Data Centers in Wisconsin
12 verified facilities · about 35 estimated ·
Wisconsin data centers at a glance
As of September 2026, Wisconsin has 12 data centers verified in OpenStreetMap and an estimated 35 in total. That ranks 31st among the 48 states and territories in the directory and is 0.7% of all verified US facilities. Facilities cluster in Milwaukee (2), Franklin (1), and Madison (1). The largest operators by mapped sites are Involta (1), Lumen Technologies (1), and WE Energies (1), out of 4 named operators. Malachi.Energy also tracks 3 mega projects in Wisconsin totaling 2.7 GW of planned capacity and about $23 billion in announced investment, led by Microsoft Wisconsin in Mount Pleasant, WI, 1.5 GW and about $7 billion, operational, targeted for 2026.
Facility counts: OpenStreetMap contributors (ODbL), scaled to Baxtel data center market directory totals. Mega projects: Malachi.Energy tally of public filings and announcements. Method notes on the methodology page. See also Wisconsin electricity rates.
Verified
12
OSM-mapped facilities
Estimated
~35
Scaled to industry totals
Top hub
Milwaukee
2 verified facilities
Mega projects
2.7 GW
3 tracked, $23B announced
Map of data centers in Wisconsin
County boundaries, every verified facility, and tracked mega projects sized by planned capacity. Downloads carry the source line and dataset date for citation.
Top operators in Wisconsin
By OSM-verified facility count
- 1.Involta1
- 2.Lumen Technologies1
- 3.WE Energies1
- 4.West Wisconsin Telcom1
Key hubs in Wisconsin
Cities with the most verified facilities
- 1.Milwaukee2
- 2.Franklin1
- 3.Madison1
- 4.Menomonie1
- 5.Waukesha1
Mega projects in Wisconsin
3 tracked projects · 2.7 GW planned capacity · $23.3B announced
Microsoft Wisconsin (Mount Pleasant, WI)
Microsoft
Microsoft's Fairwater AI campus on the former Foxconn site. The first $3.3B facility became fully operational in June 2026; a second $4B facility is under construction for 2028.
Target: 2026Source: Wisconsin Public Radio (Jun 2026)
Stargate Lighthouse (Port Washington, WI)
Vantage / Oracle / OpenAI
Stargate site in Wisconsin operated by Vantage for Oracle and OpenAI, scalable to 3.5 GW in later phases.
Target: 2028Source: Epoch AI (Apr 2026)
Meta Beaver Dam (Dodge County, WI)
Meta
Meta's Dodge County campus broke ground in November 2025. Wisconsin's PSC approved the Alliant Energy supply deal in May 2026 at a 220 MW peak load.
Target: 2027Source: Wisconsin Watch (May 2026)
All verified data centers in Wisconsin
12 facilities mapped in OpenStreetMap, sorted by city. Unnamed entries are mapped buildings tagged as data centers without a public name.
| Name | Operator | City | Address |
|---|---|---|---|
| Expedient Milwaukee | Unknown | Franklin | 4777 West Ironwood Drive |
| Unnamed facility | Unknown | Madison | 2802 Sylvan Avenue |
| Unnamed facility | West Wisconsin Telcom | Menomonie | 816 6th Avenue |
| Data Holdings Data Center | Unknown | Milwaukee | 3135 West Highland Boulevard |
| TierPoint Milwaukee | Unknown | Milwaukee | 3701A West Burnham Street |
| Pewaukee Data Center | WE Energies | Waukesha | W237N1500 Busse Road |
| Lumen Madison 1 Data Center | Lumen Technologies | Unknown | Not listed |
| Marquette-Adams Telephone Coop | Unknown | Unknown | Not listed |
| Unnamed facility | Involta | Unknown | Not listed |
| Unnamed facility | Unknown | Unknown | Not listed |
| Unnamed facility | Unknown | Unknown | Not listed |
| Unnamed facility | Unknown | Unknown | Not listed |
Frequently asked questions
How many data centers are in Wisconsin?
Wisconsin has 12 data centers verified in OpenStreetMap as of September 2026, and an estimated 35 in total once unmapped facilities are scaled in against Baxtel's industry count. That places it 31st of 48 states and territories by verified count.
Where are the data centers in Wisconsin?
The largest concentrations in Wisconsin are Milwaukee with 2 verified facilities, Franklin with 1 verified facility, Madison with 1 verified facility, Menomonie with 1 verified facility, and Waukesha with 1 verified facility. The full table below lists every verified facility in the state with its operator and address.
Who operates the most data centers in Wisconsin?
By number of OSM-verified facilities, the largest data center operators in Wisconsin are Involta (1), Lumen Technologies (1), WE Energies (1), and West Wisconsin Telcom (1). This ranks mapped sites, not megawatts, so a hyperscaler with many small buildings can outrank a colocation provider with one large campus.
What large data centers are being built in Wisconsin?
Malachi.Energy tracks 3 mega projects in Wisconsin as of September 2026: Microsoft Wisconsin in Mount Pleasant, WI, 1.5 GW and about $7 billion, operational, targeted for 2026; Stargate Lighthouse (Vantage / Oracle / OpenAI) in Port Washington, WI, 1.0 GW and about $15 billion, under construction, targeted for 2028; and Meta Beaver Dam in Dodge County, WI, 220 MW and about $1 billion, under construction, targeted for 2027. Together they total 2.7 GW of planned capacity and about $23 billion in announced investment. Figures are planned capacity from public filings and announcements, not delivered power.
Facility data sourced from OpenStreetMap contributors (ODbL). Estimated totals scaled to Baxtel industry counts. Mega project data from public filings and announcements. Dataset last updated . Built by Malachi.Energy.