Datacenter Sites in Calhoun County, Illinois
Calhoun County has 7 scored datacenter candidate sites averaging 51.7/100 DC Readiness, with a catalogued aggregate of 550 MW. FEMA rates local natural-hazard risk as "Relatively High". The county has a datacenter tax incentive on record.
At a glance
Calhoun County, Illinois has 7 scored datacenter candidate sites averaging 51.7/100 DC Readiness, roughly in line with the Illinois average of 53.6. It ranks 85th of 101 Illinois counties by number of sites and 93rd by average score. The top-scoring site is Substation-Adjacent site · 0f2431fe at 56.8/100.
Site-selection context for Calhoun County
Incentive detail: Enterprise Zone sales tax exemption; High Impact Business designation for $12M+ DC investments.
How does Calhoun County compare with other counties in Illinois?
By number of scored sites, Calhoun County ranks 85th of the 101 Illinois counties with a county page, holding 0.2% of the state's 3,641 sites. Its average DC Readiness of 51.7/100 ranks 93rd in the state and is roughly in line with the national average of 53.0. Nationally it has the 2670th-largest site inventory of 2,964 counties with five or more sites. 0 sites score 70 or higher and 2 score 55 or higher.
What types of datacenter sites are in Calhoun County?
Greenfield sites are the most common (5, 71% of the county's inventory), followed by substation-adjacent (2). Site type reflects how the parcel was identified — next to a substation, on a former mine or brownfield, on industrial or federal excess land — and is scored on the same 14 factors either way.
What are power cost, hazard, water and fiber conditions in Calhoun County?
Industrial electricity averages 3.10¢/kWh and commercial 8.67¢/kWh. FEMA's National Risk Index rates the county "Relatively High" (35). WRI water stress is low. 1 fiber providers report service in the county. The climate runs 1,100 cooling degree days a year with a mean temperature of 52°F. Land is valued around $5,497 an acre.
By site type
Top datacenter sites in Calhoun County
| Site | Type | Voltage | Capacity | Queue wait | Score |
|---|---|---|---|---|---|
| UNKNOWN122778 | Substation-Adjacent | 138 kV | 100 MW | 4.8 yrs | 56.8 |
| EC Coal Calhoun County | Greenfield | — | — | 4.8 yrs | 55.0 |
| KAMPSVILLE | Substation-Adjacent | 69 kV | 50 MW | 4.8 yrs | 53.0 |
| Greenfield (UNKNOWN122091 - UNKNOWN122778) | Greenfield | 138 kV | 100 MW | 4.8 yrs | 49.4 |
| Greenfield (UNKNOWN122091 - UNKNOWN122778) | Greenfield | 138 kV | 100 MW | 4.8 yrs | 49.4 |
| Greenfield (UNKNOWN122091 - UNKNOWN122778) | Greenfield | 138 kV | 100 MW | 4.8 yrs | 49.4 |
| Greenfield (UNKNOWN122091 - UNKNOWN122778) | Greenfield | 138 kV | 100 MW | 4.8 yrs | 49.2 |
Every scored site in Calhoun County
All 7 sites, best first.
- Substation-Adjacent site · 0f2431fe · 56.8
- EC Coal Calhoun County · 55.0
- KAMPSVILLE · 53.0
- Greenfield (UNKNOWN122091 - UNKNOWN122778) · af4b4198 · 49.4
- Greenfield (UNKNOWN122091 - UNKNOWN122778) · 3dee1b36 · 49.4
- Greenfield (UNKNOWN122091 - UNKNOWN122778) · 72b585ea · 49.4
- Greenfield (UNKNOWN122091 - UNKNOWN122778) · e9131a29 · 49.2
Calhoun County datacenter FAQ
How many datacenter sites are in Calhoun County?
7 scored datacenter candidate sites, averaging 51.7/100 DC Readiness. That is the 85th-most of 101 Illinois counties with five or more sites.
What is the highest-scoring datacenter site in Calhoun County?
Substation-Adjacent site · 0f2431fe scores 56.8/100 DC Readiness, the highest of the 7 scored sites in Calhoun County (a substation-adjacent site).
Does Calhoun County offer datacenter tax incentives?
Enterprise Zone sales tax exemption; High Impact Business designation for $12M+ DC investments.
What is the natural-hazard risk in Calhoun County?
FEMA's National Risk Index rates Calhoun County as "Relatively High" (score 35).
What are industrial electricity rates in Calhoun County?
Average industrial electricity is 3.10¢/kWh and commercial is 8.67¢/kWh in Calhoun County.
More in Illinois
- All datacenter sites in Illinois· 3,641 sites
- Operating datacenters in Illinois
- Electric substations in Illinois
- Cook County· 745 sites · avg 53.1
- Winnebago County· 193 sites · avg 51.1
- Stephenson County· 127 sites · avg 47.8
- Madison County· 112 sites · avg 55.9
- St. Clair County· 100 sites · avg 54.4
- Lake· 89 sites · avg 54.8
- Greenfield sites in Illinois
- Substation-Adjacent sites in Illinois
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 Calhoun County, Illinois”, https://gridcensus.com/datacenter-sites/illinois/calhoun-county (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 Calhoun County, Illinois 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.