How many datacenter sites are in Illinois?

GridCensus catalogs 3,641 scored datacenter candidate sites in Illinois, with an average DC Readiness score of 56.0/100.

What is the average interconnection-queue wait in Illinois?

Candidate sites in Illinois average a 4.0 yrs interconnection-queue wait, with an average queue depth of 389 projects.

What kind of datacenter sites are most common in Illinois?

Industrial sites are the most common category in Illinois (1,441 sites), and most sites fall within the PJM grid region.

Datacenter Sites in Illinois

Illinois has 3,641 scored datacenter candidate sites averaging 56.0/100 DC Readiness. Industrial parcels lead the inventory (1,441 sites). Most sites interconnect through PJM. The state's candidate sites carry a catalogued aggregate of 166.4k MW and average a 4.0 yrs interconnection-queue wait.

3,641

Candidate sites

56.0/100

Avg DC Readiness

166.4k MW

Catalogued capacity

theoretical aggregate

4.0 yrs

Avg queue wait

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≥ 7560–7540–60≤ 40

Top 25 in Illinois

By site type

By grid region

PJM
3,592
MISO
38
CAISO
4
WECC
3
SERC
2
SPP
1

Average sub-score profile

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

Power availability

36.9

Speed-to-power

48.2

Fiber

70.6

Water

87.4

Hazard resilience

63.3

Top 25 datacenter sites in Illinois

Ranked by DC Readiness.

Top datacenter sites in Illinois
Site	Type	County	Voltage	Capacity	Queue wait	Score
UNKNOWN122269	Substation-Adjacent	Cook County	345 kV	600 MW	3.8 yrs	71.9
UNKNOWN121936	Substation-Adjacent	Kenosha County	345 kV	600 MW	3.8 yrs	71.8
UNKNOWN124436	Substation-Adjacent	Cook County	345 kV	600 MW	3.8 yrs	71.1
PLANO (765 KV)	Substation-Adjacent	Kendall County	765 kV	1,000 MW	3.8 yrs	70.4
UNKNOWN122285	Substation-Adjacent	Cook County	345 kV	600 MW	3.8 yrs	69.6
UNKNOWN133790	Substation-Adjacent	Lake County	345 kV	600 MW	3.8 yrs	69.4
CAHOKIA	Substation-Adjacent	St. Louis city	345 kV	600 MW	3.8 yrs	69.2
SUB 39	Substation-Adjacent	Rock Island County	345 kV	600 MW	3.8 yrs	69.1
ZION	Substation-Adjacent	Kenosha County	345 kV	600 MW	3.8 yrs	68.8
QUAD CITIES	Substation-Adjacent	Clinton County	345 kV	600 MW	3.8 yrs	68.7
ELECTRIC LIGHT 345 KV	Substation-Adjacent	DuPage County	345 kV	600 MW	3.8 yrs	68.6
ELMHURST	Substation-Adjacent	DuPage County	345 kV	600 MW	3.8 yrs	68.6
UNKNOWN122188	Substation-Adjacent	Clinton County	345 kV	600 MW	3.8 yrs	68.6
UNKNOWN124699	Substation-Adjacent	Cook County	345 kV	600 MW	3.8 yrs	68.6
ITASCA	Substation-Adjacent	DuPage County	345 kV	600 MW	3.8 yrs	68.5
UNKNOWN122226	Substation-Adjacent	DuPage County	345 kV	600 MW	3.8 yrs	68.5
TAP138235	Substation-Adjacent	DuPage County	345 kV	600 MW	3.8 yrs	68.5
FARGO 345 KV	Substation-Adjacent	Peoria County	345 kV	600 MW	3.8 yrs	68.5
OAK GROVE	Substation-Adjacent	Rock Island County	345 kV	600 MW	3.8 yrs	68.5
RISER159741	Substation-Adjacent	Tazewell County	345 kV	600 MW	3.8 yrs	68.5
LISLE	Substation-Adjacent	DuPage County	345 kV	600 MW	3.8 yrs	68.5
UNKNOWN122221	Substation-Adjacent	DuPage County	345 kV	600 MW	3.8 yrs	68.4
UNKNOWN122220	Substation-Adjacent	DuPage County	345 kV	600 MW	3.8 yrs	68.4
TAP138253	Substation-Adjacent	DuPage County	345 kV	600 MW	3.8 yrs	68.4
TAP139481	Substation-Adjacent	St. Louis city	345 kV	600 MW	3.8 yrs	68.2

Counties in Illinois

101 counties with five or more scored sites.

Cook County745 · 56.4 Winnebago County193 · 54.4 Stephenson County127 · 51.1 Madison County112 · 57.5 St. Clair County100 · 56.2 Lake89 · 57.9 Vermilion County88 · 53.7 LaSalle87 · 53.5 Will82 · 58.7 Sangamon County72 · 54.9 Macon County71 · 53.6 Rock Island County68 · 59.5 DuPage67 · 63.4 Williamson County60 · 55.4 Peoria County58 · 59.8 Ogle County57 · 58.1 Saline County56 · 55.3 Kankakee County48 · 53.8 Randolph County47 · 55.8 Tazewell County47 · 60.1 Champaign44 · 59.6 Fulton County43 · 55.4 Kane County42 · 59.8 Perry County37 · 53.1 White37 · 54.8 Pike County35 · 54.7 Whiteside County35 · 55.5 Franklin County34 · 56.2 Jackson34 · 55.1 McHenry County33 · 56.9 Knox County29 · 56.9 Clinton County25 · 55.7 McLean County25 · 58.1 Fayette County24 · 53.9 Gallatin County24 · 53.3 Grundy23 · 57.8 Hancock County22 · 53.2 Lee County22 · 55.6 Boone County21 · 55.5 Edwards County21 · 55.2 Monroe County21 · 56.5 Putnam County21 · 56.0 Christian20 · 57.5 Mason19 · 56.7 Richland County19 · 54.4 Jasper County18 · 55.6 Morgan County18 · 56.4 McDonough County17 · 54.0 Montgomery County17 · 56.1 Crawford County16 · 55.0 Jefferson County16 · 55.1 Wayne County16 · 56.4 DeKalb County15 · 60.7 Jo Daviess County15 · 55.5 Warren County15 · 51.8 Adams County14 · 56.2 De Witt County14 · 58.1 Hamilton County14 · 56.4 Livingston County14 · 55.5 Pope County14 · 55.8 Moultrie13 · 56.3 Bond County12 · 56.0 Clark County12 · 55.5 Coles County12 · 56.5 Hardin County12 · 54.3 Kendall County12 · 60.6 Logan County12 · 57.7 Scott County12 · 56.0 Washington County12 · 57.3 Bureau County11 · 55.2 Clay County11 · 56.7 Marshall County11 · 57.3 Woodford County11 · 58.5 Carroll10 · 54.9 Douglas County10 · 58.7 Effingham County10 · 55.0 Wabash County10 · 56.4 Edgar County9 · 57.8 Ford County9 · 56.2 Macoupin9 · 56.6 Greene County8 · 57.0 Jersey County8 · 55.7 Pulaski County8 · 54.9 Schuyler County8 · 54.5 Calhoun County7 · 53.6 Henry County7 · 59.2 Iroquois County7 · 56.6 Lawrence County7 · 53.6 Marion County7 · 56.3 Massac County7 · 60.7 Alexander County6 · 51.0 Cumberland6 · 58.5 Johnson County6 · 58.4 Shelby County6 · 55.6 Cass5 · 56.8 Henderson County5 · 55.4 Menard County5 · 57.6 Mercer County5 · 55.5 Piatt County5 · 56.8 Stark County5 · 56.7 Union County5 · 55.0

Illinois datacenter site selection FAQ

How many datacenter sites are in Illinois?: GridCensus catalogs 3,641 scored datacenter candidate sites in Illinois, with an average DC Readiness score of 56.0/100.
What is the average interconnection-queue wait in Illinois?: Candidate sites in Illinois average a 4.0 yrs interconnection-queue wait, with an average queue depth of 389 projects.
What kind of datacenter sites are most common in Illinois?: Industrial sites are the most common category in Illinois (1,441 sites), and most sites fall within the PJM grid region.

Dataset updated September 2026. Screening estimates derived from public data sources.

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This page shows a public slice of the GridCensus dataset for Illinois. Pro and Enterprise plans unlock the full 164,098-site catalog, raw sub-scores, parcel ownership, interconnection-queue detail, saved searches, and programmatic API access.

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