# Wisconsin Data Centers: Map, Locations, Operators, Rules Source: https://savrn.com/data-center-map/wisconsin Markdown alternate of the page above; the site index is https://savrn.com/llms.txt --- Data centers identified 37 37 plotted Target for WI 53 39 counted against it (37 identified plus 2 in the pipeline), 73.6% Grid operator MISO whole state Moratorium Failed 1 state measure · 9 local pauses Delayed projects 5 1,000 MW disclosed Capital sites 4 $22B announced · 7 at risk The map ## Where Wisconsin's data centers stand Facilities 37Delayed projects 5Capital sites 4Blocked or halted 7Local restrictions 42 ### Key facts Data centers identified 37 from the operators' own facility lists, PeeringDB, OpenStreetMap and Wikidata, of which 3 are mapped buildings that carry no name Target count 53 facilities in the industry reference count for Wisconsin; this map holds 39 of them (73.6 percent), 14 still to identify Largest cluster Milwaukee County with 11 facilities Largest operator Ethoplex with 3 facilities Grid operator MISO State measures 1 on record, strongest status failed Local pauses 9 city or county moratoria · 33 local restrictions on the delay watchlist Water measures 1 state and local, plus the federal measures that apply everywhere Wisconsin ## Wisconsin data centers, in short Wisconsin has 37 data centers identified from primary sources, spread across 17 cities and counties and run by 28 operators. The largest concentration is Madison, with 8 data centers, followed by Milwaukee with 8 and Mount Pleasant with 3. The operators with the most data centers in Wisconsin are Ethoplex (3), Involta (2), ark data centers (2), Lumen (2), OneNeck IT Solutions (1). Colocation and interconnection providers appear most often because they publish building-level detail; hyperscale campuses appear where the operator or the county names the individual buildings. Not every operator discloses size. In Wisconsin, 10 publish a floor area and 7 publish a power figure, and each figure is shown against the data center it belongs to rather than added into one number. They are not the same measurement: one operator states the floor area of a single building, another the full capacity of a campus it has only announced. MISO runs the wholesale power market and the high-voltage grid for all of Wisconsin. 1 statewide measure governing data centers is on record, alongside 9 local pauses. 5 named projects in Wisconsin are delayed, blocked or under challenge, and the capital atlas records 4 sites here carrying $22B in announced commitments. The list ## Wisconsin data centers by city Every data center identified in Wisconsin, grouped by the city or county it stands in, 37 of them across 17 places. Each entry names the operator and links to the source that states it. ### Data centers in Madison, Wisconsin Madison, Wisconsin has 8 data centers on this map, run by 5Nines Data / Network222, EdgeConneX, Fiore Companies and Hoyos Consulting. 2 publish a floor area and 2 publish a power figure, shown against each one below. 1. 5Nines Data 5Nines Data / Network222 222 West Washington Avenue, Suite 170 6 networks 2. EdgeConneX Madison (EDCMAD01) EdgeConneX 4916 E Broadway, Pod #1 7,800 sq ft0.7 MW4 networks 3. Network 222 Fiore Companies 222 W Washington Ave. Ste. 1 3,500 sq ft0.15 MW13 networks 4. 612 W Main Hoyos Consulting 612 W Main St. 2 networks 5. Lumen Network Colocation market: Madison, WI Lumen 6. SupraNet Communications Madison SupraNet Communications 8000 Excelsior Drive 2 networks 7. University of Wisconsin-Madison University of Wisconsin-Madison 1210 W. Dayton Street 5 networks 8. Data center building 2802 Sylvan Avenue ### Data centers in Milwaukee, Wisconsin Milwaukee, Wisconsin has 8 data centers on this map, run by Cogent, fifteenfortyseven Critical Systems Realty, Lumen and Stack41. 2 publish a floor area and 2 publish a power figure, shown against each one below. 1. Milwaukee 2 Data Center Cogent 2915 South 5th Court 5,831 sq ft 2. MIWI1 fifteenfortyseven Critical Systems Realty 1 MW 3. Lumen Network Colocation market: Milwaukee, WI Lumen 4. Data Holdings Milwaukee Stack41 3135 W Highland Blvd 2 networks 5. TSR Solutions Data Center TSR Solutions 324 E Wisconsin Ave #825, Milwaukee, WI 53202 5 networks 6. Vaultas Vaultas 1101 N Market Street 7. MLUKWI Verizon Wireless 1234 Broadway, Milwaukee, WI 8. 324 E Wisconsin Wells Interconnection 324 E Wisconsin Ave 160,000 sq ft1 MW7 networks ### Data centers in Mount Pleasant, Wisconsin Mount Pleasant, Wisconsin has 3 data centers on this map, run by Microsoft. 1. Racine County datacenter campus (Mount Pleasant) Microsoft 2. Data center building 3. Data center building ### Data centers in Franklin, Wisconsin Franklin, Wisconsin has 2 data centers on this map, run by Expedient and Wisconsin CyberLynk Network. 1 publishes a floor area and 1 publishes a power figure, shown against each one below. 1. Expedient Milwaukee Expedient 4777 W Ironwood 27,000 sq ft1.6 MW 2. CyberLynk MKE1 Wisconsin CyberLynk Network 10125 S 52nd St 1 networks ### Data centers in Green Bay, Wisconsin Green Bay, Wisconsin has 2 data centers on this map, run by ark data centers and Involta. 2 publish a floor area, shown against each one below. 1. ark data centers - Green Bay ark data centers 7,192 sq ft 2. Green Bay Data Center Involta 7,192 sq ft ### Data centers in Harrison, Wisconsin Harrison, Wisconsin has 2 data centers on this map, run by ark data centers and Involta. 1. ark data centers data center ark data centers W6149 Old Highway Road Mailing address: Menasha 1 networks 2. Involta data center Involta ### Data centers in Port Washington, Wisconsin Port Washington, Wisconsin has 2 data centers on this map, run by Oracle and Vantage. 1 publishes a floor area and 1 publishes a power figure, shown against each one below. 1. Port Washington, Wisconsin Data Center Oracle 2. Port Washington (Lighthouse, WI1) Vantage 2,500,000 sq ft902 MW ### Data centers in Beaver Dam, Wisconsin Beaver Dam, Wisconsin has 1 data center on this map, run by Meta. 1. Beaver Dam Data Center Meta ### Data centers in Fitchburg, Wisconsin Fitchburg, Wisconsin has 1 data center on this map, run by OneNeck IT Solutions. 1 publishes a floor area and 1 publishes a power figure, shown against each one below. 1. US Signal WI02 - Madison OneNeck IT Solutions 5515 Nobel Drive 60,000 sq ft6 MW3 networks ### Data centers in Germantown, Wisconsin Germantown, Wisconsin has 1 data center on this map, run by Ethoplex. 1. Ethoplex Data Center Ethoplex N115W19150 Edison Dr 1 networks ### Data centers in Marshfield, Wisconsin Marshfield, Wisconsin has 1 data center on this map, run by Marshfield Clinic. 1. 901 Commerce Dr Marshfield Clinic 901 Commerce Dr, Marshfield, WI 54449 ### Data centers in Menomonie, Wisconsin Menomonie, Wisconsin has 1 data center on this map, run by West Wisconsin Telcom. 1. West Wisconsin Telcom data center West Wisconsin Telcom 816 6th Avenue ### Data centers in Oxford, Wisconsin Oxford, Wisconsin has 1 data center on this map. 1. Marquette-Adams Telephone Coop ### Data centers in Pewaukee, Wisconsin Pewaukee, Wisconsin has 1 data center on this map, run by WE Energies. 1. Pewaukee Data Center WE Energies W237N1500 Busse Road Mailing address: Waukesha ### Data centers in West Milwaukee, Wisconsin West Milwaukee, Wisconsin has 1 data center on this map, run by TierPoint. 1 publishes a floor area, shown against each one below. 1. TierPoint Milwaukee TierPoint 3701 W. Burnham Street, Ste C Mailing address: Milwaukee 28,000 sq ft1 networks ### Data centers in Unincorporated Brown County, Wisconsin Unincorporated Brown County, Wisconsin has 1 data center on this map, run by Ethoplex. 1. Ethoplex Edge DC - Green Bay Ethoplex 4151 Heritage Rd Mailing address: De Pere 1 networks ### Data centers in Unincorporated Fond du Lac County, Wisconsin Unincorporated Fond du Lac County, Wisconsin has 1 data center on this map, run by Ethoplex. 1. Ethoplex Edge DC - Fond du Lac Ethoplex W6720 Subway Rd Mailing address: Friendship No data center matches that filter. Floor area and power appear only where the operator or a government record publishes them. A building the sources describe without naming it is listed as a data center building at its county. Counties and operators ## Where they cluster, and who runs them ### Facilities by county 13 - Milwaukee County11 - Dane County9 - Brown County3 - Racine County3 - Calumet County2 - Ozaukee County2 - Dodge County1 - Dunn County1 - Fond du Lac County1 - Marquette County1 - Washington County1 - Waukesha County1 - Wood County1 ### Operators 28 - Ethoplex3 - Involta2 - ark data centers2 - Lumen2 - OneNeck IT Solutions1 - 5Nines Data / Network2221 - Hoyos Consulting1 - EdgeConneX1 - Fiore Companies1 - SupraNet Communications1 - University of Wisconsin-Madison1 - Meta1 - West Wisconsin Telcom1 - Wisconsin CyberLynk Network1 - Expedient1 ### Cities 15 - Madison8 - Milwaukee8 - Mount Pleasant3 - Green Bay2 - Harrison2 - Franklin2 - Port Washington2 - Fitchburg1 - Beaver Dam1 - Menomonie1 - Oxford1 - West Milwaukee1 - Germantown1 - Pewaukee1 - Marshfield1 What applies here ## The rules and the pipeline in Wisconsin Wisconsin has 1 state measure on record (failed), 9 local pauses, and 1 state or local water measure. MISO runs the grid there. Each tracker below holds the full record for Wisconsin, with every entry sourced. [Wisconsin Data Center Moratorium Tracker1 state measure · 9 local pauses](https://savrn.com/data-center-moratorium-tracker/wisconsin) [Data Center Water Tracker1 measure in Wisconsin, plus the federal layer](https://savrn.com/data-center-water-tracker) [Grid Operator WatchlistMISO](https://savrn.com/data-center-grid-operator-watchlist) [Nationwide Data Center Delay Watchlist5 projects delayed or blocked · 33 local restrictions](https://savrn.com/data-center-delay-tracker) [Data Center Capital Atlas4 sites · $22B announced · 7 at risk](https://savrn.com/data-center-capital-atlas) [US Data Center MapAll 4,767 counted, state by state](https://savrn.com/data-center-map) Nearby states ## Wisconsin's neighbors [Illinois212 placed · 55 records](https://savrn.com/data-center-map/illinois)[Minnesota120 placed · 33 records](https://savrn.com/data-center-map/minnesota)[Iowa85 placed · 44 records](https://savrn.com/data-center-map/iowa)[Michigan59 placed · 123 records](https://savrn.com/data-center-map/michigan)[All statesthe national map](https://savrn.com/data-center-map) Questions ## Wisconsin data centers, answered from the record How many data centers are in Wisconsin? The industry reference count for Wisconsin is 53 facilities. This map places 37 of them from primary sources, each with a source record you can open, and every entry names the operator, the county, and the grid operator that serves it. The rest are mostly small regional colocation providers and enterprise buildings that no public register describes. Where are Wisconsin's data centers? They are listed on this page city by city. By city: Madison (8), Milwaukee (8), Mount Pleasant (3), Green Bay (2). By county: Milwaukee County (11), Dane County (9), Brown County (3). Every data center identified in Wisconsin appears under the city or county it stands in, with its operator and the source that names it. Who operates data centers in Wisconsin? 28 operators appear in the registers for Wisconsin. The largest by facility count: Ethoplex (3), Involta (2), ark data centers (2), Lumen (2), OneNeck IT Solutions (1). Interconnection-heavy providers are over-represented because PeeringDB records where networks meet; hyperscalers appear where contributors have mapped their buildings. Does Wisconsin have a data center moratorium? Wisconsin has 1 state measure on record: AB 1099 / SB 1061: Moratorium on operation of data centers (failed, Mar 2026). 9 city or county pauses are on record locally. The Wisconsin Data Center Moratorium Tracker carries each measure with its primary source and a weekly changelog. Which grid operator serves Wisconsin data centers? MISO runs the wholesale power market and the high-voltage transmission system for all of Wisconsin. Effectively the entire state is MISO (ATC transmission in east/central; Xcel NSP-W in west), not a genuine multi-RTO state. Are new data centers being built or delayed in Wisconsin? 5 named projects in Wisconsin are delayed, blocked, or under challenge (1,000 MW disclosed), with 33 local restrictions, 2 jurisdictional actions, 9 utility dockets, and 0 flagged queue row or large-load studys. The capital atlas records 4 named sites in Wisconsin with $22B in announced commitments and 7 projects blocked, delayed, or halted ($47.6B disclosed). Facility layer: PeeringDB (Acceptable Use Policy), OpenStreetMap (ODbL, © OpenStreetMap contributors), Wikidata (CC0), US Census Bureau boundaries. Tracker layers: the SAVRN Moratorium Tracker, Water Tracker, Grid Operator Watchlist, Delay Watchlist, and Capital Atlas, each primary-sourced. Method on the [national map](https://savrn.com/data-center-map#method). The reference set ## Wisconsin across the SAVRN trackers The same state followed through the money, the policy, the water and the delays. Each page is primary-sourced and refreshed on its own schedule, and each links back here. [Open the Wisconsin power pagePlanned and operating power plants, the grid operator, utilities and prices, jobs since 2019 and every county in Wisconsin](https://savrn.com/power-supply-chain-map/wisconsin) [Wisconsin Data Center Investment TrackerCapital Atlas: named sites, capital providers, financing, and the blocked or delayed record in Wisconsin](https://savrn.com/data-center-capital-atlas/wisconsin) [Wisconsin Data Center Moratorium TrackerEvery state measure and local moratorium on record in Wisconsin, each one cited](https://savrn.com/data-center-moratorium-tracker/wisconsin) [Data Center Water TrackerWater measures that touch a data center, with the fifty-state water ledger](https://savrn.com/data-center-water-tracker) [Data Center Delay WatchlistNamed projects delayed, blocked or under challenge, with the dockets behind them](https://savrn.com/data-center-delay-tracker) ### Sources