Datacenter Sites in Mason, Illinois
Mason has 19 scored datacenter candidate sites averaging 55.4/100 DC Readiness, with a catalogued aggregate of 300 MW. FEMA rates local natural-hazard risk as "Relatively High". The county has a datacenter tax incentive on record.
At a glance
Mason, Illinois has 19 scored datacenter candidate sites averaging 55.4/100 DC Readiness, roughly in line with the Illinois average of 53.6. It ranks 44th of 101 Illinois counties by number of sites and 27th by average score. The top-scoring site is HAVANA at 61.1/100.
Site-selection context for Mason
Incentive detail: Enterprise Zone sales tax exemption; High Impact Business designation for $12M+ DC investments.
How does Mason compare with other counties in Illinois?
By number of scored sites, Mason ranks 44th of the 101 Illinois counties with a county page, holding 0.5% of the state's 3,641 sites. Its average DC Readiness of 55.4/100 ranks 27th in the state and is roughly in line with the national average of 53.0. Nationally it has the 1783rd-largest site inventory of 2,964 counties with five or more sites. 0 sites score 70 or higher and 14 score 55 or higher.
What types of datacenter sites are in Mason?
Greenfield sites are the most common (14, 74% of the county's inventory), followed by substation-adjacent (3) and industrial (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 Mason?
Industrial electricity averages 8.62¢/kWh and commercial 10.88¢/kWh. FEMA's National Risk Index rates the county "Relatively High" (35). WRI water stress is low. 3 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 $8,722 an acre.
By site type
Top datacenter sites in Mason
| Site | Type | Voltage | Capacity | Queue wait | Score |
|---|---|---|---|---|---|
| HAVANA | Substation-Adjacent | 138 kV | 100 MW | 4.8 yrs | 61.1 |
| EC Coal Mason County | Greenfield | — | — | 4.8 yrs | 57.8 |
| EC Coal Mason County | Greenfield | — | — | 4.8 yrs | 57.5 |
| HAVANA S | Substation-Adjacent | 138 kV | 100 MW | 4.8 yrs | 56.8 |
| EC FFE Mason County | Greenfield | — | — | 4.8 yrs | 56.7 |
| EC Near Havana | Greenfield | — | — | 4.8 yrs | 56.7 |
| EC Coal Mason County | Greenfield | — | — | 4.8 yrs | 56.4 |
| MASON CITY WEST | Substation-Adjacent | 138 kV | 100 MW | 4.8 yrs | 56.4 |
| EC Near Havana | Greenfield | — | — | 4.8 yrs | 56.4 |
| EC Near Havana | Greenfield | — | — | 4.8 yrs | 55.9 |
| EC Near Havana | Greenfield | — | — | 4.8 yrs | 55.9 |
| EC Near Havana | Greenfield | — | — | 4.8 yrs | 55.4 |
| EC Near Havana | Greenfield | — | — | 4.8 yrs | 55.1 |
| EC Near Havana | Greenfield | — | — | 4.8 yrs | 55.0 |
| EC Near Havana | Greenfield | — | — | 4.8 yrs | 52.9 |
| EC Near Havana | Greenfield | — | — | 4.8 yrs | 52.8 |
| EC Near Havana | Greenfield | — | — | 4.8 yrs | 51.7 |
| Forest City High School | Industrial | — | — | 4.8 yrs | 51.4 |
| Former Prairieland Steel | Industrial | — | — | 4.8 yrs | 50.5 |
Every scored site in Mason
All 19 sites, best first.
- HAVANA · 61.1
- EC Coal Mason County · 6dab8b10 · 57.8
- EC Coal Mason County · fc87566c · 57.5
- HAVANA S · 56.8
- EC FFE Mason County · 56.7
- EC Near Havana · 14423a09 · 56.7
- EC Coal Mason County · 875097e7 · 56.4
- MASON CITY WEST · 56.4
- EC Near Havana · 0e55a848 · 56.4
- EC Near Havana · 000b23ed · 55.9
- EC Near Havana · 1c41e969 · 55.9
- EC Near Havana · 73320a7d · 55.4
- EC Near Havana · 27e1ec01 · 55.1
- EC Near Havana · c056e2d9 · 55.0
- EC Near Havana · 913bed10 · 52.9
- EC Near Havana · c2b17b5a · 52.8
- EC Near Havana · 3eae5acd · 51.7
- Forest City High School · 51.4
- Former Prairieland Steel · 50.5
Mason datacenter FAQ
How many datacenter sites are in Mason?
19 scored datacenter candidate sites, averaging 55.4/100 DC Readiness. That is the 44th-most of 101 Illinois counties with five or more sites.
What is the highest-scoring datacenter site in Mason?
HAVANA scores 61.1/100 DC Readiness, the highest of the 19 scored sites in Mason (a substation-adjacent site).
Does Mason offer datacenter tax incentives?
Enterprise Zone sales tax exemption; High Impact Business designation for $12M+ DC investments.
What is the natural-hazard risk in Mason?
FEMA's National Risk Index rates Mason as "Relatively High" (score 35).
What are industrial electricity rates in Mason?
Average industrial electricity is 8.62¢/kWh and commercial is 10.88¢/kWh in Mason.
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 Mason, Illinois”, https://gridcensus.com/datacenter-sites/illinois/mason (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 Mason, 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.