FieldProspects

Marion County, Iowa

Marion County, Iowa has 25 power projects in the FieldProspects database, all of them operating, 100.3 MW in total, with nothing in the queue. No data center record lists the county. Hydro leads with 55.2 MW across 2 projects. Data as of October 8, 2026.

Data as of Grid region: Midcontinent ISO (MISO)Refreshed monthly
25
power projects, planned and operating
0MW
planned generation, 0 projects
100.3MW
operating generation, 25 projects
0
planned projects past their listed in-service date
Map

Marion County and its neighbors

Counties shaded by data center MW on record, planned to operating. 2 of its 6 neighboring counties have pages of their own. The rest are in the member database.

Warren 285 MW Mahaska Marion no data centers Polk 1.1 GW Jasper Lucas Monroe
no data center MWunder 100 MW100 to 1,000 MW1,000 to 5,000 MW5,000 to 15,000 MW15,000 MW or more no page yet

Data center records planned, under construction and operating, data as of October 8, 2026.Hover a county for its numbers

Headline finding
100.3MW

of operating generation across 25 plants, and nothing in the interconnection queue for Marion County.

Operating generation100.3 MW
Planned generation0 MW

Technology mix

25 projects, 100.3 MW planned and operating

Hydro55.2 MW2 projects, 55%
Oil44 MW22 projects, 44%
Battery Storage1.1 MW1 project, 1%
Which companies own these 25 projects?Project names, developers and contacts are for members.See what members get

Power generation in the county

25 plants operate inside Marion County, 100.3 MW. Nothing is in the queue for the county.

Figure 1

Operating and planned generation by technology

MW in Marion County

OperatingPlanned
HydroOperating 55.2 MW 2 projects
OilOperating 44 MW 22 projects
Battery StorageOperating 1.1 MW 1 project
View as table
TechnologyStatusProjectsMW
HydroOperating255.2
OilOperating2244
Battery StorageOperating11.1
Operating: 100.3 MW. Planned: 0 MW. Nothing is in the queue to add to it.
Source. FieldProspects database: ISO/RTO interconnection queues, EIA-860M and public data center filings, data as of October 8, 2026.

Marion County against its neighbors

Polk County has the most data center MW among the neighbors, 1.1 GW. None of the neighbors has more generation operating than data center MW on record.

CountyData center recordsData center MWOperating generation MWPlanned generation MWData center MW per MW operating
Polk County 27
1,074
1,066
340 1x
Warren County 5
285
44
0 6.4x
Marion County this page 0
0
100
0 0x

Data center MW counts records planned, under construction and operating. Generation is inside the county only. Neighbors without a page have fewer than three projects on record.

3 counties shown

Every record in Marion County

Project name, developer, status, MW, in-service year and the developer’s contacts, for all 25 records. Filter, sort and export to Excel.

Members only
County: Marion County, IAStatus: all except cancelledSort: MW, largest first 25 records
Project or campusDeveloperStatusMWYearContacts
25 records and 100.3 MW behind this preview

Rows are hidden on public pages. Members see every field and can export up to 1,000 rows a month on Solo, unlimited on Unlimited.

Request access

Get alerts for Marion County

We email you when a data center or power project in Marion County is added, changes status, signs an interconnection agreement or slips its date. One email per snapshot, only when something changed.

One email per snapshot, only when something changed. Unsubscribe any time.

Open every campus, project and contact in Marion County.

Solo is $250 a month for one user. Unlimited is $500 for your whole team. Cancel any time.