How many hydroelectric power plants are in Iowa?

4, with 184 MW of nameplate capacity between them, spread over 4 counties. That is the EIA-860M operating count for 2026-07.

Is there a map of Iowa hydroelectric power plants?

Yes — the map above. Each dot is one hydroelectric power plant, sized by nameplate capacity and placed at the coordinates EIA files for it.

Which is the largest hydroelectric power plant in Iowa?

Keokuk, at 125 MW. The table is sorted largest first, so the rest follow it.

Is there a hydroelectric power plant near me in Iowa?

The county roll-up below groups every plant by county, which is the quickest way to find the one closest to a given town.

Which grid operator runs Iowa's hydroelectric power plants?

Most of them sit inside MISO, according to the balancing-authority code EIA files against each plant. Live conditions for that market are on this site.

How current is this, and what is left out?

EIA-860M for 2026-07. Conventional hydroelectric. Pumped storage is counted separately. Plants below 1 MW are not surveyed by EIA and so are absent; retirements and additions after 2026-07 arrive with the next monthly release.

Hydroelectric Power Plants in Iowa

Every operating hydroelectric power plant in Iowa on EIA-860M for 2026-07: 4 plants, 22 generating units and 184 MW of nameplate capacity across 4 counties, most of it inside MISO.

As of 2026-07 (inventory dated 2026-07-31) · EIA-860M Preliminary Monthly Electric Generator Inventory · eia.gov/…/july_generator2026.xlsx · eia.gov/…/eia860m

Plants: 4; 22 generating units
Nameplate capacity: 184 MW
Counties: 4
Grid operator: MISO; covers most of these plants

Map of hydroelectric power plants in Iowa

Every one of the 4 plants is drawn at the coordinate EIA files for it.

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Hydro · 4

List of hydroelectric power plants in Iowa

Sort by any column. Capacity is nameplate, summed across every generating unit EIA lists at the site.

hydroelectric power plants in Iowa

KeokukConventional Hydroelectric	Union Electric Co - (MO)	Lee	124.8	15	1913	Operating
Red Rock Hydro PlantConventional Hydroelectric	Western Minnesota Mun Pwr Agny	Marion	55.2	2	2021	Operating
Ottumwa City ofConventional Hydroelectric	City of Ottumwa - (IA)	Wapello	3.2	3	1931	Operating
Iowa Hydro LLCConventional Hydroelectric	Zero6 Energy Hydro	Jackson	1.2	2	1924	Operating

Largest hydroelectric power plants in Iowa

1KeokukLee County, Iowa124.8 MW
2Red Rock Hydro PlantMarion County, Iowa55.2 MW
3Ottumwa City ofWapello County, Iowa3.2 MW
4Iowa Hydro LLCJackson County, Iowa1.2 MW

Hydroelectric power plants by county in Iowa

The county EIA files against each plant. It is the fastest way to find the plant nearest a given town.

County	Plants	Nameplate MW
Lee	1	124.8
Marion	1	55.2
Wapello	1	3.2
Jackson	1	1.2

Hydroelectric Power Plants in Iowa: FAQ

How many hydroelectric power plants are in Iowa?: 4, with 184 MW of nameplate capacity between them, spread over 4 counties. That is the EIA-860M operating count for 2026-07.
Is there a map of Iowa hydroelectric power plants?: Yes — the map above. Each dot is one hydroelectric power plant, sized by nameplate capacity and placed at the coordinates EIA files for it.
Which is the largest hydroelectric power plant in Iowa?: Keokuk, at 125 MW. The table is sorted largest first, so the rest follow it.
Is there a hydroelectric power plant near me in Iowa?: The county roll-up below groups every plant by county, which is the quickest way to find the one closest to a given town.
Which grid operator runs Iowa's hydroelectric power plants?: Most of them sit inside MISO, according to the balancing-authority code EIA files against each plant. Live conditions for that market are on this site.
How current is this, and what is left out?: EIA-860M for 2026-07. Conventional hydroelectric. Pumped storage is counted separately. Plants below 1 MW are not surveyed by EIA and so are absent; retirements and additions after 2026-07 arrive with the next monthly release.