How many data centers are in ISO-NE?

There are 3562 data centers in ISO-NE, including 1304 operating and 2213 planned facilities.

What is the total data center capacity in ISO-NE?

The total data center capacity in ISO-NE is 457,690 MW, with 62,052 MW operating and 386,751 MW planned.

What is the largest operating data center in ISO-NE?

The largest operating data center in ISO-NE is Colossus 2 Macrohard, developed by xAI, with a capacity of 1,085 MW.

What is the largest planned data center in ISO-NE?

The largest planned data center in ISO-NE is Delta Gigasite - Expansion, being developed by Creekstone Energy, with a planned capacity of 9,700 MW.

How many data center developers are active in ISO-NE?

There are 383 unique data center developers with projects in ISO-NE.

Data Centers in ISO-NE

Explore operating and planned data center projects in ISO-NE.

Last updated: September 2026

There are 1304 operating data centers in ISO-NE with a combined capacity of 62,052 MW, and 2213 planned projects that would add 386,751 MW of additional capacity. Explore the map and tables below for details.

Total Data Centers

3,562

Operating Data Centers

1,304

Planned Data Centers

2,213

Operating Capacity

62,052 MW

Planned Capacity

386,751 MW

Unique Developers

383

ISO-NE Data Center Map

Map of data centers in ISO-NE. Orange markers indicate operating facilities and green markers show planned projects. Marker size reflects capacity — only facilities with reported capacity data are shown.

Largest Operating Data Centers in ISO-NE

Colossus 2 Macrohard

1,085 MW

Year Operational: 2025

Location: Shelby, Tennessee

Developer: xAI

Colossus 2 Macroharder

735 MW

Year Operational: 2026

Location: DeSoto, Mississippi

Developer: xAI

Riot Platforms Rockdale

700 MW

Year Operational: 2020

Location: Milam, Texas

Developer: Riot Platforms

EdgeCore Mesa: PH03

450 MW

Year Operational: 2025

Location: Maricopa, Arizona

Developer: EdgeCore

Microsoft Fairwater B1 (MKE03)

338 MW

Year Operational: 2026

Location: Racine, Wisconsin

Developer: Microsoft

Colossus 1

300 MW

Year Operational: 2025

Location: Shelby, Tennessee

Developer: xAI

Stream Data Center: San Antonio III - VII

280 MW

Year Operational: 2025

Location: Bexar, Texas

Developer: Stream Data Centers

Stream Data Center: Phoenix I-VII

280 MW

Year Operational: 2024

Location: Maricopa, Arizona

Developer: Stream Data Centers

Hut 8 King Mountain (Crypto mining)

280 MW

Year Operational: 2022

Location: Upton, Texas

Developer: Hut 8

Largest Planned Data Centers in ISO-NE

Delta Gigasite - Expansion

9,700 MW

Expected Year: TBD

Location: Millard, Utah

Developer: Creekstone Energy

New Era Lea Data Center

7,000 MW

Expected Year: TBD

Location: Lea, New Mexico

Developer: New Era Energy

Wonder Valley (Stratos Project) - Phase 2 (Expansion)

6,000 MW

Expected Year: TBD

Location: Box Elder, Utah

Developer: O'Leary Digital

Monarch Compute Campus - Phase 2

6,000 MW

Expected Year: TBD

Location: Mason, West Virginia

Developer: Nscale

Fermi Project Matador - Expansion (Gas)

5,778 MW

Expected Year: TBD

Location: Carson, Texas

Developer: Fermi America

Nexus Hubbard - Expansion

5,630 MW

Expected Year: TBD

Location: Hill, Texas

Developer: Nexus Data Centers

Fermi Project Matador East - Expansion (Gas)

5,000 MW

Expected Year: TBD

Location: Carson, Texas

Developer: Fermi America

Data City - Expansion

4,700 MW

Expected Year: TBD

Location: Webb, Texas

Developer: Energy Abundance Development Corporation

Fermi Project Matador - Expansion (Nuclear AP1000)

4,400 MW

Expected Year: TBD

Location: Carson, Texas

Developer: Fermi America

Frequently Asked Questions

How many data centers are in ISO-NE?: There are 3562 data centers in ISO-NE, including 1304 operating and 2213 planned facilities.
What is the total data center capacity in ISO-NE?: The total data center capacity in ISO-NE is 457,690 MW, with 62,052 MW operating and 386,751 MW planned.
What is the largest operating data center in ISO-NE?: The largest operating data center in ISO-NE is Colossus 2 Macrohard, developed by xAI, with a capacity of 1,085 MW.
What is the largest planned data center in ISO-NE?: The largest planned data center in ISO-NE is Delta Gigasite - Expansion, being developed by Creekstone Energy, with a planned capacity of 9,700 MW.
How many data center developers are active in ISO-NE?: There are 383 unique data center developers with projects in ISO-NE.

ISO-NE Data Center Map

Largest Operating Data Centers in ISO-NE

Colossus 2 Macrohard

Colossus 2 Macroharder

Riot Platforms Rockdale

EdgeCore Mesa: PH03

Microsoft Fairwater B1 (MKE03)

Colossus 1

Stream Data Center: San Antonio III - VII

Stream Data Center: Phoenix I-VII

Hut 8 King Mountain (Crypto mining)

Largest Planned Data Centers in ISO-NE

Delta Gigasite - Expansion

New Era Lea Data Center

Wonder Valley (Stratos Project) - Phase 2 (Expansion)

Monarch Compute Campus - Phase 2

Fermi Project Matador - Expansion (Gas)

Nexus Hubbard - Expansion

Fermi Project Matador East - Expansion (Gas)

Data City - Expansion

Fermi Project Matador - Expansion (Nuclear AP1000)

Frequently Asked Questions

Explore Data Centers by State

ISO-NE Data Center Map

Largest Operating Data Centers in ISO-NE

Colossus 2 Macrohard

Colossus 2 Macroharder

Riot Platforms Rockdale

EdgeCore Mesa: PH03

Microsoft Fairwater B1 (MKE03)

Colossus 1

Stream Data Center: San Antonio III - VII

Stream Data Center: Phoenix I-VII

Hut 8 King Mountain (Crypto mining)

Largest Planned Data Centers in ISO-NE

Delta Gigasite - Expansion

New Era Lea Data Center

Wonder Valley (Stratos Project) - Phase 2 (Expansion)

Monarch Compute Campus - Phase 2

Fermi Project Matador - Expansion (Gas)

Nexus Hubbard - Expansion

Fermi Project Matador East - Expansion (Gas)

Data City - Expansion

Fermi Project Matador - Expansion (Nuclear AP1000)

Frequently Asked Questions

Explore Data Centers by State