Ohio
Data centers in Butler County, Ohio
The Census tracks 2 data center projects in Butler County, Ohio, with 250 MW of published capacity: 1 proposed, 1 under construction. 1 moratorium action recorded.
How many data centers are in Butler County?
The Census tracks 2 major projects here as of Sep 24, 2026: 1 proposed, 1 under construction. They are in Trenton. The largest by published capacity is Project Mila (250 MW).
Projects
| Project | Status | Capacity | Developer |
|---|---|---|---|
| Project Mila Trenton, Butler County, OH | Under construction | 250 MW | Prologis |
| Amazon Web Services data center campus, Madison and St. Clair townships Butler County, OH | Proposed | — | Amazon Web Services |
Moratoriums
| Jurisdiction | Action | Length | What the source says |
|---|---|---|---|
| Butler County Ohio · county |
Adopted Jun 2026 |
six months | Six-month moratorium on data centers. WVXUSource excerpt“voted unanimously Tuesday to approve a six-month moratorium on data centers.” |
Recent changes
| Date | What changed | Project |
|---|---|---|
| Sep 2026 | Trenton's city attorney notifies Butler County that the city is withdrawing the annexation petition, effective immediately WVXU | Amazon Web Services data center campus, Madison and St. Clair townships |
| Sep 2026 | The withdrawal comes one day before a scheduled Butler County Board of Commissioners public hearing on the annexation WCPO | Amazon Web Services data center campus, Madison and St. Clair townships |
| Sep 2026 | Butler County commissioners accept the withdrawal WCPO | Amazon Web Services data center campus, Madison and St. Clair townships |
| Aug 2026 | Madison Township trustees vote unanimously to reject Trenton's annexation petition WYSO (WVXU story) | Amazon Web Services data center campus, Madison and St. Clair townships |
| Aug 2026 | St. Clair Township also rejects the annexation WYSO (WVXU story) | Amazon Web Services data center campus, Madison and St. Clair townships |
| Jul 2026 | Trenton City Council tables a vote on annexing 600 acres from St. Clair and Madison townships WVXU | Amazon Web Services data center campus, Madison and St. Clair townships |
| Jul 2026 | Residents submit a petition to amend Trenton's charter to prohibit construction of data centers over 25 megawatts WVXU | Project Mila |
| Jul 2026 | Trenton City Council approves a 15-year, 75% property tax abatement agreement and a compensation agreement with Prologis WVXU | Project Mila |
| Jun 2026 | Butler County enacts a six-month data center moratorium covering Madison and five other townships WVXU | Amazon Web Services data center campus, Madison and St. Clair townships |
| May 2026 | St. Clair Township enacts a 12-month moratorium on data centers WVXU | Amazon Web Services data center campus, Madison and St. Clair townships |
| Mar 2026 | Trenton City Planning Commission unanimously approves Prologis' site plan WVXU | Project Mila |
| Dec 2025 | A nearby resident says heavy machinery began breaking ground on the site just before Christmas WCPO | Project Mila |
Butler County data centers: common questions
How many data centers are in Butler County, Ohio?
The Census tracks 2 major data center projects in Butler County as of Sep 24, 2026: 1 proposed, 1 under construction. That covers major sourced projects, not every smaller colocation or enterprise facility.
What is the biggest data center project in Butler County?
By published planned capacity, Project Mila in Trenton, at 250 MW. Its status is under construction.
Is there a data center moratorium in Butler County?
Butler County adopted a data center moratorium (Jun 2026), six months. Details and sources are in the moratorium tracker.
This page collects the county-level record: every tracked project, moratorium and local rule we can source for Butler County. See all Ohio projects or look up projects near your ZIP code.
Cite this page
Last updated Sep 24, 2026. Figures may change as records are updated — include the date you retrieved them.
| APA | Data Center Census. (2026). Data centers in Butler County, Ohio. Retrieved from https://datacentercensus.com/us/ohio/butler-county |
|---|---|
| MLA | “Data centers in Butler County, Ohio.” Data Center Census, Sep 24, 2026, https://datacentercensus.com/us/ohio/butler-county. |
| Link | https://datacentercensus.com/us/ohio/butler-county |
Republishing a figure or table? Attribute it to Data Center Census with a link to this page. The underlying data is downloadable as JSON and CSV; the press kit has standing figures and contact details.