Federal Excess Datacenter Sites in Illinois
At a glance
Surplus federal property released for civilian reuse. Federal excess parcels can carry existing infrastructure and favorable disposition terms, but acquisition timelines vary with the disposing agency.
Top federal excess sites in Illinois
| Site | Type | County | Voltage | Capacity | Queue wait | Score |
|---|---|---|---|---|---|---|
| NATL CTR AGR UTILIZATION RES | Federal Excess | Peoria County | — | — | 4.8 yrs | 55.4 |
| Rock Island National Cemetery | Federal Excess | Rock Island County | — | — | 4.8 yrs | 55.1 |
| Rock Island National Cemetery | Federal Excess | Rock Island County | — | — | 4.8 yrs | 55.1 |
| Rock Island National Cemetery | Federal Excess | Rock Island County | — | — | 4.8 yrs | 55.0 |
| Rock Island National Cemetery | Federal Excess | Rock Island County | — | — | 4.8 yrs | 55.0 |
| PEKIN FCI | Federal Excess | Tazewell County | — | — | 4.8 yrs | 54.5 |
| GREATER PEORIA AIRPORT | Federal Excess | Peoria County | — | — | 4.8 yrs | 54.5 |
| QUAD CITY INTERNATIONAL AIRPORT | Federal Excess | Rock Island County | — | — | 4.8 yrs | 54.4 |
| PEORIA ILLINOIS | Federal Excess | Peoria County | — | — | 4.8 yrs | 54.4 |
| MIDWAY INTERNATIONAL AIRPORT | Federal Excess | Cook County | — | — | 4.8 yrs | 53.5 |
| OHARE CHICAGO ILLINOIS | Federal Excess | Cook County | — | — | 4.8 yrs | 53.4 |
| AURORA ILLINOIS | Federal Excess | Kane County | — | — | 4.8 yrs | 53.1 |
| PAUL SIMON | Federal Excess | Cook County | — | — | 4.8 yrs | 53.0 |
| Jesse BrownVA Medical Center,Chicago IL | Federal Excess | Cook County | — | — | 4.8 yrs | 52.8 |
| PALWAUKEE AIRPORT-WHEELING | Federal Excess | Cook County | — | — | 4.8 yrs | 52.8 |
| Edward Hines, Jr. VA Hospital | Federal Excess | Cook County | — | — | 4.8 yrs | 52.5 |
| VORTAC RESTRICTIVE EASEMENT TROY, IL | Federal Excess | Madison County | — | — | 4.8 yrs | 52.5 |
| TROY ILLINOIS | Federal Excess | Madison County | — | — | 4.8 yrs | 52.4 |
| WILLARD AIRPORT | Federal Excess | Champaign County | — | — | 4.8 yrs | 52.3 |
| TROY ILLINOIS | Federal Excess | Madison County | — | — | 4.8 yrs | 52.3 |
| CHICAGO/DUPAGE/GENEVA ILL | Federal Excess | Kane County | — | — | 4.8 yrs | 52.3 |
| CHICAGO/DUPAGE/GENEVA ILL | Federal Excess | Kane County | — | — | 4.8 yrs | 52.3 |
| AURORA MUNICIPAL AIRPORT | Federal Excess | Kane County | — | — | 4.8 yrs | 52.3 |
| CHICAGO/DUPAGE/GENEVA ILL | Federal Excess | Kane County | — | — | 4.8 yrs | 52.3 |
| ST. LOUIS REGIONAL AIRPORT | Federal Excess | Madison County | — | — | 4.8 yrs | 52.0 |
How does Illinois compare with other states for federal excess sites?
With 89 sites, Illinois ranks 18th of the 35 states that have any federal excess candidate sites. Washington leads with 3,676. Nationally, federal excess sites average 47.5/100 DC Readiness, below the 53.0 average across all site types. Across every site type, Illinois averages 53.6, the 26th-highest of 52 states, and its candidate sites face an average interconnection-queue wait of 4.8 years.
Where are the highest-scoring federal excess sites in Illinois?
The top 25 range from 55.4 to 52.0 on the 0–100 DC Readiness Score. They are concentrated in Cook County (6), Rock Island County (5), Kane County (5) and Madison County (4). By grid region, 14 are in MISO and 11 are in PJM.
County pages: Cook County · Rock Island County · Kane County · Madison County
What power, fiber and flood exposure do these federal excess sites have?
Their counties have a median of 12 fixed fiber broadband providers in FCC data. The median distance to the nearest internet exchange facility is 9 km. The median interconnection-queue wait in their markets is 4.8 years. None of the 5 with a mapped FEMA flood zone sits in a high-risk (A or V) zone. 6 lie within 25 km of a binding transmission constraint.
Frequently asked questions
How many federal excess datacenter sites are in Illinois?
GridCensus catalogs 89 federal excess datacenter candidate sites in Illinois, 0.5% of the national total for this type (18th of 35 states).
What is a federal excess datacenter site?
Surplus federal property released for civilian reuse. Federal excess parcels can carry existing infrastructure and favorable disposition terms, but acquisition timelines vary with the disposing agency.
What is the best federal excess datacenter site in Illinois?
By DC Readiness Score, NATL CTR AGR UTILIZATION RES in Peoria County ranks first at 55.4/100, followed by Rock Island National Cemetery in Rock Island County at 55.1.
Which Illinois counties have the best federal excess sites?
The top 25 federal excess sites in Illinois are concentrated in Cook County (6), Rock Island County (5), Kane County (5) and Madison County (4).
How does Illinois score for datacenters overall?
All 3,641 scored sites in Illinois average 53.6/100 DC Readiness, the 26th-highest of 52 states, against a national average of 53.0.
More on federal excess sites and Illinois
- All datacenter sites in Illinois· 3,641 sites
- Federal Excess datacenter sites nationwide· 17,528 sites
- Industrial sites in Illinois· 1,441 sites
- Greenfield sites in Illinois· 913 sites
- Substation-Adjacent sites in Illinois· 795 sites
- Former Mine sites in Illinois· 368 sites
- Brownfield sites in Illinois· 33 sites
Federal Excess sites in other states
- Federal Excess sites in Washington· 3,676 sites
- Federal Excess sites in California· 3,212 sites
- Federal Excess sites in Arizona· 1,616 sites
- Federal Excess sites in Nebraska· 1,057 sites
- Federal Excess sites in Oklahoma· 991 sites
- Federal Excess sites in Utah· 930 sites
- Federal Excess sites in Idaho· 922 sites
- Federal Excess sites in Colorado· 911 sites
Dataset updated . Screening estimates derived from public data sources.
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, “Federal Excess datacenter sites in Illinois”, https://gridcensus.com/site-types/federal-excess/illinois (data as of November 12, 2026).
Go deeper than the public screen
Every site and score for Federal Excess sites in 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.