $72,032 | 0.80 |
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 Green Lake County
No data center, local measure or delayed project is on record in Green Lake County. Wisconsin has 49 local measures on record statewide, and 2 neighboring counties have one: Dodge County, Winnebago County.
Green Lake County and its neighbors
Of the 6 counties that border Green Lake County, Columbia 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 |
|---|---|---|---|---|---|---|
| Green Lake County | 19,305 | ▼ 0.8% | 2 MW | — | — | — |
| Columbia County | 58,132 | ▼ 4.2% | 1,300 MW | 500 MW | — | — |
| Dodge County | 89,097 | ▲ 3.7% | 337 MW | — | 1 | 1 |
| Fond du Lac County | 104,669 | ▼ 5.8% | 608 MW | — | 1 | — |
| Marquette County | 15,927 | ▲ 0.1% | — | — | 1 | — |
| Waushara County | 25,223 | ▼ 6.3% | 99 MW | 360 MW | — | — |
| Winnebago County | 174,218 | ▲ 0.4% | 378 MW | — | — | 1 |
More of Wisconsin
Green Lake County, answered from the record
Who provides electricity in Green Lake County, Wisconsin?
3 utilities have service territory in Green Lake County in the EIA-861 2024 report: Wisconsin Power & Light Co, Adams-Columbia Electric Coop, City of Princeton - (WI). The largest, Wisconsin Power & Light Co, charged residential customers 16.89¢/kWh on average in 2024.
What power plants are in Green Lake County?
1 operating plant with 2 MW of capacity. The largest is Berlin Landfill Gas (2 MW, other technologies).
Are there data centers in Green Lake County?
The SAVRN Data Center Map has no data center in Green Lake County. The nearest activity on record is next door in Columbia County.
Is Green Lake County adding jobs?
Employers counted 5,835 jobs in 2025 against 5,882 in 2019 (-0.8%, BLS QCEW). Construction went from 275 to 248.
Does Green Lake County have a data center moratorium?
No county-level measure is on record for Green Lake County. Wisconsin has 49 local measures statewide, listed on the state page.