AWS Marysville Data Center Campus (Project Cosmo)
Marysville, Union County, OH
Under constructionPartially sourcedStatus confidence: lowhyperscale
AWS won approval in March 2025 for a two-building, 500,000 sq ft campus on 55 acres at 14684 Industrial Parkway in Marysville Innovation Park. Construction began August 2025 with completion targeted for 2027; the project is known internally as Project Cosmo.
Announced capacity
Unknown
Operational capacity
Unknown
First power
Unknown
Owner
Not publicly disclosed
What we know
- Status: Under construction
- Developed by Amazon Web Services
- Announced investment: $1,000,000,000
What remains unknown
- No announced campus capacity on record
- No utility-approved grid capacity on record
- No interconnection queue position identified
- No behind-the-meter generation identified
- No operational capacity on record
- Tenant not publicly disclosed
- Gas supply not confirmed
Overview
The essential facts on record for this project and how confident we are in them.
Codename
Unknown
Alternate names
Unknown
Type
hyperscale
County
Union County
State / province
OH
City
Marysville
Market
Unknown
ISO / RTO
Unknown
Utility
Unknown
Power profile
Images & site
Site imagery and location context.
No imagery on record yet.
Coordinates
40.2364, -83.3672(approximate — county-level)
Gross acres
Unknown
Net developable acres
Unknown
Contiguous usable acres
Unknown
Companies & participants
1 on recordEvery organization and person with a known role in this project, with the evidence behind each relationship.
| Role | Party | Assertion | Confidence | Start | End |
|---|---|---|---|---|---|
| developer | Amazon Web Services | reported | low | Unknown | current |
Capacity & phases
How big this project is, by each distinct measure. These figures measure different things and are never added together.
All current records
No current capacity records.
Grid power
0 grid connectionsThe project's path to utility power: interconnection requests, approvals, and delivery infrastructure.
No grid connection records for this project.
Behind-the-meter generation
0 unit groupsPower generated on site without going through the utility grid.
Grid and behind-the-meter supply are modeled separately.
No behind-the-meter generation records for this project.
Natural gas
0 supply recordsGas supply arrangements feeding on-site generation.
No gas supply records for this project.
Water & cooling
0 source recordsWhere the project's water comes from and how the facilities are cooled.
No water supply records for this project.
Cooling technology (facilities)
No campus is linked to this project; no facility cooling data.
Fiber & connectivity
0 routesNetwork connectivity: routes, carriers, and diversity.
No fiber route records for this project.
Land & expansion
The land under the project and how far the site could ultimately grow.
Gross, net developable, contiguous usable, and adjacent expansion acreage are distinct figures and are never conflated. Contiguous usable acreage is the binding figure for single-campus buildout.
Gross acres
Unknown
Net developable
Unknown
Contiguous usable
Unknown
Adjacent expansion
Unknown
No land profile recorded for this project.
Control type
Unknown
Zoning status
Unknown
Zoning designation
Unknown
Entitlements
Unknown
Construction & equipment
Who is building the project and the major equipment on order.
No construction or equipment intelligence on record yet.
Capital, financing & contracts
What the project costs, how it is financed, and the commercial agreements behind it.
Est. total cost
Not publicly disclosed
Infrastructure cost
Not publicly disclosed
Generation cost
Not publicly disclosed
Capex per MW
Not publicly disclosed
Financing structure
Unknown
Agreements
No agreements on record for this project.
Some commercial terms may be restricted at your access level.
Permits & incentives
Permits, zoning, tax arrangements, and public incentives.
Incentives
Unknown
Property tax
Unknown
Zoning status
Unknown
Zoning designation
Unknown
Entitlements
Unknown
Incentive agreements
No incentive agreements on record for this project.
Related policy
No policy items linked to this project.
Timeline
0 entriesEvery dated event on record, newest first. Superseded entries stay visible.
No milestones or status transitions recorded yet.
Recent changes
last 2What changed in this record recently, and why.
| Date | Field | Change | Cause |
|---|---|---|---|
| 2026-07-15 | announced investment usd | (empty)->1000000000 | claim accepted |
| 2026-07-15 | executive summary | (empty)->AWS won approval in March 2025 for a two-building, 500,00... | claim accepted |
Risks & open questions
13 transparent dimensions, no single unexplained scoreOur readiness assessment across thirteen dimensions, plus known risk notes and open questions.
| Dimension | Rating | Conf | Evidence summary | Open questions | Blocking issues | Last verified |
|---|---|---|---|---|---|---|
| Land control | Unknown | unknown | Unknown | Unknown | Unknown | Unknown |
| Contiguous land | Unknown | unknown | Unknown |
Sources & evidence
1 distinct sourceEvery source cited by the accepted facts in this dossier.
Sources cited on accepted claims for this project and its child records, scoped to your access level.
| Title | Publisher | Tier | Type | Published | Retrieved |
|---|---|---|---|---|---|
| AWS Marysville Data Center Campus (Project Cosmo) - datacenterdynamics.com | datacenterdynamics.com | T3 | news article | Unknown | 2026-07-13 |