By state
Data centers in Maryland
10 data centers and projects on our map in Maryland, including 3 projects we track in detail. Each one links to its source. Below: where they are by county, the projects in the news, and the latest reporting from both sides.
Latest news from Maryland
Cited by both sides legal October 12, 2026
Quantum Maryland filed suit against Frederick County on October 12, alleging the county executive paused new data center applications for political reasons tied to the election. County Executive Jessica Fitzwater denied the claim and called the suit intimidation; a separate 110 million dollar community benefits agreement for the Frederick Digital Campus remains in place.
Check it: Watch for the complaint itself and the county's answer, since a lawsuit allegation is not a finding and the moratorium's legal status will turn on the court record.
Cited by both sides legal October 10, 2026
Quantum Maryland LLC, managed by Catellus Maryland, filed a 67 page complaint in Frederick County Circuit Court asking the court to overturn the county's moratorium on new data center applications through July 2027 and to allow its applications to proceed. The suit names County Executive Jessica Fitzwater and the planning commission and alleges the pause was driven by election politics and derailed a $500 million land transaction. Fitzwater posted on Facebook that she will fight the lawsuit and called the developer's claims false.
Check it: This is one side of a civil complaint; the county has not yet responded in court and the moratorium remains in effect for now.
Supports the case against report October 8, 2026
A new UMBC statewide survey released October 8 found 78 percent of Maryland likely voters oppose new data centers in the state while 13 percent support them. Respondents cited electricity costs, water quality and nearby quality of life as top concerns. The result mirrors national Pew and Gallup findings from earlier in 2026.
Check it: A single state poll is a snapshot; see methodology for sample size, mode and weighting before extrapolating.
Supports the case against local October 5, 2026
The Anne Arundel County Council passed Bill 63-26, a 15 month pause on new data center development that runs until January 31, 2028 or until the county adopts permanent rules. Projects already in development are exempt. An amendment to carve out national defense projects failed, over objections from backers of nearby Fort George G. Meade.
Check it: The exemption language matters. Confirm which projects are considered already in development before assuming any specific site is covered or blocked.
Supports the case for company September 30, 2026
Constellation and Amazon announced a 20 year PPA under which Amazon will purchase 690 MW from the Calvert Cliffs nuclear plant and Constellation will invest about $3 billion in Maryland, including roughly 190 MW of new emission free capacity coming online between 2030 and 2032 through uprates and license renewal. A related retail supply deal covers Amazon operations in the 13 state PJM region. Governor Wes Moore endorsed the deal.
Check it: Of the 690 MW, roughly 190 MW is new capacity added through uprates by 2032; the remainder is existing output redirected under the long term contract.
Cited by both sides news September 29, 2026
Real estate professionals told the Daily Record they still expect data center growth in Maryland after Gov. Wes Moore's September executive order, which sets uniform review standards, creates a task force and adds a tracking dashboard. More than half of Maryland's counties already have some form of data center moratorium.
Check it: Moore's order is a framework, not new statute; specifics of environmental and ratepayer requirements will be set by task force recommendations.
Supports the case against policy September 23, 2026
Governor Wes Moore signed an executive order creating a single Maryland review process for any data center 25 megawatts or larger that seeks a state permit, incentive, or letter of support, judged against ratepayer protection, economic benefit, community engagement, environmental safeguards, and transparency. The governor also said he will work with the General Assembly next session to repeal Maryland's 2020 Data Center Sales and Use Tax Exemption. Industry groups have argued the state incentive is needed to compete with Virginia, while the Moore administration argues the giveaway is not justified.
Check it: The executive order takes effect immediately, but repeal of the tax exemption requires the General Assembly to pass legislation in the 2027 session.
Supports the case against local September 22, 2026
The Baltimore County Council voted unanimously to extend its data center moratorium from the end of 2026 through at least December 2027. Council members said the industry has not answered questions about environmental and energy impacts while the county studies whether to restrict data centers to specific areas. Industry representatives have argued the county is delaying investment that could support tax revenue.
Check it: Whether county studies produce specific zoning rules before the new deadline and whether the vote is final.
Supports the case against local September 21, 2026
The county council was scheduled to vote September 21 to extend the existing data center moratorium, currently expiring January 1, through December 2027. Councilman David Marks said the extension gives the public more time to weigh in on land use, tax and water concerns. The Planning Board approved its own data center report with 20 amendments on September 17.
Check it: Verify the final vote result and whether the extended moratorium contains carve-outs for pending applications.