Data Center Census

Wisconsin

Data centers in Wisconsin

The Census tracks 2 major data center projects in Wisconsin, with 1.3 GW of planned capacity: 1 under construction, 1 operating.

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Wisconsin data center projects

ProjectStatusCapacityDeveloperLast update
Port Washington (Lighthouse) Data Center Campus
Port Washington, Ozaukee County
 Under construction 1.3 GW Vantage Data Centers Sep 14, 2026
Microsoft Fairwater
Mount Pleasant, Racine County
 Operating — Microsoft Jul 16, 2026

Recent changes in Wisconsin

  1. Port Washington (Lighthouse) Data Center Campus WI
    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 Wisconsin Watch
  2. Port Washington (Lighthouse) Data Center Campus WI
    PSC requires ATC to restart its application for the $1.3B+ transmission line and five substations serving the campus Wisconsin Watch
  3. Microsoft Fairwater WI
    Microsoft signs 15-year electric service contract with We Energies Wisconsin Watch
  4. Microsoft Fairwater WI
    Three Sturtevant residents sue Microsoft in federal court over noise WPR
  5. Port Washington (Lighthouse) Data Center Campus WI
    Oracle credit rating falls to BBB-; PSC rejects We Energies request to reconsider collateral rules; Oracle challenges rules in Ozaukee County Circuit Court Milwaukee Neighborhood News Service
  6. Microsoft Fairwater WI
    Microsoft announces construction of first facility is complete Microsoft Source
  7. Port Washington (Lighthouse) Data Center Campus WI
    Oracle files petition in Ozaukee County Circuit Court seeking review of the PSC's data center tariff decision Ozaukee County Circuit Court (via WPR)
  8. Port Washington (Lighthouse) Data Center Campus WI
    DNR issues air construction and operation permits for 45 diesel emergency generators Wisconsin Department of Natural Resources
  9. Port Washington (Lighthouse) Data Center Campus WI
    DNR public hearing on air permit (comment period Mar. 3-Apr. 14) Wisconsin Department of Natural Resources
  10. Port Washington (Lighthouse) Data Center Campus WI
    Port Washington voters approve a referendum requiring voter approval of future large TIDs; it does not affect the TID already approved for the data center WUWM

How many data centers are in Wisconsin?

This page counts the major projects the Census has researched and sourced: 2 as of Sep 22, 2026. It does not yet include every smaller colocation or enterprise facility, so the total number of buildings in Wisconsin is higher. We add projects as they are announced or found in public filings.

Counties with tracked projects

Ozaukee County · Racine County

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