Wisconsin index · last changed 16 September 2026

Wisconsin data centers: what the public record shows.

Selected source-linked records are published below. This is not a complete inventory of Wisconsin data centers.

1 published DataCenterData record · evidence status shown per row37 licensed directory leads · not independently verifiedWI

Explore Wisconsin

Map, listings and checked facts.

Start with 37 licensed source leads, then inspect the separate public-evidence layer below. Licensed rows are not independently verified and are not a statewide census.

Wisconsin map

Reported locations in Wisconsin

37 licensed rows · 27 source localities · 4 map targets

Open interactive map

Source-reported points; some are approximate. Not parcel boundaries. Exact Approximate or representative Bounded nearby group

Browse 4 mapped areas as links

Map sources and method

The state outline is adapted from the U.S. Census Bureau 2025 cartographic boundary file. Facility coordinates are adapted from Compute Atlas by Edward Kubiak, edition 1.33.0, under CC BY 4.0. Outline and markers use one geographic projection before any explicitly disclosed readability offset. Exact singleton source anchors are never moved. A one-kilometre boundary tolerance prevents the simplified 1:20,000,000 outline from hiding legitimate border-area source points; farther conflicts are disclosed, not clamped. DataCenterData groups source-reported city coordinates only within a bounded map radius; the outline does not validate a facility record.

37 licensed rows27 reported city labels28 eligible organization labels

20source-reported operational 8source-reported proposed 5source-reported cancelled 2source-reported permitted 2source-reported under construction

Browse all 37 rows below. Licensed rows are not independently verified and remain separate from the checked public-evidence layer.

Madison 4 Milwaukee 4 Beaver Dam 2 Franklin 2 Janesville 2 Wisconsin Rapids 2 Appleton 1 Beloit 1 Caledonia 1 Carlton 1 Cassville 1 DeForest 1

Microsoft 3 Aventus Data Centers 2 Cloverleaf Infrastructure 2 Data Holdings LLC 2 US Signal 2 Cambrin LLC 1 CyberLynk Network, Inc. 1 Digital Power Optimization 1

APECS Data Center Campus (Former GM Assembly Plant)
Viridian Acquisitions LLC
Janesville · Rock County · Wisconsin

source-reported proposedPlanned 800 MWSource updated 18 August 2026approximate location

View facility →dcd-dir-001552
Ark Data Centers Green Bay (Harrison Campus)
Involta (rebranded Ark Data Centers, May 2024)
Harrison · Calumet County · Wisconsin

source-reported operationalPlanned 20 MWSource updated 26 July 2026exact location

View facility →dcd-dir-000096

Browse all 37 rows Check a claim about Wisconsin Search all evidence for Wisconsin

Wisconsin evidence at a glance

A few checked sites

Selected public evidence, not a statewide census. Each row shows whether it is independently source-linked, attributed, or unresolved; licensed leads remain separate.

Published project / campus: 1
Published facility / building: 0
Attributed or unresolved rows: 0
Licensed directory leads: 37 not independently verified
Capacity boundary stated: 0 of 1 published DataCenterData rows
Review timing: Audit through 11 September 2026 · next 12 March 2027

Known coverage gap

WEDC certification letters, application files and any award amounts were not located.

Browse all 37 Wisconsin licensed leads → · Why these counts differ →

Campuses

1 campus record. Names are as they appear on each record page.

Vantage Lighthouse CampusDeveloper: Vantage Data Centers

constructioncampus

UnknownNo independently supported figure

Port Washington Data Center Proposal →Gov. record

Where the records were checked

Statewide audit pending

A few checked sites

This is not a list of every data center in the state, and the number here is not a count of them. There are almost certainly more.

Statewide coverage is not complete. The records below are sourced; a full statewide count has not been published.

State research audit window ended 11 September 2026. Individual records and claims below show their own evidence dates and may be newer.

Next scheduled review: 12 March 2027.

1 independently source-linked project/campus record; 0 independently source-linked facility/building records; 0 attributed or unresolved rows. These counts use different units and must not be added together.

Source families checked, selected records and remaining gaps

These notes name selected records, say which kinds of public evidence were checked and show what remains missing. They do not add anything to the published counts.

economic development incentives — Checked
- WEDC certification letters, application files and any award amounts were not located.
- WEDC's wider press archive was not swept for other data center announcements because the current review did not include a broad discovery sweep.
Selected records
- Qualified Data Center Exemption (guidance 100318) · Wisconsin Department of Revenue
- Data Center Sales and Use Tax Exemption program page · Wisconsin Economic Development Corporation
- Meta, state and local officials announce $1 billion data center investment in Beaver Dam project · Wisconsin Economic Development Corporation
utility commission large load — Partly checked
- Every apps.psc.wi.gov docket page could not be retrieved during review, so no filings, electric service agreements, load forecasts or MW figures were read.
- Docket 6680-TE-115 and the ATC Ozaukee County interconnection docket were not read.
- Alliant and other utility large-load tariff filings could not be searched in the current review.
Selected records
- PSC Overhauls We Energies' Data Center Tariff, Makes Improvements to Protect Existing Customers · Public Service Commission of Wisconsin
environmental construction permits — Partly checked
- No statewide DNR air permit search was run for other data center generator permits (Microsoft Mount Pleasant, Meta Beaver Dam, colocation sites); the permit search portal was not queried because the current review did not include a broad discovery sweep and no direct query URL was known.
- Individual permit PDFs, the environmental analysis summary and the WEPA compliance determination were not downloaded.
- No generator megawatt total appears in the DNR pages read, so no generation capacity is recorded.
Selected records
- Port Washington Data Center Proposal — Environmental Impact Analysis · Wisconsin Department of Natural Resources
- Air Management Permit Tracking — facility 38402 · Wisconsin Department of Natural Resources
municipal planning assessor gis — Partly checked
- Port Washington and Kenosha municipal sites could not be retrieved during review and Beaver Dam's document centre refused connections, so no minutes, ordinances or staff reports were read for those cities.
- No assessor or GIS parcel records were queried for any Wisconsin site; no parcel IDs were captured.
- Caledonia's homepage contained no data center material and no case file was located.
Selected records
- QTS Data Centers — Potential Data Center Development (project page and timeline) · Village of DeForest
- Village of Caledonia website · Village of Caledonia
tax abatement development agreements — Partly checked
- No TID project plan, development agreement or PILOT document was read for Beaver Dam, Port Washington, Mount Pleasant, Kenosha or the Town of Beloit.
- Wisconsin Watch articles on community nondisclosure agreements and the Port Washington TIF referendum could not be retrieved during review, so the four communities that signed secrecy deals were not identified.
- Searches for the Port Washington TID and development agreement could not be run in the current review.
Selected records
- Data Center Information fact sheet (DocumentCenter View 2458) · City of Beaver Dam
operator disclosures — Partly checked
- The EdgeConneX Madison page could not be retrieved during review.
- Amazon Web Services, Google, Oracle and Apple location pages were not checked for Wisconsin sites.
- Colocation operators absent from Compute Atlas were not enumerated.
Selected records
- Hello, Beaver Dam! · Meta
- OpenAI, Oracle and Vantage Data Centers Announce Stargate Data Center Site in Wisconsin · Vantage Data Centers
- Microsoft completes construction on first datacenter facility in Mount Pleasant, Wisconsin · Microsoft
open datasets directories — Checked
- Directory listings cited by Compute Atlas (Baxtel, datacenterHawk, datacentermap) were not yet reviewed directly.
- No other licensed dataset was consulted for Wisconsin.
Selected records
- Compute Atlas facilities dataset — Wisconsin extract · Compute Atlas
historical closures withdrawals names — Partly checked
- No municipal withdrawal letter, denial or rescission record was read for any of these projects.
- WTMJ's year-end review (unavailable during review) and three DataCenterDynamics articles (unavailable during review) were not read.
- Wisconsin Watch follow-ups on Cassville and Cloverleaf Carlton could not be retrieved during review.
Selected records
- Microsoft scraps plans for Caledonia data center site, working to find an alternate location · Wisconsin Public Radio
- Microsoft pulls plug on plans for 244-acre data center in Caledonia after community pushback · TMJ4
- Menomonie mayor puts $1.6B data center proposal on hold · Wisconsin Public Radio
news and other discovery — Partly checked
- No general news sweep was possible after the current review did not include a broad discovery sweep; discovery after that point followed Compute Atlas source URLs and links inside retrieved pages only.
Selected records
- Microsoft Plans Kenosha, Wisconsin, Data Center Operations · Area Development
- Another billion-dollar Wisconsin data center is eyed for Cassville in Grant County · PBS Wisconsin (Wisconsin Watch)