Sue Data Centers

Data Center Registry

Mastercard St. Louis Tech Hub Data Center (O'Fallon)

O'Fallon, St. Charles County, Missouri

OperatingNo reception on recordRecord updated November 2, 2026

Mastercard St. Louis Tech Hub Data Center (O'Fallon) is an operating data center in O'Fallon, Missouri (St. Charles County), operated by Mastercard.

Every line on this page traces to a public source listed at the bottom. Where a figure was looked for and not found, the row says so. A blank is never a zero.

Facility record

Operating

Operator
Mastercard
Facility type
Data center
Location
O'Fallon, St. Charles County, MO
Coordinates
38.8100, -90.7000 (approximate)
Power capacity
Not established from a public source
Land
Not established from a public source
Investment
Not established from a public source
Announced
Not established from a public source
Utility
Not established from a public source
Cooling
Not established from a public source
Water use
Not established from a public source
Jobs
Not established from a public source
Public subsidy
Not established from a public source
Community reception
No reception on record
Source confidence
Confirmed by multiple independent sources or official documentation

Opposition and litigation at this site

Nothing on record as of November 2, 2026. No lawsuit, organized opposition, or contested hearing over Mastercard St. Louis Tech Hub Data Center (O'Fallon) in O'Fallon, St. Charles County, Missouri appears in the sources this registry tracks. That is an absence in our sources rather than a finding that none exists, and local opposition often predates any coverage a national dataset would pick up.

If you live near this site and something is happening that this page does not show, that is worth telling us. Send us the document and it goes in the record with the source attached. For sites where opposition is already established, see every contested site we track.

A new status, a permit, a reception finding, or a lawsuit. Nothing else, ever.

Notes on the record

A 75,000 sq ft data center inside a 525,000 sq ft LEED Platinum campus. The campus also houses Mastercard's global operations center and has 4,000+ employees.

What the record does not establish, and the document that would

In every fight on our tracker the decisive fact came out of a public records request. These are the requests for this site.

  • Power capacity in megawatts
  • Cooling method and water use
  • Tax abatements or other public subsidy
  • Permanent jobs promised
  • Land area
  • How the community has received it
  • Which utility serves it
Which document closes each gap
Power capacity in megawatts
The utility's large load service agreement, the interconnection request in the grid operator's queue, or the electrical site plan in the permit file.
Cooling method and water use
The water service agreement, any groundwater appropriation permit, and the mechanical narrative in the site plan.
Tax abatements or other public subsidy
The abatement, PILOT, or development agreement approved by the county, city, or development authority, and the state's data center sales tax exemption certificate if one was issued.
Permanent jobs promised
The economic development application or incentive agreement, which usually states a job commitment and a clawback.
Land area
The rezoning application, the plat, or the deed recorded with the county.
How the community has received it
Planning commission and governing body minutes, public comment records, and any petition or lawsuit filed in the county.
Which utility serves it
The electric service agreement or the utility's filing with the state public utility commission.

Have one of these documents? Send it to us and we will add it to the record with attribution.

Other sites within 30 miles

Distances are between recorded coordinates, many of which are a city or county centroid, so treat them as approximate. Cumulative load on one utility and one aquifer is the question a planning commission rarely asks.

Tell us about your situation

Living near Mastercard St. Louis Tech Hub Data Center (O'Fallon)?

Tell us the basics. Where a participating attorney in your state is available, we may share your information with them with your consent. Free, no obligation, and no guarantee anyone will contact you.

Questions people ask about this site

Is there opposition to the Mastercard St. Louis Tech Hub Data Center (O'Fallon) in O'Fallon?

Nothing on record as of November 2, 2026. No lawsuit, organized opposition, or contested hearing over Mastercard St. Louis Tech Hub Data Center (O'Fallon) in O'Fallon, St. Charles County, Missouri appears in the sources this registry tracks. That is an absence in our sources rather than a finding that none exists, and local opposition often predates any coverage a national dataset would pick up.

Has anyone filed a lawsuit over the Mastercard St. Louis Tech Hub Data Center (O'Fallon)?

No lawsuit over Mastercard St. Louis Tech Hub Data Center (O'Fallon) appears in the record we track as of November 2, 2026. Residents most often reach a lawyer over water supply, well drawdown, noise from cooling plant, property value, or a rezoning approved without the notice the ordinance required. If any of that is happening near this site, it is worth a review whether or not a case has been filed yet.

How much water does Mastercard St. Louis Tech Hub Data Center (O'Fallon) use?

No water withdrawal figure for Mastercard St. Louis Tech Hub Data Center (O'Fallon) is on record here. Water use is rarely published voluntarily; it usually surfaces through a utility service agreement or a state withdrawal permit, both of which are public records. We leave the number blank rather than estimate one.

Who operates Mastercard St. Louis Tech Hub Data Center (O'Fallon), and how big is it?

Mastercard is the operator on record. No capacity figure is on record for this site.

How to cite this page

SueDataCenters.org Data Center Registry, "Mastercard St. Louis Tech Hub Data Center (O'Fallon)," updated November 2, 2026, https://suedatacenters.org/data-centers/mastercard-ofallon-technology-hub-data-center-mo.

Facility data from Compute Atlas (E. Kubiak), version 1.35.1 (November 2, 2026), licensed CC BY 4.0, record https://www.compute-atlas.com/facilities/mastercard-ofallon-technology-hub-data-center-mo, retrieved November 5, 2026.

Corrections with a public source are welcome at the Compute Atlas record or through our contact page. The whole registry is available as CSV and JSON under CC BY 4.0.

Sources for this record

As compiled and cited by Compute Atlas, with our own reporting appended. Archived links are used where the original has moved.

  1. 1.Mastercard St. Louis Tech Hub (O'Fallon) campus description · Mastercard · retrieved November 2, 2026
  2. 2.Mastercard Global Technology & Operations Headquarters project page · PARIC · retrieved November 2, 2026

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