Data center fact sheet
Wisconsin
As of . Latest dated change shown: Sep 14, 2026. Source: Data Center Census (datacentercensus.com), CC BY 4.0.
- Tracked projects
- 9
- 1 rumored, 1 proposed, 2 under construction, 1 operating, 1 paused, 3 cancelled
- Planned capacity
- 1.52 GW
- 2 projects publish a figure; 4 projects publish none; 3 cancelled or denied not counted
- Moratorium actions
- 3
- Upcoming hearings
- 0
Projects
| Project | Status | Planned capacity | Developer |
|---|---|---|---|
| Port Washington (Lighthouse) Data Center Campus Port Washington, Ozaukee County | Under construction | 1.3 GW | Vantage Data Centers |
| Viridian Data Center Campus (former GM/JATCO site) Janesville, Rock County | Cancelled | 800 MW | Viridian Partners (Viridian Acquisitions LLC) |
| Meta Beaver Dam Data Center Beaver Dam, Dodge County | Under construction | 220 MW | Meta |
| Cloverleaf, Greenleaf Greenleaf, Brown County | Cancelled | none published | Cloverleaf Infrastructure |
| Cloverleaf, Village of Wrightstown Wrightstown, Brown County | Rumored | none published | Cloverleaf Infrastructure |
| Menomonie Data Center (Balloonist LLC) Menomonie, Dunn County | Paused | none published | Balloonist LLC |
| Microsoft Fairwater Mount Pleasant, Racine County | none published | Microsoft | |
| Project Cornmaze Beloit, Rock County | Proposed | none published | Panattoni |
| QTS DeForest Data Center Campus DeForest, Dane County | Cancelled | none published | QTS Data Centers |
Pauses and local rules
| Jurisdiction | Action | When | Length |
|---|---|---|---|
| Village of Wrightstown[1] | Adopted | Jul 2026 | one year |
| Dane County[2] | Adopted | Jun 2026 | —, until Dec 2027 |
| Manitowoc County[3] | Adopted | Apr 2026 | 18 months |
- Dane County: Sub 1 to 2026 RES-039, 18-month moratorium on hyperscale data center zoning permits (adopted, Jun 4, 2026)
- Wausau: Wausau data center zoning ordinance (adopted, Jul 14, 2026)
Upcoming votes and hearings
No upcoming hearing on record. Agendas change; check with the body before attending.
Latest changes
- Sep 14, 2026 ATC refiles its application for the grid upgrades serving the campus, dropping a Trenton-Saukville line segment and restarting the PSC's six-month review (Port Washington (Lighthouse) Data Center Campus)[4]
- Aug 17, 2026 Oracle moves to voluntarily drop its Ozaukee County Circuit Court lawsuit challenging the Wisconsin PSC's credit rating requirements for data center developers (Port Washington (Lighthouse) Data Center Campus)[5]
- Aug 11, 2026 Village voters answer No to an advisory, non-binding referendum question on whether the village should authorize or participate in public improvements connected to large data center projects (Cloverleaf, Village of Wrightstown)[6]
- Aug 7, 2026 PSC requires ATC to restart its application for the $1.3B+ transmission line and five substations serving the campus (Port Washington (Lighthouse) Data Center Campus)[7]
- Jul 16, 2026 Microsoft signs 15-year electric service contract with We Energies (Microsoft Fairwater)[8]
- Jul 2, 2026 Three Sturtevant residents sue Microsoft in federal court over noise (Microsoft Fairwater)[9]
Notes
Planned capacity adds each record’s first published figure for projects not cancelled or denied; projects that publish none are never estimated. IT load is the power reaching computing equipment, so a total that includes it understates total power. Locations may be approximate where a record gives only a town or county. Counts cover tracked projects, not every data center.
Sources
- NBC 26, “Wrightstown adopts a one-year moratorium on data center projects”, Jul 8, 2026. https://www.nbc26.com/news/local-news/wrightstown-adopts-a-one-year-moratorium-on-data-center-projects
- Isthmus, “Dane County Board approves data center moratorium”, Jun 5, 2026. https://isthmus.com/news/news/dane-county-board-approves-data-center-moratorium/
- WPR, “Manitowoc County Board approves 18-month data center moratorium”, Apr 30, 2026. https://www.wpr.org/news/manitowoc-county-board-approves-18-month-data-center-moratorium
- Wisconsin Watch, “ATC restarts push for grid upgrades serving Port Washington data center”, Sep 15, 2026. https://wisconsinwatch.org/2026/09/wisconsin-port-washington-data-center-atc-restarts-push-grid-upgrades-transmission-utility/
- Wisconsin Watch, “Oracle drops lawsuit challenging Wisconsin data center credit rules”, Aug 17, 2026. https://wisconsinwatch.org/2026/08/oracle-drops-lawsuit-challenging-wisconsin-data-center-credit-rules/
- Spectrum News 1 (Wisconsin), “Voters in Wrightstown don't want large data center developments”, Aug 12, 2026. https://spectrumnews1.com/wi/milwaukee/news/2026/08/12/voters-wrightstown-referendum-large-data-center-developments
- Wisconsin Watch, “Wisconsin regulators send ATC back to the drawing board on data center connection project”, Aug 7, 2026. https://wisconsinwatch.org/2026/08/wisconsin-psc-regulators-data-center-connection-project-atc-back-to-drawing-board-port-washington/
- Wisconsin Watch, “Microsoft-We Energies contract retains provision PSC struck down”, Aug 6, 2026. https://wisconsinwatch.org/2026/08/wisconsin-we-energies-microsoft-data-center-contract-terms-conflict-psc-regulators-electricity/
- WPR, “Microsoft sued over noise complaints at new Mount Pleasant data center facility”, Jul 2, 2026. https://www.wpr.org/news/microsoft-sued-noise-complaints-at-new-mount-pleasant-data-center
Each project record lists all of its sources and excerpts. Cite as: Data Center Census, “Data center fact sheet: Wisconsin,” October 14, 2026, https://datacentercensus.com/fact-sheets/wisconsin.