AI data center sites in Illinois

97 Illinois counties scored on transmission, the interconnection queue, power price and tax. Updated October 18, 2026.

Open a county for its queue requests, substations, plants and data centers.

CountyScorePipelinePower price
783.7 GW10.2¢/kWh
70952 MW10.2¢/kWh
63835 MW10.2¢/kWh
622.5 GW10.2¢/kWh
619.1 GW10.2¢/kWh
6114 MW10.2¢/kWh
601 GW10.2¢/kWh
594.8 GW10.2¢/kWh
563.1 GW10.2¢/kWh
562.8 GW10.2¢/kWh
561.2 GW10.2¢/kWh
551.3 GW10.2¢/kWh
542.1 GW10.2¢/kWh
541.9 GW10.2¢/kWh
541.3 GW10.2¢/kWh
541.3 GW10.2¢/kWh
541.2 GW10.2¢/kWh
521.2 GW10.2¢/kWh
513.1 GW10.2¢/kWh
512.1 GW10.2¢/kWh
51250 MW10.2¢/kWh
50350 MW10.2¢/kWh
492.5 GW10.2¢/kWh
49975 MW10.2¢/kWh
49822 MW10.2¢/kWh
49225 MW10.2¢/kWh
461.1 GW10.2¢/kWh
451.8 GW10.2¢/kWh
451.1 GW10.2¢/kWh
45820 MW10.2¢/kWh
45700 MW10.2¢/kWh
45699 MW10.2¢/kWh
45213 MW10.2¢/kWh
441.5 GW10.2¢/kWh
44743 MW10.2¢/kWh
43171 MW10.2¢/kWh
422.5 GW10.2¢/kWh
421.6 GW10.2¢/kWh
42831 MW10.2¢/kWh
42610 MW10.2¢/kWh
41303 MW10.2¢/kWh
40835 MW10.2¢/kWh
40835 MW10.2¢/kWh
40694 MW10.2¢/kWh
40550 MW10.2¢/kWh
402 MW10.2¢/kWh
39300 MW10.2¢/kWh
37200 MW10.2¢/kWh
3730 MW10.2¢/kWh
362 GW10.2¢/kWh

Pipeline: active generation and storage requests in the ISO queue, or EIA planned plants where larger (outside the ISOs). Top kV: highest substation voltage. Power price: the state's industrial average. DCs: GPU colocation, mining sites and AI campuses.

What the data shows

The strongest Illinois counties for a large AI load are Will County (78), Cook County (70) and Lake County (63) on the site score. Illinois sits in MISO, PJM and utility territory; its ISO queues hold 88 GW of active generation and storage requests, 2.9 GW of them with a signed interconnection agreement, and it has 123 substations at 345 kV and up.

Industrial power averaged 10.2¢/kWh (EIA, July 2026 YTD), against 10.0¢/kWh a year earlier, the 35th lowest of the 50 states and DC. Illinois has paused new applications for its data center sales tax exemption. We track 3 AI campuses and 69 GPU-ready colocation facilities here.

Top 6 counties in detail

1. Will CountyPJM

Site score 78 of 100

Transmission
25/25
Generation pipeline
14/20
Industrial power price
15/20
Existing and retiring plants
15/15
Sales tax exemption
4/10
Data center activity
4/10
Market
PJM
Queue (active)
3.7 GW
Agreement signed
60 MW
Planned plants (EIA)
17 MW
Top substation
765 kV
Substations 230 kV+
15
Operating plants
6.9 GW
Retired or retiring
3.1 GW
Industrial power, IL
10.2¢/kWh
Sales tax exemption
Paused

Largest queue requests

ProjectPoint of interconnectionMWTypeStage
Elwood 345 kVPJM AE1-070 - moved to TC1, in service 2020-12Elwood 345 kV1,610GasIn study
Braidwood-East Frankfort 345 kVPJM AF2-096 - moved to TC1, in service 2022-05Braidwood-East Frankfort 345 kV300SolarIn study
Will County Unit 4 CIR TransferPJM AJ1-014, in service 2027-06Will County Unit 4 CIR Transfer260StorageIn study
Wilton 345 kVPJM AG2-357, in service 2024-11Wilton 345 kV250StorageIn study
University Park 138 kVPJM AH1-560, in service 2025-06University Park 138 kV250StorageIn study
Will County Unit 4 CIR TransferPJM AJ1-013, in service 2027-06Will County Unit 4 CIR Transfer250StorageIn study
Goodings Grove 138 kVPJM AI1-154, in service 2027-01Goodings Grove 138 kV230StorageIn study
Wilton 345 kVPJM AH2-172, in service 2026-12Wilton 345 kV200SolarIn study

Substations, 115 kV and up

  • WILTON (345KV) · 6 lines765 kV
  • GOODINGS GROVE · 20 lines345 kV
  • EAST FRANKFORT · 14 lines345 kV
  • LOCKPORT · 12 lines345 kV
  • WOLFS CROSSING · 10 lines345 kV
  • JOLIET · 8 lines345 kV
  • JOLIET 29 · 6 lines345 kV
  • BRAIDWOOD · 6 lines345 kV

Planned, retiring and retired plants

  • Joliet 29 · Gas, retired 20231.3 GW
  • MPH Elwood · Gas, retired 2026768 MW
  • Will County · Coal, retired 2022598 MW
  • Joliet 9 · Gas, retired 2023360 MW

Data centers, AI campuses and mining sites

  • Joliet Technology Center · AI campus, announced, 1.8 GW · City of Joliet

Colocation from our GPU colocation list; mining sites from the miner AI conversion tracker.

2. Cook CountyPJM

Site score 70 of 100

Transmission
22/25
Generation pipeline
7/20
Industrial power price
15/20
Existing and retiring plants
11/15
Sales tax exemption
4/10
Data center activity
10/10
Market
PJM
Queue (active)
952 MW
Agreement signed
0 MW
Planned plants (EIA)
35 MW
Top substation
345 kV
Substations 230 kV+
18
Operating plants
1.4 GW
Retired or retiring
419 MW
Industrial power, IL
10.2¢/kWh
Sales tax exemption
Paused

Largest queue requests

ProjectPoint of interconnectionMWTypeStage
Calumet-Burnham 345 kVPJM AG1-298 - moved to TC1, in service 2023-06Calumet-Burnham 345 kV500StorageIn study
Burnham 138kVPJM AF2-441 - moved to TC1, in service 2024-05Burnham 138kV200StorageIn study
Chicago Heights 138kVPJM AI1-155, in service 2027-01Chicago Heights 138kV110StorageIn study
River EC 138 kVPJM AH1-663, in service 2024-05River EC 138 kV58StorageIn study
Matteson - East Frankfort 138 kVPJM AH2-380, in service 2026-03Matteson - East Frankfort 138 kV44Solar or wind + storageIn study
Calumet BESSPJM AF2-031, in service 2027-12Calumet20StorageIn study
I.C. Air Rights 12.5 kVPJM AH2-205, in service 2026-03I.C. Air Rights 12.5 kV10StorageIn study
I.C. Air Rights 12.5 kVPJM AH2-206, in service 2026-03I.C. Air Rights 12.5 kV10StorageIn study

Substations, 115 kV and up

  • COMMONWEALTH EDISON DES PLAINES (345KV) · 16 lines345 kV
  • BURNHAM · 15 lines345 kV
  • GOODINGS GROVE · 12 lines345 kV
  • SKOKIE (138 KV) · 12 lines345 kV
  • TOLLWAY · 10 lines345 kV
  • PROSPECT HEIGHTS · 10 lines345 kV
  • LOCKPORT · 9 lines345 kV
  • BEDFORD PARK · 9 lines345 kV

Planned, retiring and retired plants

  • Southeast Chicago Energy Project · Gas, retired 2024407 MW

Data centers, AI campuses and mining sites

  • HydraVault Chicago (South Wabash) · GPU colocation, Chicago, 20 MW, liquid cooling
  • Equinix CH5 · GPU colocation, Elk Grove Village, liquid cooling
  • Aligned Data Centers ORD-02 · GPU colocation, Northlake, 36 MW, liquid cooling
  • QTS Data Centers Chicago 1 · GPU colocation, Chicago, 42 MW
  • CoreSite CH2 · GPU colocation, Chicago, 18 MW, liquid cooling
  • 365 Data Centers Chicago (427 S LaSalle) · GPU colocation, Chicago
  • Aligned Data Centers ORD-03 · GPU colocation, Elk Grove Village, liquid cooling
  • Centersquare ORD1 (Chicago Cermak) · GPU colocation, Chicago, 32.8 MW
  • Centersquare ORD2 (Elk Grove Village) · GPU colocation, Elk Grove Village, 25.9 MW
  • Cogent Chicago - La Salle · GPU colocation, Chicago
  • Compass Datacenters Hoffman Estates campus (former Sears HQ) · GPU colocation, Hoffman Estates
  • CoreSite CH1 · GPU colocation, Chicago
  • Data Canopy Chicago (Mount Prospect, Apotech) · GPU colocation, Mount Prospect, 0.3 MW
  • DataBank ORD1 · GPU colocation, Chicago, 1 MW, liquid cooling
  • DataBank ORD2 · GPU colocation, Chicago, 2 MW
  • DataBank ORD3 · GPU colocation, Mount Prospect, 2.7 MW, liquid cooling
  • Digital Realty CH1 · GPU colocation, Elk Grove Village
  • Digital Realty CH2 · GPU colocation, Elk Grove Village
  • Digital Realty CH3 · GPU colocation, Elk Grove Village
  • Digital Realty ORD10 (350 East Cermak) · GPU colocation, Chicago
  • Digital Realty ORD11 · GPU colocation, Chicago
  • Digital Realty ORD12 (Digital Franklin Park) · GPU colocation, Franklin Park
  • Digital Realty ORD13 (Digital Franklin Park) · GPU colocation, Franklin Park
  • Digital Realty ORD14 (Digital Franklin Park) · GPU colocation, Franklin Park
  • Digital Realty ORD23 · GPU colocation, Northlake
  • EdgeConneX CHI01 · GPU colocation, Elk Grove Village, 24 MW
  • EdgeConneX CHI02 · GPU colocation, Elk Grove Village, 7 MW
  • EdgeConneX CHI03 · GPU colocation, Elk Grove Village, 22.4 MW
  • Equinix CH1 · GPU colocation, Chicago
  • Equinix CH2 · GPU colocation, Chicago
  • Equinix CH3 · GPU colocation, Elk Grove Village
  • Equinix CH4 · GPU colocation, Chicago
  • H5 Data Centers Chicago · GPU colocation, Chicago, 36 MW
  • Iron Mountain Data Centers CHI-1 · GPU colocation, Des Plaines, 36 MW, liquid cooling
  • Netrality 717 South Wells · GPU colocation, Chicago
  • Prime Data Centers ORD01-01 · GPU colocation, Elk Grove Village, 72 MW, liquid cooling
  • Prime Data Centers ORD01-02 · GPU colocation, Elk Grove Village, 54 MW
  • Prime Data Centers ORD01-03 · GPU colocation, Elk Grove Village, 54 MW
  • Skybox Datacenters Skybox Chicago I · GPU colocation, Elk Grove Village, 30 MW
  • STACK Infrastructure CHI01 campus (CHI01A, CHI01B) · GPU colocation, Elk Grove Village, 40 MW
  • STACK Infrastructure CHI02 · GPU colocation, Elk Grove Village, 36 MW
  • Stream Data Centers ORDA (Chicago I) · GPU colocation, Elk Grove Village, 31 MW
  • Stream Data Centers ORDB (Chicago II) · GPU colocation, Elk Grove Village, 32 MW
  • Stream Data Centers ORDC (Chicago III) · GPU colocation, Elk Grove Village, 40 MW
  • T5 Data Centers Chicago I · GPU colocation, Elk Grove Village
  • T5 Data Centers Chicago II · GPU colocation, Elk Grove Village
  • T5 Data Centers Chicago III · GPU colocation, Northlake
  • T5 Data Centers Chicago V · GPU colocation, Elk Grove Village, 36 MW
  • TierPoint Chicago (Polk St.) · GPU colocation, Chicago
  • TierPoint Chicago West · GPU colocation, Franklin Park

Colocation from our GPU colocation list; mining sites from the miner AI conversion tracker.

3. Lake CountyPJM

Site score 63 of 100

Transmission
22/25
Generation pipeline
6/20
Industrial power price
15/20
Existing and retiring plants
10/15
Sales tax exemption
4/10
Data center activity
5/10
Market
PJM
Queue (active)
835 MW
Agreement signed
0 MW
Planned plants (EIA)
5 MW
Top substation
345 kV
Substations 230 kV+
5
Operating plants
733 MW
Retired or retiring
689 MW
Industrial power, IL
10.2¢/kWh
Sales tax exemption
Paused

Largest queue requests

ProjectPoint of interconnectionMWTypeStage
Waukegan Unit 8 CIR TransferPJM AJ1-012, in service 2027-06Waukegan Unit 8 CIR Transfer354StorageIn study
Waukegan Unit 7 CIR TransferPJM AJ1-011, in service 2027-06Waukegan Unit 7 CIR Transfer328StorageIn study
Waukegan 138 kVPJM AH1-190, in service 2025-06Waukegan 138 kV80StorageIn study
Zion Energy Center 345 kVPJM AF2-027, in service 2021-06Zion Energy Center 345 kV50StorageIn study
Zion Energy Center 345 kVPJM AH1-045, in service 2023-06Zion Energy Center 345 kV23SolarIn study

Substations, 115 kV and up

  • ZION · 13 lines345 kV
  • LIBERTYVILLE · 8 lines345 kV
  • Unnamed · 8 lines345 kV
  • ZION · 6 lines345 kV
  • Unnamed · 4 lines345 kV
  • Unnamed · 6 lines138 kV
  • Unnamed · 6 lines138 kV
  • Unnamed · 4 lines138 kV

Planned, retiring and retired plants

  • Waukegan · Coal, retired 2022682 MW

Data centers, AI campuses and mining sites

  • T5@Chicago IV (Grayslake) · AI campus, announced, 1.6 GW · Blackridge Research
  • T5 Data Centers Chicago IV · GPU colocation, Grayslake

Colocation from our GPU colocation list; mining sites from the miner AI conversion tracker.

4. Christian CountyPJM

Site score 62 of 100

Transmission
16/25
Generation pipeline
13/20
Industrial power price
15/20
Existing and retiring plants
13/15
Sales tax exemption
4/10
Data center activity
0/10
Market
PJM
Queue (active)
2.5 GW
Agreement signed
260 MW
Planned plants (EIA)
0 MW
Top substation
345 kV
Substations 230 kV+
2
Operating plants
1.3 GW
Retired or retiring
1.3 GW
Industrial power, IL
10.2¢/kWh
Sales tax exemption
Paused

Largest queue requests

ProjectPoint of interconnectionMWTypeStage
7COFFEEN - 7PANA 345.0kVMISO J2694, in service 2027-047COFFEEN - 7PANA 345.0kV500Solar or wind + storageIn study
Kincaid-Pana 345 kVPJM AE2-261 - moved to TC1, in service 2022-06Kincaid-Pana 345 kV299SolarIn study
Kincaid-Pana 345kVPJM AI2-133, in service 2026-10Kincaid-Pana 345kV260SolarIn study
Pana 138 kVMISO J4198, in service 2030-01Pana 138 kV250StorageIn study
7FARADAY - 7PANA 345.0kVMISO J2973, in service 2026-087FARADAY - 7PANA 345.0kV250SolarIn study
7AUSTIN - 7PANA 345.0kVMISO J3954, in service 2030-107AUSTIN - 7PANA 345.0kV250SolarIn study
Broomstick Solar Energy Centergy CenterPJM AD2-100, in service 2028-12Kincaid-Pana 345 kV210SolarAgreement signed
Kincaid-PanaPJM AF1-090, in service 2022-09Kincaid-Pana200WindIn study

Substations, 115 kV and up

  • PANA · 9 lines345 kV
  • KINCAID STATION · 4 lines345 kV
  • PANA NORTH · 6 lines138 kV
  • TAYLORVILLE SOUTH · 3 lines138 kV

Planned, retiring and retired plants

  • Kincaid Generation LLC · Coal, retiring 20271.3 GW

5. Lee CountyPJM

Site score 61 of 100

Transmission
18/25
Generation pipeline
15/20
Industrial power price
15/20
Existing and retiring plants
9/15
Sales tax exemption
4/10
Data center activity
0/10
Market
PJM
Queue (active)
9.1 GW
Agreement signed
0 MW
Planned plants (EIA)
1.2 GW
Top substation
345 kV
Substations 230 kV+
3
Operating plants
2.3 GW
Retired or retiring
0 MW
Industrial power, IL
10.2¢/kWh
Sales tax exemption
Paused

Largest queue requests

ProjectPoint of interconnectionMWTypeStage
Nelson-Electric Junction 345 kVPJM AH2-089, in service 2027-12Nelson-Electric Junction 345 kV1,200StorageIn study
Nelson-Electric Junction 345kVPJM AH2-090, in service 2024-12Nelson-Electric Junction 345kV1,200StorageIn study
Nelson-Electric Junction 345kVPJM AH2-091, in service 2026-12Nelson-Electric Junction 345kV1,200StorageIn study
Byron to Wayne Thermal #1 ProjectPJM AB1-089, in service 2026-06Byron-Wayne 345kV #1575GasSuspended
Nelson-Electric Junction 345 kVPJM AF2-041 - moved to TC1, in service 2023-11Nelson-Electric Junction 345 kV300SolarIn study
Nelson-Lee County 345 kV IIPJM AF2-182 - moved to TC1, in service 2022-12Nelson-Lee County 345 kV II300SolarIn study
Nelson-Electric Junction 345 kVPJM AI2-012, in service 2027-12Nelson-Electric Junction 345 kV300StorageIn study
Nelson- Electrical Junction 345 kVPJM AG2-197, in service 2024-12Nelson- Electrical Junction 345 kV296WindIn study

Substations, 115 kV and up

  • NELSON · 10 lines345 kV
  • EASY ROAD · 3 lines345 kV
  • INVENERGY NELSON EXPANSION LLC · 1 lines345 kV
  • Unnamed · 5 lines138 kV
  • Unnamed · 4 lines138 kV
  • Unnamed · 3 lines138 kV
  • Unnamed · 3 lines138 kV
  • SHADY OAKS WIND FARM · 2 lines138 kV

Planned, retiring and retired plants

  • Steward Creek Solar Phase 1 · Solar, planned 20291.2 GW

6. DuPage CountyPJM

Site score 61 of 100

Transmission
22/25
Generation pipeline
1/20
Industrial power price
15/20
Existing and retiring plants
8/15
Sales tax exemption
4/10
Data center activity
10/10
Market
PJM
Queue (active)
0 MW
Agreement signed
0 MW
Planned plants (EIA)
14 MW
Top substation
345 kV
Substations 230 kV+
11
Operating plants
1.1 GW
Retired or retiring
28 MW
Industrial power, IL
10.2¢/kWh
Sales tax exemption
Paused

Substations, 115 kV and up

  • LOMBARD · 17 lines345 kV
  • ELECTRIC LIGHT 345 KV · 16 lines345 kV
  • WAYNE · 12 lines345 kV
  • ELMHURST · 12 lines345 kV
  • AURORA · 8 lines345 kV
  • Unnamed · 8 lines345 kV
  • ITASCA · 8 lines345 kV
  • AURORA · 6 lines345 kV

Data centers, AI campuses and mining sites

  • Colovore ORD02 · GPU colocation, West Chicago, 16 MW, liquid cooling
  • Data Canopy Chicago (Lombard) · GPU colocation, Lombard
  • Centersquare ORD4 (Lisle) · GPU colocation, Lisle, 88.9 MW
  • DataBank ORD4 · GPU colocation, Oak Brook, 8.75 MW
  • Element Critical Chicago One · GPU colocation, Wood Dale, 7 MW
  • Element Critical Chicago Two · GPU colocation, Wood Dale, 5 MW
  • Equinix CH7 · GPU colocation, Westmont
  • NTT Global Data Centers Chicago CH1 · GPU colocation, Itasca, 36 MW
  • NTT Global Data Centers Chicago CH2 · GPU colocation, Itasca
  • NTT Global Data Centers Chicago CH3 · GPU colocation, Itasca
  • US Signal IL01 · GPU colocation, Oak Brook, 0.25 MW

Colocation from our GPU colocation list; mining sites from the miner AI conversion tracker.

Data center tax exemption in Illinois

Illinois Data Center Investment Program (20 ILCS 605/605-1025)

Certified data centers may receive exemptions from state and local retailers' occupation, use, service use and service occupation taxes on qualifying equipment and building materials (not electricity) for up to 20 years, in renewable five-year certificates, if owner/operator and tenants invest at least $250 million over 60 months, create at least 20 full-time jobs paying at least 120% of the county median wage, and are carbon neutral or green-building certified; by statute no new certificates may be issued after July 1, 2029, and DCEO stopped processing new applications on July 1, 2026 at the Governor's direction.

Recent change: Gov. Pritzker directed DCEO on June 5, 2026 to pause new data center agreements effective July 1, 2026 pending legislation on utility costs; agreements made before July 1, 2026 are honored.

Source: Illinois Department of Commerce and Economic Opportunity, accessed 2026-10-17. General information, not tax advice; ask your tax advisor.

AI data centers being built in Illinois

CampusDeveloperCountyMWStatusSource
Joliet Technology CenterPowerHouse Data Centers and Hillwood (PowerHouse Hillwood HoWill County1,800announcedCity of JolietMar 19, 2026
T5@Chicago IV (Grayslake)T5 Data CentersLake County1,550announcedBlackridge ResearchSep 20, 2026
Meta DeKalb data center campusMetaDeKalb County-operatingOffice of the Governor of IllinoisNov 29, 2023

Busiest points of interconnection in Illinois

#Point of interconnectionCountyISORequestsQueued MWMostly
1Nelson-Electric Junction 345 kVLee County, ILPJM113,200Storage
2Byron - Wayne 345 kVOgle County, ILPJM62,400Storage
3Nelson-Electric Junction 345kVLee County, ILPJM22,400Storage
4Elwood 345 kVWill County, ILPJM21,650Gas
57FARGO - 7SANDBURG 345.0kVPeoria County, ILMISO31,000Wind

How the score works

Six parts out of 100: transmission (25), generation in the queue (20), the state's industrial power price (20), existing and retiring plants (15), sales tax exemption (10) and data center activity (10). The site finder's methodology prints each formula and every source with its date. Markets: MISO (Midwest and South), PJM (Mid-Atlantic and Midwest), Utility territory (no ISO/RTO).

All states

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