Power plants in Marshall County, Iowa
5 operating power plants in Marshall County, Iowa, with 1,179 MW of nameplate capacity, largest first. From EIA-860M, August 2026.
Plants
5
Nameplate capacity
1,179 MW
Net generation, 2025
4.29 TWh
Largest power plants in Marshall County
| # | Plant | MW | GWh, 2025 | Capacity factor |
|---|---|---|---|---|
| 1 | Marshalltown Generating StationNatural gas | 709 | 3,178 | 51.2% |
| 2 | MarshalltownNatural gas | 189 | 20.3 | 1.2% |
| 3 | Vienna Wind FarmWind | 150 | 622 | 47.3% |
| 4 | Laurel Wind FarmWind | 123 | 470 | 43.5% |
| 5 | State CenterOil and natural gas | 7.1 | 0.2 | 0.2% |
MW is the nameplate capacity of operating generators and batteries. Source: EIA-860M August 2026, published 2026-09-24, and EIA-923 2025. Page updated 2026-10-04. Data sources
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