U.S. Electric Utility Directory · Iowa

Electric utilities in Iowa

Every electric utility serving Iowa in EIA data year 2025, with ownership type, grid operator, balancing authority, customers and the counties each one serves.

Compiled October 31, 2026. Grid operators present: MISO, SPP, Other (no ISO).

Retail utilities1863 investor-owned, 46 co-ops, 135 municipal
All entities186Including marketers and other filers
Counties covered99With at least one utility listed
Retail customers1,631,661Sum of utility customer counts

Retail electric utilities in Iowa

Sorted by customers. See Iowa on the map, and the state regulator, Iowa Utilities Commission.

186 retail utilities serving Iowa
UtilityEIA IDTypeISO or regionBalancing authorityCustomersCounties served
MidAmerican Energy CoMidAmerican Energy (BHE)12341Investor-ownedMISOMISO689,35655 Adair, Adams, Audubon, Black Hawk, Bremer, Buchanan, Buena Vista, Butler, Calhoun, Carroll, Cass, Cerro Gordo, Cherokee, Chickasaw, Clinton, Crawford, Dallas, Floyd, Franklin, Fremont, Hamilton, Hardin, Harrison, Humboldt, Ida, Jasper, Johnson, Kossuth, Lyon, Madison, Mahaska, Marion, Mills, Monona, Monroe, Montgomery, Muscatine, O'Brien, Page, Palo Alto, Plymouth, Pocahontas, Polk, Pottawattamie, Poweshiek, Sac, Scott, Shelby, Sioux, Taylor, Warren, Washington, Webster, Woodbury, Wright
Interstate Power and Light CoAlliant Energy – Interstate Power & Light (IA)9417Investor-ownedMISOMISO490,24584 Adair, Adams, Allamakee, Appanoose, Benton, Black Hawk, Boone, Bremer, Buchanan, Buena Vista, Butler, Carroll, Cass, Cedar, Cerro Gordo, Cherokee, Chickasaw, Clarke, Clay, Clayton, Clinton, Dallas, Davis, Decatur, Delaware, Des Moines, Dickinson, Dubuque, Emmet, Fayette, Floyd, Franklin, Greene, Grundy, Guthrie, Hamilton, Hancock, Hardin, Henry, Howard, Iowa, Jackson, Jasper, Jefferson, Johnson, Jones, Keokuk, Kossuth, Lee, Linn, Louisa, Lucas, Lyon, Madison, Mahaska, Marion, Marshall, Mitchell, Monroe, Montgomery, Muscatine, O'Brien, Osceola, Palo Alto, Pocahontas, Polk, Poweshiek, Ringgold, Scott, Sioux, Story, Tama, Taylor, Union, Van Buren, Wapello, Warren, Washington, Wayne, Webster, Winnebago, Winneshiek, Worth, Wright
Linn County REC11053CooperativeMISOMISO29,5816 Benton, Cedar, Iowa, Johnson, Jones, Linn
City of Ames - (IA)554MunicipalMISOMISO26,9601 Story
Eastern Iowa Light & Power Coop5605CooperativeMISOMISO23,84412 Cedar, Clinton, Des Moines, Henry, Jackson, Johnson, Jones, Linn, Louisa, Muscatine, Scott, Washington
Cedar Falls Utilities3203MunicipalMISOMISO19,6023 Black Hawk, Butler, Grundy
Maquoketa Valley Rrl Elec Coop12642CooperativeMISOMISO16,2419 Buchanan, Cedar, Clayton, Clinton, Delaware, Dubuque, Jackson, Jones, Linn
Iowa Lakes Electric Coop9425CooperativeSPPSWPP12,78713 Buena Vista, Cherokee, Clay, Dickinson, Emmet, Ida, Kossuth, O'Brien, Osceola, Palo Alto, Plymouth, Pocahontas, Sac
Midland Power Coop12450CooperativeMISOMISO11,75617 Boone, Calhoun, Dallas, Franklin, Greene, Grundy, Guthrie, Hamilton, Hardin, Humboldt, Kossuth, Marshall, Pocahontas, Polk, Story, Webster, Wright
Board of Water Electric & Communications13143MunicipalMISOMISO11,4881 Muscatine
North West Rural Electric Coop17260CooperativeSPPSWPP10,04511 Cherokee, Clay, Crawford, Ida, Lyon, O'Brien, Osceola, Plymouth, Sac, Sioux, Woodbury
Allamakee-Clayton El Coop, Inc329CooperativeMISOMISO9,9858 Allamakee, Bremer, Chickasaw, Clayton, Delaware, Dubuque, Fayette, Winneshiek
Access Energy Coop16611CooperativeOther (no ISO)AECI8,90810 Davis, Des Moines, Henry, Jefferson, Keokuk, Lee, Louisa, Van Buren, Wapello, Washington
East-Central Iowa Rural Elec Coop5588CooperativeMISOMISO8,89511 Benton, Black Hawk, Bremer, Buchanan, Clayton, Delaware, Fayette, Iowa, Johnson, Linn, Tama
Indianola Municipal Utilities9275MunicipalMISOMISO8,1871 Warren
MiEnergy Cooperative19157CooperativeMISOMISO7,0166 Allamakee, Chickasaw, Fayette, Howard, Mitchell, Winneshiek
Consumers Energy11788CooperativeMISOMISO6,6585 Jasper, Marshall, Polk, Story, Tama
T I P Rural Electric Coop18446CooperativeMISOMISO6,41010 Benton, Iowa, Jefferson, Johnson, Keokuk, Mahaska, Poweshiek, Tama, Wapello, Washington
City of Spencer - (IA)17783MunicipalMISOMISO6,3841 Clay
Chariton Valley Elec Coop, Inc3314CooperativeOther (no ISO)AECI6,0217 Appanoose, Davis, Lucas, Marion, Monroe, Wapello, Wayne
Southwest Iowa Rural Elec Coop49986CooperativeMISOMISO5,91411 Adair, Adams, Cass, Decatur, Fremont, Mills, Montgomery, Page, Ringgold, Taylor, Union
Western Iowa Power Coop19437CooperativeSPPSWPP5,5139 Audubon, Carroll, Crawford, Harrison, Ida, Monona, Sac, Shelby, Woodbury
Clarke Electric Coop Inc - (IA)3722CooperativeMISOMISO5,3958 Clarke, Decatur, Lucas, Madison, Ringgold, Union, Warren, Wayne
Heartland Power Coop8319CooperativeMISOMISO5,1939 Cerro Gordo, Chickasaw, Floyd, Hancock, Howard, Kossuth, Mitchell, Winnebago, Worth
Waverly Municipal Elec Utility20214MunicipalMISOMISO5,19310 Adair, Bremer, Cass, Dallas, Louisa, Madison, Muscatine, Polk, Pottawattamie, Washington
Butler County Rural Elec Coop - (IA)2652CooperativeSPPSWPP5,0897 Bremer, Butler, Cerro Gordo, Chickasaw, Fayette, Floyd, Franklin
City of Pella - (IA)14645MunicipalMISOMISO4,9602 Mahaska, Marion
Farmers Electric Coop, Inc - (IA)6112CooperativeMISOMISO4,8756 Adair, Audubon, Cass, Guthrie, Madison, Union
Southern Iowa Elec Coop, Inc17643CooperativeOther (no ISO)AECI4,7244 Appanoose, Davis, Van Buren, Wapello
Guthrie County Rural E C A7750CooperativeMISOMISO4,7166 Adair, Audubon, Cass, Dallas, Greene, Guthrie
Atlantic Municipal Utilities965MunicipalMISOMISO4,6364 Audubon, Cass, Pottawattamie, Shelby
City of Webster City - (IA)20259MunicipalMISOMISO4,4121 Hamilton
Prairie Energy Coop15291CooperativeSPPSWPP4,28711 Cerro Gordo, Franklin, Hamilton, Hancock, Hardin, Humboldt, Kossuth, Webster, Winnebago, Worth, Wright
City of Mt Pleasant - (IA)13038MunicipalMISOMISO4,0871 Henry
City of Algona - (IA)309MunicipalSPPSWPP3,7201 Kossuth
Nishnabotna Valley R E C13675CooperativeSPPSWPP3,6796 Audubon, Cass, Crawford, Harrison, Pottawattamie, Shelby
Harrison County Rrl Elec Coop8283CooperativeSPPSWPP3,6235 Crawford, Harrison, Monona, Pottawattamie, Shelby
City of Maquoketa - (IA)11611MunicipalMISOMISO3,3752 Clinton, Jackson
Woodbury County Rural E C A20951CooperativeSPPSWPP3,3265 Cherokee, Ida, Monona, Plymouth, Woodbury
City of Denison - (IA)5056MunicipalSPPSWPP3,2921 Crawford
City of Onawa - (IA)14132MunicipalMISOMISO3,2751 Monona
City of Estherville - (IA)5998MunicipalSPPSWPP3,2061 Emmet
City of Independence - (IA)9230MunicipalMISOMISO3,1531 Buchanan
Pella Cooperative Elec Assn26765CooperativeMISOMISO3,0005 Jasper, Mahaska, Marion, Poweshiek, Warren
City of Sioux Center17264MunicipalMISOMISO2,8091 Sioux
Harlan Municipal Utilities - (IA)8122MunicipalMISOMISO2,7791 Shelby
Raccoon Valley Electric Cooperative7303CooperativeMISOMISO2,7359 Audubon, Buena Vista, Calhoun, Carroll, Crawford, Greene, Guthrie, Ida, Sac
Eldridge City Utilities5742MunicipalMISOMISO2,6981 Scott
City of Winterset - (IA)20835MunicipalMISOMISO2,5901 Madison
City of Vinton - (IA)19865MunicipalMISOMISO2,5081 Benton
City of Osage - (IA)14201MunicipalMISOMISO2,4111 Mitchell
City of New Hampton - (IA)13444MunicipalMISOMISO2,4041 Chickasaw
City of Orange City - (IA)14159MunicipalMISOMISO2,3301 Sioux
Grundy County Rural Elec Coop7864CooperativeMISOMISO2,2676 Black Hawk, Butler, Grundy, Hardin, Marshall, Tama
Lyon Rural Electric Coop11298CooperativeSPPSWPP2,2323 Lyon, Osceola, Sioux
City of Forest City- (IA)6579MunicipalMISOMISO2,1732 Hancock, Winnebago
City of Story City - (IA)18177MunicipalMISOMISO1,9333 Boone, Hamilton, Story
Franklin Rural Electric Coop - (IA)6722CooperativeMISOMISO1,9326 Butler, Cerro Gordo, Floyd, Franklin, Hardin, Wright
City of Sergeant Bluff - (IA)16932MunicipalMISOMISO1,8681 Woodbury
City of Tipton - (IA)18947MunicipalMISOMISO1,8241 Cedar
City of Bellevue - (IA)1515MunicipalMISOMISO1,7401 Jackson
City of Sibley - (IA)17141MunicipalMISOMISO1,7291 Osceola
Calhoun County Elec Coop Assn4040CooperativeMISOMISO1,6955 Calhoun, Greene, Pocahontas, Sac, Webster
City of Milford - (IA)12541MunicipalSPPSWPP1,5941 Dickinson
City of West Liberty - (IA)20380MunicipalMISOMISO1,5801 Muscatine
Grundy Center Mun Light & Power7743MunicipalMISOMISO1,5651 Grundy
City of Carlisle- (IA)3029MunicipalMISOMISO1,5441 Warren
City of Wilton20789MunicipalMISOMISO1,5272 Cedar, Muscatine
City of Guttenberg7837MunicipalMISOMISO1,3961 Clayton
City of Lake View - (IA)10617MunicipalMISOMISO1,3911 Sac
Rock Rapids Municipal Utility16206MunicipalSPPSWPP1,3821 Lyon
City of Bloomfield - (IA)1869MunicipalOther (no ISO)AECI1,3341 Davis
City of Hawarden - (IA)8288MunicipalMISOMISO1,2881 Sioux
City of Lake Mills10606MunicipalMISOMISO1,2481 Winnebago
New London Municipal Utilities13468MunicipalMISOMISO1,2412 Des Moines, Henry
City of Greenfield - (IA)7626MunicipalMISOMISO1,2241 Adair
La Porte City Utilities10542MunicipalMISOMISO1,1791 Black Hawk
Atchison-Holt Electric Coop942CooperativeOther (no ISO)AECI1,1752 Fremont, Page
Osceola Electric Coop, Inc14202CooperativeSPPSWPP1,1744 Dickinson, Lyon, O'Brien, Osceola
City of Ogden - (IA)13990MunicipalMISOMISO1,1711 Boone
City of Sumner - (IA)18301MunicipalMISOMISO1,1501 Bremer
City of Pocahontas - (IA)15180MunicipalMISOMISO1,1481 Pocahontas
City of Corning - (IA)4375MunicipalMISOMISO1,1421 Adams
City of Lamoni - (IA)10650MunicipalMISOMISO1,1361 Decatur
Cascade Municipal Utilities3137MunicipalMISOMISO1,1272 Dubuque, Jones
City of Traer - (IA)19062MunicipalMISOMISO1,0892 Benton, Tama
City of Stuart - (IA)18231MunicipalMISOMISO1,0102 Adair, Guthrie
City of State Center - (IA)18014MunicipalMISOMISO9852 Marshall, Story
City of Alta - (IA)405MunicipalMISOMISO9781 Buena Vista
City of Durant - (IA)5529MunicipalMISOMISO9633 Cedar, Muscatine, Scott
City of Hartley - (IA)8214MunicipalSPPSWPP9331 O'Brien
City of Denver - (IA)5076MunicipalMISOMISO9041 Bremer
City of Woodbine - (IA)20949MunicipalSPPSWPP9031 Harrison
City of Montezuma - (IA)12839MunicipalMISOMISO8881 Poweshiek
Amana Society Service Co471Investor-ownedMISOMISO8861 Iowa
City of Remsen - (IA)15846MunicipalMISOMISO8691 Plymouth
City of Brooklyn - (IA)2287MunicipalMISOMISO8631 Poweshiek
City of Manning11581MunicipalSPPSWPP8501 Carroll
City of Akron - (IA)182MunicipalMISOMISO8381 Plymouth
City of Lenox - (IA)10908MunicipalMISOMISO8021 Taylor
City of Laurens - (IA)10769MunicipalSPPSWPP8011 Pocahontas
City of Coon Rapids4305MunicipalSPPSWPP7952 Carroll, Guthrie
Keosauqua Municipal Light & Pwr10181MunicipalSPPSWPP7721 Van Buren
City of Lake Park - (IA)10608MunicipalMISOMISO7561 Dickinson
City of Mapleton- (IA)11609MunicipalMISOMISO7541 Monona
West Point Utility System20396MunicipalMISOMISO7431 Lee
City of Panora - (IA)14433MunicipalMISOMISO7211 Guthrie
City of Sanborn - (IA)16628MunicipalSPPSWPP7201 O'Brien
City of Villisca - (IA)19843MunicipalMISOMISO7141 Montgomery
City of Dysart - (IA)5518MunicipalMISOMISO7081 Tama
City of Strawberry Point18204MunicipalMISOMISO7071 Clayton
City of Glidden - (IA)7295MunicipalMISOMISO6741 Carroll
City of Paullina - (IA)14577MunicipalMISOMISO6651 O'Brien
City of Primghar - (IA)15377MunicipalMISOMISO6581 O'Brien
Farmers Electric Coop - (IA)6168CooperativeMISOMISO6333 Iowa, Johnson, Washington
Bancroft Municipal Utilities1172MunicipalMISOMISO6281 Kossuth
City of Preston15349MunicipalMISOMISO6241 Jackson
City of Anita - (IA)682MunicipalMISOMISO6171 Cass
City of West Bend20364MunicipalMISOMISO6163 Humboldt, Kossuth, Palo Alto
City of McGregor- (IA)12114MunicipalMISOMISO6091 Clayton
Gowrie Municipal Utilities7424MunicipalMISOMISO5931 Webster
City of Alton198MunicipalMISOMISO5881 Sioux
City of Fairbank - (IA)6127MunicipalMISOMISO5842 Buchanan, Fayette
City of Aplington723MunicipalMISOMISO5581 Butler
City of Fredericksburg - (IA)6759MunicipalMISOMISO5411 Chickasaw
City of Wall Lake - (IA)20025MunicipalMISOMISO5381 Sac
United Electric Coop, Inc - (MO)22646CooperativeOther (no ISO)AECI5273 Page, Ringgold, Taylor
City of Aurelia - (IA)1002MunicipalMISOMISO5161 Cherokee
City of Graettinger - (IA)7443MunicipalMISOMISO5161 Palo Alto
City of Afton- (IA)149MunicipalMISOMISO5141 Union
Town of Manilla - (IA)11568MunicipalMISOMISO4841 Crawford
City of Larchwood - (IA)10706MunicipalMISOMISO4811 Lyon
City of Grand Junction - (IA)7486MunicipalMISOMISO4781 Greene
City of Buffalo - (IA)40390MunicipalMISOMISO4771 Scott
City of Rockford- (IA)16211MunicipalMISOMISO4771 Floyd
City of Fontanelle - (IA)6501MunicipalMISOMISO4681 Adair
City of Dayton - (IA)4919MunicipalMISOMISO4661 Webster
City of Dike5155MunicipalMISOMISO4381 Grundy
City of Danville - (IA)4791MunicipalMISOMISO4372 Des Moines, Henry
City of Earlville - (IA)5563MunicipalMISOMISO4251 Delaware
City of Neola - (IA)13382MunicipalMISOMISO4101 Pottawattamie
City of Stratford - (IA)18201MunicipalMISOMISO4052 Hamilton, Webster
City of Sabula - (IA)16528MunicipalMISOMISO3971 Jackson
City of Hopkinton - (IA)8847MunicipalMISOMISO3791 Delaware
City of Readlyn - (IA)15751MunicipalMISOMISO3761 Bremer
City of Hinton8610MunicipalMISOMISO3681 Plymouth
City of Fonda - (IA)6496MunicipalMISOMISO3631 Pocahontas
City of Coggon - (IA)3900MunicipalMISOMISO3621 Linn
City of Anthon - (IA)700MunicipalSPPSWPP3601 Woodbury
City of Shelby - (IA)17046MunicipalSPPSWPP3452 Pottawattamie, Shelby
City of Stanton - (IA)16992MunicipalMISOMISO3431 Montgomery
City of Whittemore - (IA)20604MunicipalMISOMISO3221 Kossuth
City of Breda - (IA)2183MunicipalMISOMISO3071 Carroll
City of Farnhamville - (IA)6210MunicipalMISOMISO3001 Calhoun
City of Ellsworth - (IA)5827MunicipalMISOMISO2911 Hamilton
City of Burt2600MunicipalMISOMISO2811 Kossuth
City of Lawler - (IA)10784MunicipalMISOMISO2701 Chickasaw
City of Lehigh - (IA)10881MunicipalMISOMISO2591 Webster
City of Stanhope - (IA)27269MunicipalMISOMISO2591 Hamilton
Grundy Electric Coop, Inc7720CooperativeOther (no ISO)AECI2353 Decatur, Ringgold, Wayne
City of Long Grove - (IA)11141MunicipalMISOMISO2301 Scott
City of Kimballton - (IA)10265MunicipalSPPSWPP2181 Audubon
City of Orient - (IA)14166MunicipalMISOMISO2161 Adair
City of Livermore- (IA)11093MunicipalMISOMISO2111 Humboldt
City of Marathon - (IA)10172MunicipalMISOMISO1971 Buena Vista
City of Callender - (IA)2809MunicipalMISOMISO1901 Webster
City of Corwith - (IA)4304MunicipalMISOMISO1871 Hancock
City of Auburn - (IA)995MunicipalMISOMISO1731 Sac
City of Alta Vista- (IA)432MunicipalMISOMISO1721 Chickasaw
City of Renwick - (IA)15862MunicipalMISOMISO1701 Humboldt
Grafton Electric - (IA)7442MunicipalMISOMISO1611 Worth
City of Paton - (IA)14473MunicipalMISOMISO1291 Greene
City of Woolstock - (IA)20846MunicipalMISOMISO1261 Wright
Pleasant Hill Community Line60080CooperativeMISOMISO1261 Hamilton
Boone Valley Electric Coop1968CooperativeMISOMISO1133 Hancock, Humboldt, Wright
Cass Electric Coop3111CooperativeMISOMISO882 Hamilton, Wright
Town of Westfield - (IA)20379MunicipalSPPSWPP751 Plymouth
Federated Rural Electric Assn6258CooperativeMISOMISO624 Dickinson, Emmet, Kossuth, Osceola
Nobles Cooperative Electric13684CooperativeMISOMISO122 Lyon, Osceola
Freeborn-Mower Coop Services6782CooperativeMISOMISO61 Worth
Central Iowa Power Cooperative3258CooperativeMISO——0 —
Corn Belt Power Coop4363CooperativeSPP——0 —
L & O Power Co-operative10574CooperativeOther (no ISO)——0 —
Northwest Iowa Power Coop13798CooperativeSPP——0 —
Omaha Public Power District14127Public power districtSPP——1 Pottawattamie
WAPA-- Western Area Power Administration27000FederalMISO, SPP——16 Adair, Audubon, Cass, Cherokee, Clay, Crawford, Lyon, Monona, O'Brien, Plymouth, Ringgold, Shelby, Sioux, Taylor, Union, Woodbury

Which utilities serve each county in Iowa

99 counties, with the grid operator serving most customers
CountyFIPSISO or regionUtilitiesUtilities serving the county
Adair19001MISO11MidAmerican Energy Co, Interstate Power and Light Co, City of Greenfield - (IA), Farmers Electric Coop, Inc - (IA), Guthrie County Rural E C A, Southwest Iowa Rural Elec Coop, Waverly Municipal Elec Utility, City of Stuart - (IA), City of Fontanelle - (IA), City of Orient - (IA), WAPA-- Western Area Power Administration
Adams19003MISO4MidAmerican Energy Co, Interstate Power and Light Co, City of Corning - (IA), Southwest Iowa Rural Elec Coop
Allamakee19005MISO3Interstate Power and Light Co, Allamakee-Clayton El Coop, Inc, MiEnergy Cooperative
Appanoose19007MISO3Interstate Power and Light Co, Southern Iowa Elec Coop, Inc, Chariton Valley Elec Coop, Inc
Audubon19009MISO9MidAmerican Energy Co, Atlantic Municipal Utilities, Farmers Electric Coop, Inc - (IA), Guthrie County Rural E C A, Nishnabotna Valley R E C, Western Iowa Power Coop, Raccoon Valley Electric Cooperative, City of Kimballton - (IA), WAPA-- Western Area Power Administration
Benton19011MISO6Interstate Power and Light Co, Linn County REC, City of Vinton - (IA), East-Central Iowa Rural Elec Coop, T I P Rural Electric Coop, City of Traer - (IA)
Black Hawk19013MISO6MidAmerican Energy Co, Cedar Falls Utilities, Interstate Power and Light Co, La Porte City Utilities, East-Central Iowa Rural Elec Coop, Grundy County Rural Elec Coop
Boone19015MISO4Interstate Power and Light Co, City of Ogden - (IA), Midland Power Coop, City of Story City - (IA)
Bremer19017MISO9MidAmerican Energy Co, Interstate Power and Light Co, Allamakee-Clayton El Coop, Inc, City of Sumner - (IA), City of Denver - (IA), East-Central Iowa Rural Elec Coop, Butler County Rural Elec Coop - (IA), Waverly Municipal Elec Utility, City of Readlyn - (IA)
Buchanan19019MISO6MidAmerican Energy Co, Interstate Power and Light Co, City of Independence - (IA), Maquoketa Valley Rrl Elec Coop, East-Central Iowa Rural Elec Coop, City of Fairbank - (IA)
Buena Vista19021MISO6MidAmerican Energy Co, Interstate Power and Light Co, Iowa Lakes Electric Coop, City of Alta - (IA), Raccoon Valley Electric Cooperative, City of Marathon - (IA)
Butler19023MISO7MidAmerican Energy Co, Cedar Falls Utilities, Interstate Power and Light Co, Butler County Rural Elec Coop - (IA), City of Aplington, Grundy County Rural Elec Coop, Franklin Rural Electric Coop - (IA)
Calhoun19025MISO5MidAmerican Energy Co, Midland Power Coop, Calhoun County Elec Coop Assn, Raccoon Valley Electric Cooperative, City of Farnhamville - (IA)
Carroll19027MISO8MidAmerican Energy Co, Interstate Power and Light Co, City of Manning, City of Glidden - (IA), Western Iowa Power Coop, City of Coon Rapids, City of Breda - (IA), Raccoon Valley Electric Cooperative
Cass19029MISO10MidAmerican Energy Co, Interstate Power and Light Co, Atlantic Municipal Utilities, Farmers Electric Coop, Inc - (IA), Guthrie County Rural E C A, City of Anita - (IA), Nishnabotna Valley R E C, Southwest Iowa Rural Elec Coop, Waverly Municipal Elec Utility, WAPA-- Western Area Power Administration
Cedar19031MISO7Interstate Power and Light Co, Linn County REC, Eastern Iowa Light & Power Coop, City of Tipton - (IA), Maquoketa Valley Rrl Elec Coop, City of Wilton, City of Durant - (IA)
Cerro Gordo19033MISO6MidAmerican Energy Co, Interstate Power and Light Co, Butler County Rural Elec Coop - (IA), Heartland Power Coop, Prairie Energy Coop, Franklin Rural Electric Coop - (IA)
Cherokee19035MISO7MidAmerican Energy Co, Interstate Power and Light Co, Iowa Lakes Electric Coop, North West Rural Electric Coop, Woodbury County Rural E C A, City of Aurelia - (IA), WAPA-- Western Area Power Administration
Chickasaw19037MISO10MidAmerican Energy Co, Interstate Power and Light Co, City of New Hampton - (IA), Allamakee-Clayton El Coop, Inc, MiEnergy Cooperative, Butler County Rural Elec Coop - (IA), Heartland Power Coop, City of Fredericksburg - (IA), City of Lawler - (IA), City of Alta Vista- (IA)
Clarke19039MISO2Interstate Power and Light Co, Clarke Electric Coop Inc - (IA)
Clay19041MISO5City of Spencer - (IA), Interstate Power and Light Co, Iowa Lakes Electric Coop, North West Rural Electric Coop, WAPA-- Western Area Power Administration
Clayton19043MISO7Interstate Power and Light Co, Maquoketa Valley Rrl Elec Coop, City of Guttenberg, Allamakee-Clayton El Coop, Inc, East-Central Iowa Rural Elec Coop, City of Strawberry Point, City of McGregor- (IA)
Clinton19045MISO5MidAmerican Energy Co, Interstate Power and Light Co, Eastern Iowa Light & Power Coop, Maquoketa Valley Rrl Elec Coop, City of Maquoketa - (IA)
Crawford19047MISO9MidAmerican Energy Co, City of Denison - (IA), North West Rural Electric Coop, Harrison County Rrl Elec Coop, Nishnabotna Valley R E C, Western Iowa Power Coop, Town of Manilla - (IA), Raccoon Valley Electric Cooperative, WAPA-- Western Area Power Administration
Dallas19049MISO5MidAmerican Energy Co, Interstate Power and Light Co, Guthrie County Rural E C A, Midland Power Coop, Waverly Municipal Elec Utility
Davis19051MISO5Interstate Power and Light Co, City of Bloomfield - (IA), Southern Iowa Elec Coop, Inc, Access Energy Coop, Chariton Valley Elec Coop, Inc
Decatur19053MISO5Interstate Power and Light Co, City of Lamoni - (IA), Clarke Electric Coop Inc - (IA), Southwest Iowa Rural Elec Coop, Grundy Electric Coop, Inc
Delaware19055MISO6Interstate Power and Light Co, Maquoketa Valley Rrl Elec Coop, Allamakee-Clayton El Coop, Inc, East-Central Iowa Rural Elec Coop, City of Earlville - (IA), City of Hopkinton - (IA)
Des Moines19057MISO5Interstate Power and Light Co, Eastern Iowa Light & Power Coop, Access Energy Coop, New London Municipal Utilities, City of Danville - (IA)
Dickinson19059MISO6Interstate Power and Light Co, City of Milford - (IA), Iowa Lakes Electric Coop, City of Lake Park - (IA), Osceola Electric Coop, Inc, Federated Rural Electric Assn
Dubuque19061MISO4Interstate Power and Light Co, Maquoketa Valley Rrl Elec Coop, Allamakee-Clayton El Coop, Inc, Cascade Municipal Utilities
Emmet19063MISO4Interstate Power and Light Co, City of Estherville - (IA), Iowa Lakes Electric Coop, Federated Rural Electric Assn
Fayette19065MISO6Interstate Power and Light Co, Allamakee-Clayton El Coop, Inc, MiEnergy Cooperative, East-Central Iowa Rural Elec Coop, Butler County Rural Elec Coop - (IA), City of Fairbank - (IA)
Floyd19067MISO6MidAmerican Energy Co, Interstate Power and Light Co, Butler County Rural Elec Coop - (IA), Heartland Power Coop, City of Rockford- (IA), Franklin Rural Electric Coop - (IA)
Franklin19069MISO6MidAmerican Energy Co, Interstate Power and Light Co, Butler County Rural Elec Coop - (IA), Midland Power Coop, Prairie Energy Coop, Franklin Rural Electric Coop - (IA)
Fremont19071MISO3MidAmerican Energy Co, Atchison-Holt Electric Coop, Southwest Iowa Rural Elec Coop
Greene19073MISO7Interstate Power and Light Co, Guthrie County Rural E C A, Midland Power Coop, City of Grand Junction - (IA), Calhoun County Elec Coop Assn, Raccoon Valley Electric Cooperative, City of Paton - (IA)
Grundy19075MISO6Cedar Falls Utilities, Interstate Power and Light Co, Grundy Center Mun Light & Power, Midland Power Coop, City of Dike, Grundy County Rural Elec Coop
Guthrie19077MISO8Interstate Power and Light Co, Farmers Electric Coop, Inc - (IA), Guthrie County Rural E C A, City of Panora - (IA), Midland Power Coop, City of Stuart - (IA), City of Coon Rapids, Raccoon Valley Electric Cooperative
Hamilton19079MISO11MidAmerican Energy Co, Interstate Power and Light Co, City of Webster City - (IA), Midland Power Coop, City of Story City - (IA), Prairie Energy Coop, City of Ellsworth - (IA), City of Stanhope - (IA), City of Stratford - (IA), Pleasant Hill Community Line, Cass Electric Coop
Hancock19081MISO6Interstate Power and Light Co, City of Forest City- (IA), Heartland Power Coop, Prairie Energy Coop, City of Corwith - (IA), Boone Valley Electric Coop
Hardin19083MISO6MidAmerican Energy Co, Interstate Power and Light Co, Midland Power Coop, Prairie Energy Coop, Grundy County Rural Elec Coop, Franklin Rural Electric Coop - (IA)
Harrison19085MISO5MidAmerican Energy Co, City of Woodbine - (IA), Harrison County Rrl Elec Coop, Nishnabotna Valley R E C, Western Iowa Power Coop
Henry19087MISO6Interstate Power and Light Co, City of Mt Pleasant - (IA), Eastern Iowa Light & Power Coop, Access Energy Coop, New London Municipal Utilities, City of Danville - (IA)
Howard19089MISO3Interstate Power and Light Co, MiEnergy Cooperative, Heartland Power Coop
Humboldt19091MISO7MidAmerican Energy Co, Midland Power Coop, Prairie Energy Coop, City of Livermore- (IA), City of West Bend, City of Renwick - (IA), Boone Valley Electric Coop
Ida19093MISO6MidAmerican Energy Co, Iowa Lakes Electric Coop, North West Rural Electric Coop, Woodbury County Rural E C A, Western Iowa Power Coop, Raccoon Valley Electric Cooperative
Iowa19095MISO6Interstate Power and Light Co, Linn County REC, Amana Society Service Co, East-Central Iowa Rural Elec Coop, T I P Rural Electric Coop, Farmers Electric Coop - (IA)
Jackson19097MISO7Interstate Power and Light Co, Eastern Iowa Light & Power Coop, Maquoketa Valley Rrl Elec Coop, City of Bellevue - (IA), City of Maquoketa - (IA), City of Preston, City of Sabula - (IA)
Jasper19099MISO4MidAmerican Energy Co, Interstate Power and Light Co, Consumers Energy, Pella Cooperative Elec Assn
Jefferson19101MISO3Interstate Power and Light Co, Access Energy Coop, T I P Rural Electric Coop
Johnson19103MISO7MidAmerican Energy Co, Interstate Power and Light Co, Linn County REC, Eastern Iowa Light & Power Coop, East-Central Iowa Rural Elec Coop, T I P Rural Electric Coop, Farmers Electric Coop - (IA)
Jones19105MISO5Interstate Power and Light Co, Linn County REC, Eastern Iowa Light & Power Coop, Maquoketa Valley Rrl Elec Coop, Cascade Municipal Utilities
Keokuk19107MISO3Interstate Power and Light Co, Access Energy Coop, T I P Rural Electric Coop
Kossuth19109MISO12MidAmerican Energy Co, Interstate Power and Light Co, City of Algona - (IA), Iowa Lakes Electric Coop, Midland Power Coop, Bancroft Municipal Utilities, Heartland Power Coop, Prairie Energy Coop, City of Whittemore - (IA), City of Burt, City of West Bend, Federated Rural Electric Assn
Lee19111MISO3Interstate Power and Light Co, Access Energy Coop, West Point Utility System
Linn19113MISO6Interstate Power and Light Co, Linn County REC, Eastern Iowa Light & Power Coop, Maquoketa Valley Rrl Elec Coop, East-Central Iowa Rural Elec Coop, City of Coggon - (IA)
Louisa19115MISO4Interstate Power and Light Co, Eastern Iowa Light & Power Coop, Access Energy Coop, Waverly Municipal Elec Utility
Lucas19117MISO3Interstate Power and Light Co, Chariton Valley Elec Coop, Inc, Clarke Electric Coop Inc - (IA)
Lyon19119MISO9MidAmerican Energy Co, Interstate Power and Light Co, Rock Rapids Municipal Utility, North West Rural Electric Coop, Lyon Rural Electric Coop, City of Larchwood - (IA), Osceola Electric Coop, Inc, Nobles Cooperative Electric, WAPA-- Western Area Power Administration
Madison19121MISO6MidAmerican Energy Co, Interstate Power and Light Co, City of Winterset - (IA), Farmers Electric Coop, Inc - (IA), Clarke Electric Coop Inc - (IA), Waverly Municipal Elec Utility
Mahaska19123MISO5MidAmerican Energy Co, Interstate Power and Light Co, City of Pella - (IA), T I P Rural Electric Coop, Pella Cooperative Elec Assn
Marion19125MISO5MidAmerican Energy Co, Interstate Power and Light Co, City of Pella - (IA), Chariton Valley Elec Coop, Inc, Pella Cooperative Elec Assn
Marshall19127MISO5Interstate Power and Light Co, Consumers Energy, Midland Power Coop, City of State Center - (IA), Grundy County Rural Elec Coop
Mills19129MISO2MidAmerican Energy Co, Southwest Iowa Rural Elec Coop
Mitchell19131MISO4Interstate Power and Light Co, City of Osage - (IA), MiEnergy Cooperative, Heartland Power Coop
Monona19133MISO7MidAmerican Energy Co, City of Onawa - (IA), City of Mapleton- (IA), Harrison County Rrl Elec Coop, Woodbury County Rural E C A, Western Iowa Power Coop, WAPA-- Western Area Power Administration
Monroe19135MISO3MidAmerican Energy Co, Interstate Power and Light Co, Chariton Valley Elec Coop, Inc
Montgomery19137MISO5MidAmerican Energy Co, Interstate Power and Light Co, City of Villisca - (IA), Southwest Iowa Rural Elec Coop, City of Stanton - (IA)
Muscatine19139MISO8MidAmerican Energy Co, Board of Water Electric & Communications, Interstate Power and Light Co, Eastern Iowa Light & Power Coop, City of West Liberty - (IA), City of Wilton, Waverly Municipal Elec Utility, City of Durant - (IA)
O'Brien19141MISO10MidAmerican Energy Co, Interstate Power and Light Co, Iowa Lakes Electric Coop, City of Hartley - (IA), North West Rural Electric Coop, City of Sanborn - (IA), City of Paullina - (IA), City of Primghar - (IA), Osceola Electric Coop, Inc, WAPA-- Western Area Power Administration
Osceola19143MISO8Interstate Power and Light Co, City of Sibley - (IA), Iowa Lakes Electric Coop, North West Rural Electric Coop, Lyon Rural Electric Coop, Osceola Electric Coop, Inc, Federated Rural Electric Assn, Nobles Cooperative Electric
Page19145MISO4MidAmerican Energy Co, Atchison-Holt Electric Coop, Southwest Iowa Rural Elec Coop, United Electric Coop, Inc - (MO)
Palo Alto19147MISO5MidAmerican Energy Co, Interstate Power and Light Co, Iowa Lakes Electric Coop, City of Graettinger - (IA), City of West Bend
Plymouth19149MISO9MidAmerican Energy Co, Iowa Lakes Electric Coop, North West Rural Electric Coop, City of Remsen - (IA), City of Akron - (IA), Woodbury County Rural E C A, City of Hinton, Town of Westfield - (IA), WAPA-- Western Area Power Administration
Pocahontas19151MISO8MidAmerican Energy Co, Interstate Power and Light Co, City of Pocahontas - (IA), Iowa Lakes Electric Coop, City of Laurens - (IA), Midland Power Coop, City of Fonda - (IA), Calhoun County Elec Coop Assn
Polk19153MISO5MidAmerican Energy Co, Interstate Power and Light Co, Consumers Energy, Midland Power Coop, Waverly Municipal Elec Utility
Pottawattamie19155MISO8MidAmerican Energy Co, Atlantic Municipal Utilities, Harrison County Rrl Elec Coop, Nishnabotna Valley R E C, Waverly Municipal Elec Utility, City of Neola - (IA), City of Shelby - (IA), Omaha Public Power District
Poweshiek19157MISO6MidAmerican Energy Co, Interstate Power and Light Co, City of Montezuma - (IA), City of Brooklyn - (IA), T I P Rural Electric Coop, Pella Cooperative Elec Assn
Ringgold19159MISO6Interstate Power and Light Co, Clarke Electric Coop Inc - (IA), Southwest Iowa Rural Elec Coop, United Electric Coop, Inc - (MO), Grundy Electric Coop, Inc, WAPA-- Western Area Power Administration
Sac19161MISO9MidAmerican Energy Co, City of Lake View - (IA), Iowa Lakes Electric Coop, North West Rural Electric Coop, Western Iowa Power Coop, City of Wall Lake - (IA), Calhoun County Elec Coop Assn, Raccoon Valley Electric Cooperative, City of Auburn - (IA)
Scott19163MISO7MidAmerican Energy Co, Interstate Power and Light Co, Eldridge City Utilities, Eastern Iowa Light & Power Coop, City of Buffalo - (IA), City of Durant - (IA), City of Long Grove - (IA)
Shelby19165MISO8MidAmerican Energy Co, Harlan Municipal Utilities - (IA), Atlantic Municipal Utilities, Harrison County Rrl Elec Coop, Nishnabotna Valley R E C, Western Iowa Power Coop, City of Shelby - (IA), WAPA-- Western Area Power Administration
Sioux19167MISO9MidAmerican Energy Co, Interstate Power and Light Co, City of Sioux Center, City of Orange City - (IA), City of Hawarden - (IA), North West Rural Electric Coop, Lyon Rural Electric Coop, City of Alton, WAPA-- Western Area Power Administration
Story19169MISO6City of Ames - (IA), Interstate Power and Light Co, Consumers Energy, Midland Power Coop, City of Story City - (IA), City of State Center - (IA)
Tama19171MISO7Interstate Power and Light Co, Consumers Energy, East-Central Iowa Rural Elec Coop, City of Dysart - (IA), T I P Rural Electric Coop, City of Traer - (IA), Grundy County Rural Elec Coop
Taylor19173MISO6MidAmerican Energy Co, Interstate Power and Light Co, City of Lenox - (IA), Southwest Iowa Rural Elec Coop, United Electric Coop, Inc - (MO), WAPA-- Western Area Power Administration
Union19175MISO6Interstate Power and Light Co, Farmers Electric Coop, Inc - (IA), Clarke Electric Coop Inc - (IA), Southwest Iowa Rural Elec Coop, City of Afton- (IA), WAPA-- Western Area Power Administration
Van Buren19177MISO4Interstate Power and Light Co, Southern Iowa Elec Coop, Inc, Access Energy Coop, Keosauqua Municipal Light & Pwr
Wapello19179MISO5Interstate Power and Light Co, Southern Iowa Elec Coop, Inc, Access Energy Coop, Chariton Valley Elec Coop, Inc, T I P Rural Electric Coop
Warren19181MISO6MidAmerican Energy Co, Indianola Municipal Utilities, Interstate Power and Light Co, City of Carlisle- (IA), Clarke Electric Coop Inc - (IA), Pella Cooperative Elec Assn
Washington19183MISO7MidAmerican Energy Co, Interstate Power and Light Co, Eastern Iowa Light & Power Coop, Access Energy Coop, T I P Rural Electric Coop, Waverly Municipal Elec Utility, Farmers Electric Coop - (IA)
Wayne19185MISO4Interstate Power and Light Co, Chariton Valley Elec Coop, Inc, Clarke Electric Coop Inc - (IA), Grundy Electric Coop, Inc
Webster19187MISO10MidAmerican Energy Co, Interstate Power and Light Co, Midland Power Coop, Gowrie Municipal Utilities, City of Dayton - (IA), Prairie Energy Coop, Calhoun County Elec Coop Assn, City of Lehigh - (IA), City of Stratford - (IA), City of Callender - (IA)
Winnebago19189MISO5Interstate Power and Light Co, City of Lake Mills, City of Forest City- (IA), Heartland Power Coop, Prairie Energy Coop
Winneshiek19191MISO3Interstate Power and Light Co, Allamakee-Clayton El Coop, Inc, MiEnergy Cooperative
Woodbury19193MISO7MidAmerican Energy Co, City of Sergeant Bluff - (IA), North West Rural Electric Coop, Woodbury County Rural E C A, Western Iowa Power Coop, City of Anthon - (IA), WAPA-- Western Area Power Administration
Worth19195MISO5Interstate Power and Light Co, Heartland Power Coop, Prairie Energy Coop, Grafton Electric - (IA), Freeborn-Mower Coop Services
Wright19197MISO8MidAmerican Energy Co, Interstate Power and Light Co, Midland Power Coop, Prairie Energy Coop, Franklin Rural Electric Coop - (IA), City of Woolstock - (IA), Cass Electric Coop, Boone Valley Electric Coop

About this data

Which utilities exist comes from the U.S. Energy Information Administration’s Form EIA-861 and EIA-861S, data year 2025 (final release, October 7, 2026), read directly from eia.gov. County service territories, balancing authority codes and customer counts come from EIA-861 for 2018, the latest year compiled at county level for this directory; utilities that started reporting after 2018 carry their 2025 values. County boundaries are U.S. Census cartographic boundaries (us-atlas 3.0, Albers USA projection).

Customer counts are per utility within Iowa. A county’s grid operator is the one serving most of its customers, estimated by spreading each utility’s customers evenly over its counties. Download every state in one file from the U.S. Electric Utility Directory.

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