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Datacenter Sites in Winnebago County, Iowa

Winnebago County has 26 scored datacenter candidate sites averaging 58.6/100 DC Readiness, with a catalogued aggregate of 620 MW. FEMA rates local natural-hazard risk as "Relatively Moderate". The county has a datacenter tax incentive on record.

At a glance

Winnebago County, Iowa has 26 scored datacenter candidate sites averaging 58.6/100 DC Readiness, roughly in line with the Iowa average of 56.3. It ranks 27th of 85 Iowa counties by number of sites and 13th by average score. The top-scoring site is EC Near Lake Mills · 68dd6313 at 63.7/100.

26
Candidate sites
58.6/100
Avg DC Readiness
620 MW
Catalogued capacity
theoretical aggregate
Relatively Moderate
Hazard rating
◆ Loading map…
≥ 7560–7540–60≤ 40
Top 25 in Winnebago County

Site-selection context for Winnebago County

Yessales_tax_exemption
Datacenter tax incentive
12.02¢/kWh
Commercial electricity
7.59¢/kWh
Industrial electricity
6
Fiber providers
Low
Water stress
$9,707
Land price / acre
900
Cooling degree days
6,500
Heating degree days
48°F
Mean annual temp

Incentive detail: Sales tax exemption on DC equipment for $1M+ investments; property tax phase-in for new construction.

How does Winnebago County compare with other counties in Iowa?

By number of scored sites, Winnebago County ranks 27th of the 85 Iowa counties with a county page, holding 1.0% of the state's 2,572 sites. Its average DC Readiness of 58.6/100 ranks 13th in the state and is about 11% above the national average of 53.0. Nationally it has the 1422nd-largest site inventory of 2,964 counties with five or more sites. 0 sites score 70 or higher and 24 score 55 or higher.

What types of datacenter sites are in Winnebago County?

Greenfield sites are the most common (12, 46% of the county's inventory), followed by substation-adjacent (12) and shovel-ready (1). 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 Winnebago County?

Industrial electricity averages 7.59¢/kWh and commercial 12.02¢/kWh. FEMA's National Risk Index rates the county "Relatively Moderate" (30). WRI water stress is low. 6 fiber providers report service in the county. The climate runs 900 cooling degree days a year with a mean temperature of 48°F. Land is valued around $9,707 an acre.

By site type

Top datacenter sites in Winnebago County

Top datacenter sites in Winnebago County
SiteTypeVoltageCapacityQueue waitScore
EC Near Lake MillsGreenfield——4.3 yrs63.7
EC Near Lake MillsGreenfield——4.3 yrs62.6
EC Near Lake MillsGreenfield——4.3 yrs62.1
EC Near Lake MillsGreenfield——4.3 yrs62.1
EC Near Lake MillsGreenfield——4.3 yrs61.8
EC Near Lake MillsGreenfield——4.3 yrs61.3
EC Near Lake MillsGreenfield——4.3 yrs60.7
EC Near Lake MillsGreenfield——4.3 yrs60.4
EC Near Lake MillsGreenfield——4.3 yrs60.2
EC Near Lake MillsGreenfield——4.3 yrs60.1
EC Near Lake MillsGreenfield——4.3 yrs59.1
TAP162846Substation-Adjacent69 kV50 MW4.3 yrs58.2
TAP162845Substation-Adjacent69 kV50 MW4.3 yrs58.2
UNKNOWN163605Substation-Adjacent69 kV50 MW4.3 yrs57.9
TAP163603Substation-Adjacent69 kV50 MW4.3 yrs57.8
TAP162843Substation-Adjacent69 kV50 MW4.3 yrs57.8
TAP163607Substation-Adjacent69 kV50 MW4.3 yrs57.6
TAP163604Substation-Adjacent69 kV50 MW4.3 yrs57.5
TAP162847Substation-Adjacent69 kV50 MW4.3 yrs56.8
TAP162849Substation-Adjacent69 kV50 MW4.3 yrs56.7
TAP162841Substation-Adjacent69 kV50 MW4.3 yrs56.7
TAP162848Substation-Adjacent69 kV50 MW4.3 yrs56.7
EC Near Lake MillsGreenfield——4.3 yrs56.6
UNKNOWN133773Substation-Adjacent69 kV50 MW4.3 yrs55.5
Rake Community School BuildingIndustrial——4.3 yrs53.1

Every scored site in Winnebago County

All 26 sites, best first.

Winnebago County datacenter FAQ

How many datacenter sites are in Winnebago County?

26 scored datacenter candidate sites, averaging 58.6/100 DC Readiness. That is the 27th-most of 85 Iowa counties with five or more sites.

What is the highest-scoring datacenter site in Winnebago County?

EC Near Lake Mills · 68dd6313 scores 63.7/100 DC Readiness, the highest of the 26 scored sites in Winnebago County (a greenfield site).

Does Winnebago County offer datacenter tax incentives?

Sales tax exemption on DC equipment for $1M+ investments; property tax phase-in for new construction.

What is the natural-hazard risk in Winnebago County?

FEMA's National Risk Index rates Winnebago County as "Relatively Moderate" (score 30).

What are industrial electricity rates in Winnebago County?

Average industrial electricity is 7.59¢/kWh and commercial is 12.02¢/kWh in Winnebago County.

More in Iowa

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 Winnebago County, Iowa”, https://gridcensus.com/datacenter-sites/iowa/winnebago-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 Winnebago County, Iowa 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.

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