Static snapshot. This site serves two different things: 1,853 data centres reported by OpenStreetMap contributors nationwide, and 13 sites Helios infers from Arizona parcel records, exported on July 29, 2026. The first is a map of what has been recorded; the second is an argued hypothesis with an evidence chain. This is a point-in-time export, not a live view. See meta.json or the methodology.

NJ

State · 51 data centres recorded in OpenStreetMap

Mapped facilities
51
on the map today
Floor area
0.59
km² across 44 buildings
Share of US load
645
MW, inferred upper bound
Water
1.40
million gal/day, inferred
4 of these 51 are not mapped as buildings, so no power figure is estimated for them. 4 are campus boundaries covering 0.14 km² of land. The megawatt figure above divides a national total by building floor area, and the area of a land parcel is not floor area. A site still being built consumed none of the electricity that total measures. Both are counted here and left out of the estimate rather than folded into it, so this region's load is understated by however much those represent.

When these appeared on the map

observed, not surveyed
02753201620182019202020212022202320252025
Data centres recorded in OpenStreetMap at the end of each month. The hatched stretch is before 2017-01, when telecom=data_center was not yet in common use — the near-zero readings there describe the tag, not the country. This is a count of what has been mapped, and OpenStreetMap carries no construction dates.

What the grid here looks like

reported by OSM contributors
Substations
430
69 kV and above
Bulk substations
207
230 kV and above
Highest voltage
500
kV, present in this state
Generating capacity
17,141
MW across 519 plants

A facility drawing hundreds of megawatts connects at bulk transmission voltage, so the second figure matters more than the first: forty 69 kV yards are not a substitute for one 500 kV substation. 204 of the plants here carry no capacity tag, so the megawatt total is a floor rather than the region's output.

Proximity is not connection. Nothing here shows that any facility has contracted power from any of these substations. That gets settled in interconnection filings Helios cannot read, and in several regions those queues now run for years. A county showing no substations may have none mapped rather than none standing.

Largest named mapped records

by mapped area
NameOperatorMapped asMapped area m²Share MWFirst mapped
IO Datacenternot recordedBuilding77,10184.52021-09-19
EquinixEquinixCampus boundary49,7132025-05-06
CoreSite Secaucus CampusCoreSiteCampus boundary38,9542024-04-23
Equinix New York Secaucus NY2EquinixBuilding37,43641.02016-12-17
Barclays DatacenterBarclaysBuilding32,72835.92024-10-04
QTS Piscataway Data CenterQuality Technology ServicesBuilding31,90735.02017-10-10
CyrusOne SomersetCyrusOneBuilding29,59732.42024-12-25
Equinix New York Secaucus NY4EquinixBuilding29,47632.32016-12-17
Digital Realty New York EWR12Digital RealtyBuilding28,13130.82016-12-17
Goldman Sachsnot recordedBuilding25,70928.22021-06-20
Equinix NY3EquinixBuilding25,48627.92025-05-06
Equinix New York Secaucus NY5EquinixBuilding19,64521.52016-12-17
NYSE Data CenternyseBuilding18,65520.42019-09-28
Verizon Wireless NE Headquartersnot recordedBuilding14,55715.92024-12-25
Centersquare NYC3 Data CenterCentersquareBuilding13,30014.62023-04-26
Credit Suisse: Clifton Data Centernot recordedBuilding13,03214.32025-12-27
Digital Realty New Jersey EWR10Digital RealtyBuilding11,79512.92016-12-17
BNY Mellon Somersetnot recordedBuilding11,24212.32016-12-17
BT Radianz: 492 River RoadbtBuilding10,02011.02025-12-27
Evocative SecaucusEvocativeBuilding9,41210.32025-01-03
Digital Realty New York EWR11Digital RealtyBuilding8,9299.82016-12-17
165 Halsey / Equinix NY1 / Databank EWR1TishmanBuilding8,3029.12025-05-06
PSE&G Delivery Emergency Response CenterPSE&GBuilding7,9008.72019-08-17
Digital Realty New Jersey EWR21Digital RealtyBuilding6,6567.32016-12-17
Equinix Secaucus NY6EquinixBuilding6,5907.22025-01-03
Equinix NY7 Data CenterEquinixBuilding6,3787.02016-12-17
Optimumnot recordedBuilding6,3296.92021-08-10
EquinixEquinixBuilding5,7916.32021-08-10
Cyxtera (Digital Realty Trust) Citibank Data CenterCyxteraBuilding5,4225.92016-12-17
Rackspace Belmont NYC2not recordedBuilding5,3395.82024-12-25
DataBank Piscataway EWR2not recordedBuilding4,7055.22016-12-17
CoreSite NY3CoreSiteBuilding3,6864.02025-05-06
Verizon Wireline Network Buildingnot recordedBuilding2,9963.32021-08-11
Digital Realty New Jersey EWR20Digital RealtyBuilding2,7513.02016-12-17
365 Bridgewater NJnot recordedBuilding2,6452.92024-12-25
Apollo Cable Landing StationApolloBuilding2,4072.62016-12-12
Rackspace Somerset NYC1not recordedBuilding1,7101.92024-12-25
Vital Recordsnot recordedBuilding7380.82022-02-08
Open Data Centers Piscatawaynot recordedPoint2024-12-25
H5 SecaucusH5Point2025-01-03

“First mapped” is when OpenStreetMap recorded the facility, not when it was built — OpenStreetMap carries no construction dates. Mapped area means a building floor plate, campus boundary, or construction polygon according to the “Mapped as” column; those quantities are never added together. The megawatt column appears only for buildings and is their floor-area share of a reported national total, not a measurement.