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Datacenter Sites in Pennsylvania

Pennsylvania has 6,497 scored datacenter candidate sites averaging 52.1/100 DC Readiness. Former Mine parcels lead the inventory (3,356 sites). Most sites interconnect through PJM. The state's candidate sites carry a catalogued aggregate of 155.6k MW and average a 3.6 yrs interconnection-queue wait.

At a glance

Pennsylvania has 6,497 scored datacenter candidate sites, the 5th-most of the 50 states, DC and Puerto Rico, averaging 52.1/100 DC Readiness against a national average of 53.0. Its average score ranks 39th among states. The state also has 32 operating datacenters and 43 internet exchange facilities on record.

6,497
Candidate sites
52.1/100
Avg DC Readiness
155.6k MW
Catalogued capacity
theoretical aggregate
3.6 yrs
Avg queue wait
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≥ 7560–7540–60≤ 40
Top 25 in Pennsylvania

How does Pennsylvania compare with other states for datacenter sites?

By number of scored candidate sites, Pennsylvania ranks 5th of the 50 states, DC and Puerto Rico (6,497 of 147,272 nationally, 4.4%). Its average DC Readiness of 52.1/100 ranks 39th and is roughly in line with the national average of 53.0. The average interconnection-queue wait at its sites, 3.6-year, is the 11th-shortest of the group (national 4.2-year).

Across the five headline sub-scores, Pennsylvania is strongest relative to the nation on water (89.1 vs 72.3 nationally) and weakest on speed to power (38.7 vs 50.0). Power and speed to power carry 20% of the score each, fiber 12%, water 7% and hazard 6%.

Which counties in Pennsylvania have the most datacenter sites?

Allegheny County (411 sites, average 56.5), Schuylkill County (409 sites, average 50.1), and Philadelphia County (381 sites, average 56.3) hold the largest inventories. Together the top 3 account for 18% of the state's scored sites. Delaware County has the highest average score among counties with at least 10 sites (62.4/100). 65 counties have five or more scored sites and their own county page.

What kinds of sites and grid regions are in Pennsylvania?

Former Mine parcels are the largest category (3,356, 52%), followed by industrial (1,262) and greenfield (973). Sites span 3 grid regions; PJM covers 100% of them.

By site type

By grid region

Average sub-score profile

How Pennsylvania's candidate sites score on each DC Readiness dimension (0–100 average).

Power availability
34.1
Speed-to-power
38.7
Fiber
68.0
Water
89.1
Hazard resilience
70.6

Top 25 datacenter sites in Pennsylvania

Ranked by DC Readiness.

Top datacenter sites in Pennsylvania
SiteTypeCountyVoltageCapacityQueue waitScore
CROMBYSubstation-AdjacentMontgomery County230 kV300 MW3.6 yrs70.0
EDDYSTONESubstation-AdjacentDelaware County230 kV300 MW3.6 yrs69.2
BRUNOT ISLANDSubstation-AdjacentAllegheny County345 kV600 MW3.6 yrs69.0
WHITPAINSubstation-AdjacentMontgomery County500 kV1,000 MW3.6 yrs68.9
LIMERICK (500KV SUB)Substation-AdjacentMontgomery County500 kV1,000 MW3.6 yrs68.8
UNKNOWN171809Substation-AdjacentLehigh County500 kV1,000 MW3.6 yrs68.6
CENTERPOINTSubstation-AdjacentMontgomery County500 kV1,000 MW3.6 yrs68.6
ELROYSubstation-AdjacentMontgomery County500 kV1,000 MW3.6 yrs68.3
SCHUYLKILLSubstation-AdjacentPhiladelphia County230 kV300 MW3.6 yrs68.3
Hazelwood Green’s Mill 19 SolarBrownfieldAllegheny—2 MW3.6 yrs68.1
CABOTSubstation-AdjacentButler County500 kV1,000 MW3.6 yrs67.7
WESCOSVILLESubstation-AdjacentLehigh County500 kV1,000 MW3.6 yrs67.3
ALBURTISSubstation-AdjacentLehigh County500 kV1,000 MW3.6 yrs67.3
Paseo Verde South ApartmentsBrownfieldPhiladelphia230 kV—3.6 yrs67.3
SUNBURYSubstation-AdjacentNorthumberland County500 kV1,000 MW3.6 yrs67.1
HOSENSACKSubstation-AdjacentLehigh County500 kV1,000 MW3.6 yrs67.0
UNKNOWN123737Substation-AdjacentNorthampton County500 kV1,000 MW3.6 yrs66.7
SUSQUEHANNASubstation-AdjacentLuzerne County500 kV1,000 MW3.6 yrs66.7
TAP151899Substation-AdjacentAllegheny County345 kV600 MW3.6 yrs66.5
SOUTH READINGSubstation-AdjacentBerks County230 kV300 MW3.6 yrs66.4
KEYSTONESubstation-AdjacentArmstrong County500 kV1,000 MW3.6 yrs66.2
CRANBERRYSubstation-AdjacentBeaver County500 kV1,000 MW3.6 yrs66.1
UNKNOWN123696Substation-AdjacentArmstrong County500 kV1,000 MW3.6 yrs66.1
HOMER CITYSubstation-AdjacentIndiana County345 kV600 MW3.6 yrs66.1
DELTA YORK ECSubstation-AdjacentHarford County500 kV1,000 MW3.6 yrs65.9

Counties in Pennsylvania

65 counties with five or more scored sites.

Allegheny County411 · 56.5Schuylkill County409 · 50.1Philadelphia County381 · 56.3Westmoreland County313 · 51.0Clearfield County265 · 50.0Somerset County264 · 48.3Fayette County262 · 49.8Susquehanna County256 · 51.6Luzerne County224 · 53.0Cambria County202 · 49.4Indiana County179 · 50.7Armstrong County175 · 53.1Washington County173 · 52.7Northumberland County148 · 49.1Bradford County140 · 51.2Montgomery County124 · 57.5Lackawanna County122 · 51.8Jefferson County121 · 49.6Butler County117 · 55.0Greene County117 · 50.2Lehigh County108 · 56.2Northampton108 · 54.4Dauphin County107 · 52.4York County104 · 53.8Lancaster County94 · 54.2Clarion County93 · 51.2Lycoming County83 · 50.6Centre County77 · 52.3Beaver County72 · 54.4Lawrence County69 · 53.1Chester County61 · 57.2Elk County54 · 51.7Mercer County54 · 52.7Venango County51 · 51.8Berks County50 · 57.4Bucks County50 · 54.8Carbon County49 · 52.2Wyoming46 · 51.9Erie County43 · 50.0Delaware County41 · 62.4Cumberland40 · 53.9Wayne County39 · 49.8Columbia County35 · 52.1Bedford County31 · 49.1Clinton County31 · 50.6Monroe County31 · 53.2Blair County27 · 54.6Montour County24 · 54.8Warren County24 · 53.5Potter County23 · 50.0Crawford County22 · 51.5Franklin County21 · 53.0Huntingdon County20 · 50.6Snyder County20 · 51.9Tioga County20 · 50.9Adams County18 · 53.8Pike County15 · 51.3Lebanon County13 · 55.6McKean County13 · 52.9Fulton County12 · 50.1Mifflin County11 · 53.2Sullivan County8 · 51.8Perry County7 · 52.1Cameron County6 · 57.8Juniata County5 · 52.1

Sites in Pennsylvania counties with fewer than five sites

5 scored sites sit in counties too small for a county page of their own.

Operating datacenters in Pennsylvania

32 operating datacenter facilities in Pennsylvania are on record, the 23rd-most of any state. Pittsburgh has the largest cluster (10 facilities). The operators with the most facilities here are Flexential (3), Colocation America Corporation (2), TierPoint, LLC (2). Footprints are recorded for 8 of them, totalling about 0.6 million square feet.

Pittsburgh (10)

Philadelphia (5)

Bethlehem (2)

Reading (2)

Allentown (1)

Audubon (1)

Berwick (1)

Boyers (1)

Breinigsville (1)

Butler (1)

Collegeville (1)

Freeport (1)

King of Prussia (1)

Salem Township (1)

State College (1)

City not recorded (1)

Internet exchange and peering facilities in Pennsylvania

43 peering and colocation facilities in Pennsylvania are listed in PeeringDB. Philadelphia has the most (14). The best-connected facility hosts 48 networks; the median facility in the state hosts 2 networks.

Bethlehem (3)

Breinigsville (2)

Reading (2)

Audubon (1)

Butler (1)

Conshohocken (1)

Freeport (1)

Norristown (1)

State College (1)

Suzano (1)

Pennsylvania datacenter site selection FAQ

How many datacenter sites are in Pennsylvania?

GridCensus catalogs 6,497 scored datacenter candidate sites in Pennsylvania, with an average DC Readiness score of 52.1/100. That is the 5th-largest inventory of the 50 states, DC and Puerto Rico.

How many operating datacenters are in Pennsylvania?

32 operating datacenter facilities in Pennsylvania are on record, the 23rd-most of any state. Pittsburgh has the most (10). Flexential operates the most facilities in the state (3).

What is the average interconnection-queue wait in Pennsylvania?

Candidate sites in Pennsylvania average a 3.6-year interconnection-queue wait, with an average queue depth of 74 projects. The national average across all scored sites is 4.2-year, and Pennsylvania has the 11th-shortest average wait of the 50 states, DC and Puerto Rico.

Which county in Pennsylvania has the most datacenter sites?

Allegheny County has the most scored candidate sites in Pennsylvania (411), followed by Schuylkill County (409) and Philadelphia County (381). Among counties with at least 10 sites, Delaware County has the highest average DC Readiness (62.4/100).

What kind of datacenter sites are most common in Pennsylvania?

Former Mine sites are the most common category in Pennsylvania (3,356 sites, 52% of the inventory), and most sites fall within the PJM grid region.

How many internet exchange facilities are in Pennsylvania?

43 peering and colocation facilities listed in PeeringDB are in Pennsylvania. Philadelphia has the most (14). The best-connected one hosts 48 networks.

Looking for a specific record? The directory lists every scored datacenter site in Pennsylvania, A to Z.

More Pennsylvania infrastructure

About this data

Source: GridCensus composite of HIFLD transmission and substation data, EIA, FEMA National Risk Index, FCC broadband data, PeeringDB and ISO interconnection queues, as published November 12, 2026 — GridCensus refreshes it monthly. See the methodology for how records are matched, cleaned and scored.

Cite as: GridCensus, “Datacenter candidate sites in Pennsylvania”, https://gridcensus.com/datacenter-sites/pennsylvania (data as of November 12, 2026).

Dataset updated . Screening estimates derived from public data sources.

Go deeper than the public screen

Every site and score for Pennsylvania is free to browse. Pro adds Watchtower on 25 sites, alerts when new candidate sites, datacenters or interconnection-queue requests appear in your markets, score and capacity history, and CSV export. Enterprise adds team seats, weekly data files for all 147,272 sites, the REST API and an MCP server for AI tools.

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