Data Centers in Connecticut
Connecticut has 33 data centers identified from primary sources across 4 counties, run by 14 operators, against an industry reference count of 52. Fairfield County holds the largest cluster with 16. ISO-NE runs the grid for all of the state. 1 state measure on record (failed) and 1 local pause; 2 named projects delayed or blocked.
Where Connecticut's data centers stand
Key facts
- Data centers identified
- 33 from the operators' own facility lists, PeeringDB, OpenStreetMap and Wikidata, of which 1 are mapped buildings that carry no name
- Target count
- 52 facilities in the industry reference count for Connecticut; this map holds 34 of them (65.4 percent), 18 still to identify
- Largest cluster
- Fairfield County with 16 facilities
- Largest operator
- Lumen with 8 facilities
- Grid operator
- ISO-NE
- State measures
- 1 on record, strongest status failed
- Local pauses
- 1 city or county moratoria · 2 local restrictions on the delay watchlist
- Water measures
- 0 state and local, plus the federal measures that apply everywhere
Connecticut data centers, in short
Connecticut has 33 data centers identified from primary sources, spread across 17 cities and counties and run by 14 operators. The largest concentration is Stamford, with 9 data centers, followed by Hartford with 3 and Norwalk with 3.
The operators with the most data centers in Connecticut are Lumen (8), CyrusOne (3), Cloudpath (3), Crown Castle (2), Encompass Digital Media (2). Colocation and interconnection providers appear most often because they publish building-level detail; hyperscale campuses appear where the operator or the county names the individual buildings.
Not every operator discloses size. In Connecticut, 5 publish a floor area and 4 publish a power figure, and each figure is shown against the data center it belongs to rather than added into one number. They are not the same measurement: one operator states the floor area of a single building, another the full capacity of a campus it has only announced.
ISO-NE runs the wholesale power market and the high-voltage grid for all of Connecticut. 1 statewide measure governing data centers is on record, alongside 1 local pause. 2 named projects in Connecticut are delayed, blocked or under challenge.
Connecticut data centers by city
Every data center identified in Connecticut, grouped by the city or county it stands in, 33 of them across 17 places. Each entry names the operator and links to the source that states it.
Data centers in Stamford, Connecticut
- Cloudpath CT1 (26 Fahey St) Cloudpath 26 Fahey Street 1 networks
- Cloudpath CT19 (5 Landmark Sq) Cloudpath 5 Landmark Square 2 networks
- Cloudpath CT2 (1351 Washington Blvd) Cloudpath 1351 washington blvd 1 networks
- Crown Castle Stamford Crown Castle 1351 Washington Blvd 1 networks
- Encompass Glenbrook Teleport Encompass Digital Media 652 Glenbrook Road
- Encompass Stamford Encompass Digital Media 250 Harbor Drive 150,000 sq ft
- Lumen Network Colocation market: Stamford, CT Lumen
- Lumen Stamford Lumen 21 Harborview Ave 1 networks
- Omega CT1 Omega Systems Consultants 26 Fahey Street
Data centers in Hartford, Connecticut
- Crown Castle Hartford (960 Main) Crown Castle 960 Main St
- Lumen Hartford Lumen 155 Locust Street 1 networks
- Lumen Network Colocation market: Hartford, CT Lumen
Data centers in Norwalk, Connecticut
- CyrusOne Norwalk CyrusOne
- CyrusOne Norwalk CyrusOne 6 Norden Place (f/k/a 10 Norden Place) 3 networks
- NYM5 CyrusOne 168,000 sq ft4 MW
Data centers in New Haven, Connecticut
- Lumen Network Colocation market: New Haven, CT Lumen
- Lumen New Haven Lumen 54 Meadow Street 1 networks
Data centers in Shelton, Connecticut
- CAPS Shelton data center CAPS Two Enterprise Dr., Suite 200
- PROJECT BLUESTONE DATA CENTER 32 SHELTON TECHNOLOGY CTR
Data centers in Waterbury, Connecticut
- HDC1 - 108 Bank St Colocation America 108 Bank Street, 5th Floor 3,000 sq ft
- TierPoint Waterbury TierPoint 108 Bank St 1 networks
Data centers in Bristol, Connecticut
- Gray Wolf Data Centers data center Gray Wolf Data Centers 3 MW
Data centers in Colchester, Connecticut
- Gray Wolf Data Centers data center Gray Wolf Data Centers 4 MW
Data centers in East Hartford, Connecticut
- HTFDCT Verizon Wireless 1 Gold St. 10 Bushnell Plaza Mailing address: Hartford
Data centers in Glastonbury Center, Connecticut
- Ergonomic Group 65 Kreiger Lane Mailing address: Glastonbury
Data centers in New London, Connecticut
- Lumen New London Lumen 3 Shaws Cove 1 networks
Data centers in Southbury, Connecticut
- SD Satellite Ground Station - Southbury SD Data Center
Data centers in Trumbull, Connecticut
- Trumbull Data Center (Colocation Data Center) Aphorio Carter 227,552 sq ft15 MW
Data centers in West Haven, Connecticut
- Lumen West Haven Lumen 2 Horton Place 1 networks
Data centers in Unincorporated New Haven County, Connecticut
- SD / Comsat Southbury Ground Station SD Data Center 2120 River Rd Mailing address: Southbury 1 networks
- Data center building 20 Alexander Drive Mailing address: Wallingford
Data centers in Unincorporated Fairfield County, Connecticut
- Aphorio Carter Trumbull Data Center Aphorio Carter 60-80 Merritt Boulevard Mailing address: Trumbull 1 networks
Data centers in Elsewhere in Connecticut
- Connecticut data center Blue Hill Data Services 24,000 sq ft
Floor area and power appear only where the operator or a government record publishes them. A building the sources describe without naming it is listed as a data center building at its county.
Where they cluster, and who runs them
Facilities by county 4
Operators 14
Cities 14
The rules and the pipeline in Connecticut
Connecticut has 1 state measure on record (failed), 1 local pause, and 0 state or local water measures. ISO-NE runs the grid there. Each tracker below holds the full record for Connecticut, with every entry sourced.
Connecticut's neighbors
Connecticut data centers, answered from the record
How many data centers are in Connecticut?
The industry reference count for Connecticut is 52 facilities. This map places 33 of them from primary sources, each with a source record you can open, and every entry names the operator, the county, and the grid operator that serves it. The rest are mostly small regional colocation providers and enterprise buildings that no public register describes.
Where are Connecticut's data centers?
They are listed on this page city by city. By city: Stamford (9), Norwalk (3), Hartford (3), Shelton (2). By county: Fairfield County (16), New Haven County (8), Hartford County (6). Every data center identified in Connecticut appears under the city or county it stands in, with its operator and the source that names it.
Who operates data centers in Connecticut?
14 operators appear in the registers for Connecticut. The largest by facility count: Lumen (8), CyrusOne (3), Cloudpath (3), Crown Castle (2), Encompass Digital Media (2). Interconnection-heavy providers are over-represented because PeeringDB records where networks meet; hyperscalers appear where contributors have mapped their buildings.
Does Connecticut have a data center moratorium?
Connecticut has 1 state measure on record: SB 245: Repeal of data center tax incentives (failed, May 2026). 1 city or county pause is on record locally. The Connecticut Data Center Moratorium Tracker carries each measure with its primary source and a weekly changelog.
Which grid operator serves Connecticut data centers?
ISO-NE runs the wholesale power market and the high-voltage transmission system for all of Connecticut. Entire state in ISO-NE.
Are new data centers being built or delayed in Connecticut?
2 named projects in Connecticut are delayed, blocked, or under challenge, with 2 local restrictions, 0 jurisdictional actions, 0 utility dockets, and 0 flagged queue row or large-load studys. The capital atlas records 0 named sites in Connecticut and 0 projects blocked, delayed, or halted.
Facility layer: PeeringDB (Acceptable Use Policy), OpenStreetMap (ODbL, © OpenStreetMap contributors), Wikidata (CC0), US Census Bureau boundaries. Tracker layers: the SAVRN Moratorium Tracker, Water Tracker, Grid Operator Watchlist, Delay Watchlist, and Capital Atlas, each primary-sourced. Method on the national map.
Connecticut across the SAVRN trackers
The same state followed through the money, the policy, the water and the delays. Each page is primary-sourced and refreshed on its own schedule, and each links back here.