Microsoft PHX-81
Operated by Microsoft · El Mirage
- Capacity
- 57 MW
- Floor area
- 245,000 sq ft
- Online since
- 2025
Capacity: Estimate from a data center listing site. Cleanview project map, read October 7, 2026. The listing does not say what the figure measures.
Rest of Microsoft El Mirage campus
- Microsoft El Mirage CampusOperating
- Microsoft PHX-80Operating · 57 MW
- Microsoft PHX-82Operating · 57 MW
- Microsoft PHX-83Proposed · 57 MW
Other Microsoft sites in Arizona
- Microsoft Goodyear Campus (PHX-10 to PHX-14)Operating
- Microsoft PHX-10Operating · 57 MW
- Microsoft PHX-11Operating · 57 MW
- Microsoft PHX-12Operating · 57 MW
- Microsoft PHX-13Operating · 57 MW
- Microsoft PHX-14Operating · 57 MW
- Microsoft PHX-15Proposed · 57 MW
- Microsoft PHX-16Proposed · 57 MW
- Microsoft PHX-70Operating · 57 MW
- Microsoft PHX-71Operating · 57 MW
- Microsoft PHX-72Operating · 57 MW
- Microsoft PHX-73Proposed · 57 MW
- Microsoft PHX-74Proposed · 57 MW
More Arizona data centers
How we know this
Compiled from public records and checked on 2026-10-07. Our confidence in this record is medium. Blank figures above mean the number is not publicly established, not that it is zero.
Each statement on this page is listed with the page it came from and the words that say it. Sources open in a new tab.
Status: Operating
Note: Only listing sites call this building running, and an October 2024 city filing said under construction.
- [1] Baxtel, Microsoft: PHX81 Data Center (opens in a new tab) · read October 7, 2026
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El Mirage, AZ 85335, USA Operational Fully operational facility
- [2] Cleanview, Data Centers in Arizona - Project List & Locations (opens in a new tab) · read October 7, 2026
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Map record 3533: Microsoft PHX-81 | status Operating
- [1] Baxtel, Microsoft: PHX81 Data Center (opens in a new tab) · read October 7, 2026
Capacity: 57 MW
Note: Only a listing site gives this figure.
- [2] Cleanview, Data Centers in Arizona - Project List & Locations (opens in a new tab) · read October 7, 2026
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Map record 3533: Microsoft PHX-81 | status Operating | capacityMw 57
- [2] Cleanview, Data Centers in Arizona - Project List & Locations (opens in a new tab) · read October 7, 2026
Floor area: 245,000 sq ft
Note: The city filing gives this as an approximate size.
- [3] City of El Mirage, Site Plan Amendment PHX82 Project Narrative (El Mirage City Council packet, April 16, 2024) (opens in a new tab) · April 16, 2024
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Like PHX80 and PHX81, PHX82 is an approximately 245,000-square-foot single-story data center.
- [3] City of El Mirage, Site Plan Amendment PHX82 Project Narrative (El Mirage City Council packet, April 16, 2024) (opens in a new tab) · April 16, 2024
Online since: 2025
Note: A listing site gives 2025 as the year built.
- [1] Baxtel, Microsoft: PHX81 Data Center (opens in a new tab) · read October 7, 2026
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Year Built: 2025
- [1] Baxtel, Microsoft: PHX81 Data Center (opens in a new tab) · read October 7, 2026
Location: El Mirage
- [4] City of El Mirage, Development Application SPA24-09-01 MS PHX83 (El Mirage City Council packet, December 3, 2024) (opens in a new tab) · December 3, 2024
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The second and third data centers on the campus (PHX81 and PHX82) are permitted and are under construction.
at the southeast corner of West Olive Avenue and North Dysart Road in the City of El Mirage, Arizona.
- [1] Baxtel, Microsoft: PHX81 Data Center (opens in a new tab) · read October 7, 2026
Show quote
El Mirage, AZ 85335, USA Operational Fully operational facility
- [4] City of El Mirage, Development Application SPA24-09-01 MS PHX83 (El Mirage City Council packet, December 3, 2024) (opens in a new tab) · December 3, 2024
Permitted and under construction on the El Mirage campus in October 2024.
- [4] City of El Mirage, Development Application SPA24-09-01 MS PHX83 (El Mirage City Council packet, December 3, 2024) (opens in a new tab) · December 3, 2024
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The second and third data centers on the campus (PHX81 and PHX82) are permitted and are under construction.
site owned by the Microsoft Corporation at the southeast corner of West Olive Avenue and North Dysart Road in the City of El Mirage, Arizona.
- [4] City of El Mirage, Development Application SPA24-09-01 MS PHX83 (El Mirage City Council packet, December 3, 2024) (opens in a new tab) · December 3, 2024
Counted as operating under Arizona AI's rule for buildings whose operator has not announced an in-service date: Microsoft says it operates data centers in El Mirage, listing sites list this building as running, and no newer source we found says otherwise.
- [5] Microsoft, Microsoft datacenters in Arizona (opens in a new tab) · October 1, 2025
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Microsoft operates datacenters and is building new facilities in El Mirage and Goodyear, part of the greater Phoenix area.
- [1] Baxtel, Microsoft: PHX81 Data Center (opens in a new tab) · read October 7, 2026
Show quote
El Mirage, AZ 85335, USA Operational Fully operational facility
- [2] Cleanview, Data Centers in Arizona - Project List & Locations (opens in a new tab) · read October 7, 2026
Show quote
Map record 3533: Microsoft PHX-81 | status Operating
- [5] Microsoft, Microsoft datacenters in Arizona (opens in a new tab) · October 1, 2025
Operator site: https://datacenters.microsoft.com/
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