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Datacenter Sites in Marion County, Iowa

Marion County has 30 scored datacenter candidate sites averaging 54.6/100 DC Readiness, with a catalogued aggregate of 550 MW. FEMA rates local natural-hazard risk as "Relatively Moderate". The county has a datacenter tax incentive on record.

At a glance

Marion County, Iowa has 30 scored datacenter candidate sites averaging 54.6/100 DC Readiness, roughly in line with the Iowa average of 56.3. It ranks 24th of 85 Iowa counties by number of sites and 62nd by average score. The top-scoring site is EC Near Pella · 151ba2d4 at 58.7/100.

30
Candidate sites
54.6/100
Avg DC Readiness
550 MW
Catalogued capacity
theoretical aggregate
Relatively Moderate
Hazard rating
◆ Loading map…
≥ 7560–7540–60≤ 40
Top 25 in Marion County

Site-selection context for Marion County

Yessales_tax_exemption
Datacenter tax incentive
8.82¢/kWh
Commercial electricity
6.21¢/kWh
Industrial electricity
8
Fiber providers
Low
Water stress
$7,647
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 Marion County compare with other counties in Iowa?

By number of scored sites, Marion County ranks 24th of the 85 Iowa counties with a county page, holding 1.2% of the state's 2,572 sites. Its average DC Readiness of 54.6/100 ranks 62nd in the state and is roughly in line with the national average of 53.0. Nationally it has the 1271st-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 Marion County?

Greenfield sites are the most common (13, 43% of the county's inventory), followed by substation-adjacent (11) and former mine (6). 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 Marion County?

Industrial electricity averages 6.21¢/kWh and commercial 8.82¢/kWh. FEMA's National Risk Index rates the county "Relatively Moderate" (30). WRI water stress is low. 8 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 $7,647 an acre.

By site type

Top datacenter sites in Marion County

Top datacenter sites in Marion County
SiteTypeVoltageCapacityQueue waitScore
EC Near PellaGreenfield——4.3 yrs58.7
EC Coal Marion CountyGreenfield——4.3 yrs58.0
EC Near PellaGreenfield——4.3 yrs57.9
EC Near PellaGreenfield——4.3 yrs57.4
EC Near PellaGreenfield——4.3 yrs57.3
EC Near PellaGreenfield——4.3 yrs57.0
UNKNOWN132641Substation-Adjacent69 kV50 MW4.3 yrs56.5
EC Near PellaGreenfield——4.3 yrs56.5
EC Near PellaGreenfield——4.3 yrs56.0
TAP159170Substation-Adjacent69 kV50 MW4.3 yrs55.9
UNKNOWN137742Substation-Adjacent69 kV50 MW4.3 yrs55.8
UNKNOWN133184Substation-Adjacent69 kV50 MW4.3 yrs55.7
EC Near PellaGreenfield——4.3 yrs55.6
EC Near PellaGreenfield——4.3 yrs55.5
UNKNOWN132642Substation-Adjacent69 kV50 MW4.3 yrs54.8
TAP159167Substation-Adjacent69 kV50 MW4.3 yrs54.8
UNKNOWN133173Substation-Adjacent69 kV50 MW4.3 yrs54.8
RISER160041Substation-Adjacent69 kV50 MW4.3 yrs54.5
UNKNOWN160036Substation-Adjacent69 kV50 MW4.3 yrs54.4
RISER160039Substation-Adjacent69 kV50 MW4.3 yrs54.4
TAP160046Substation-Adjacent69 kV50 MW4.3 yrs54.4
EC Near PellaGreenfield——4.3 yrs53.4
EC Near PellaGreenfield——4.3 yrs52.1
EC Near PellaGreenfield——4.3 yrs51.9
Mine SiteFormer Mine——4.3 yrs51.8

Every scored site in Marion County

All 30 sites, best first.

Marion County datacenter FAQ

How many datacenter sites are in Marion County?

30 scored datacenter candidate sites, averaging 54.6/100 DC Readiness. That is the 24th-most of 85 Iowa counties with five or more sites.

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

EC Near Pella · 151ba2d4 scores 58.7/100 DC Readiness, the highest of the 30 scored sites in Marion County (a greenfield site).

Does Marion 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 Marion County?

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

What are industrial electricity rates in Marion County?

Average industrial electricity is 6.21¢/kWh and commercial is 8.82¢/kWh in Marion 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 13, 2026 — GridCensus refreshes it monthly. See the methodology for how records are matched, cleaned and scored.

Cite as: GridCensus, “Datacenter candidate sites in Marion County, Iowa”, https://gridcensus.com/datacenter-sites/iowa/marion-county (data as of November 13, 2026).

Dataset updated . Screening estimates derived from public data sources.

Go deeper than the public screen

Every site and score for Marion 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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