| City/Town | County |
| City/Town | County |
| Abingdon | Jefferson |
| Ackley | Franklin |
| Ackley | Hardin |
| Ackworth | Warren |
| Adair | Adair |
| Adel | Dallas |
| Afton | Union |
| Agency | Wapello |
| Ainsworth | Washington |
| Akeny | Polk |
| Akron | Plymouth |
| Albert City | Buena Vista |
| Albia | Monroe |
| Albion | Marshall |
| Alburnett | Linn |
| Alden | Hardin |
| Alexander | Franklin |
| Algona | Kossuth |
| Alleman | Polk |
| Allerton | Wayne |
| Allison | Butler |
| Alta | Buena Vista |
| Alta Vista | Chickasaw |
| Alton | Sioux |
| Altoona | Polk |
| Alvord | Lyon |
| Amana | Iowa |
| Ames | Story |
| Anamosa | Jones |
| Andover | Clinton |
| Andrew | Jackson |
| Anita | Cass |
| Anthon | Woodbury |
| Aplington | Butler |
| Arcadia | Carroll |
| Archer | O'Brien |
| Aredale | Butler |
| Argyle (unincorporated) | Lee |
| Arion | Crawford |
| Arispe | Union |
| Arlington | Fayette |
| Armstrong | Emmet |
| Arnolds Park | Dickinson |
| Arthur | Ida |
| Asbury | Dubuque |
| Ashland | Wapello |
| Ashton | Osceola |
| Aspinwall | Crawford |
| Atalissa | Muscatine |
| Athelstan | Taylor |
| Atkins | Benton |
| Atlantic | Cass |
| Auburn | Sac |
| Audubon | Audubon |
| Aurelia | Cherokee |
| Aurora | Buchanan |
| Avoca | Pottawattamie |
| Ayrshire | Palo Alto |
| Badger | Webster |
| Bagley | Guthrie |
| Baldwin | Jackson |
| Balltown | Dubuque |
| Bancroft | Kossuth |
| Bangor | Marshall |
| Bankston | Dubuque |
| Barnes City | Mahaska |
| Barnum | Webster |
| Bassett | Chickasaw |
| Batavia | Jefferson |
| Batavia | Wapello |
| Battle Creek | Ida |
| Baxter | Jasper |
| Bayard | Guthrie |
| Beacon | Mahaska |
| Beaconsfield | Ringgold |
| Beaman | Grundy |
| Beaver | Boone |
| Beckwith | Jefferson |
| Bedford | Taylor |
| Belle Plaine | Benton |
| Bellevue | Jackson |
| Belmond | Wright |
| Beloit | Lyon |
| Bennett | Cedar |
| Bentley | Pottawattamie |
| Benton | Ringgold |
| Berkley | Boone |
| Bernard | Dubuque |
| Bertram | Linn |
| Berwick | Polk |
| Bettendorf | Scott |
| Bevington | Madison |
| Big Rock | Scott |
| Birmingham | Van Buren |
| Bladensburg | Wapello |
| Blairsburg | Hamilton |
| Blairstown | Benton |
| Blakesburg | Wapello |
| Blanchard | Page |
| Blencoe | Monona |
| Blockton | Taylor |
| Bloomfield | Davis |
| Blue Grass | Scott |
| Bode | Humboldt |
| Bonaparte | Van Buren |
| Bondurant | Polk |
| Boone | Boone |
| Booneville | Dallas |
| Bouton | Dallas |
| Boxholm | Boone |
| Boyden | Sioux |
| Braddyville | Page |
| Bradford (Unincorporated) | Franklin |
| Bradgate | Humboldt |
| Brandon | Buchanan |
| Brayton | Audubon |
| Breda | Carroll |
| Bridgewater | Adair |
| Brighton | Washington |
| Bristow | Butler |
| Britt | Hancock |
| Bronson | Woodbury |
| Brooklyn | Poweshiek |
| Brunsville | Plymouth |
| Buck Grove | Crawford |
| Buckeye | Hardin |
| Buffalo | Scott |
| Buffalo Center | Winnebago |
| Burlington | Des Moines |
| Burt | Kossuth |
| Bussey | Marion |
| Cadda | Scott |
| Calamus | Clinton |
| Callender | Webster |
| Calmar | Winneshiek |
| Calumet | O'Brien |
| Camanche | Clinton |
| Cambridge | Story |
| Cantril | Van Buren |
| Carbon | Adams |
| Carlisle | Polk |
| Carlisle | Warren |
| Carpenter | Mitchell |
| Carroll | Carroll |
| Carson | Pottawattamie |
| Carter Lake | Pottawattamie |
| Cascade | Dubuque |
| Cascade | Jones |
| Casey | Adair |
| Castalia | Winneshiek |
| Castana | Monona |
| Cedar Bluff | Cedar |
| Cedar Falls | Black Hawk |
| Cedar Rapids | Linn |
| Cedar Valley | Cedar |
| Center Junction | Jones |
| Center Point | Linn |
| Centerville | Appanoose |
| Central City | Linn |
| Centralia | Dubuque |
| Chapin (Unincorporated) | Franklin |
| Chariton | Lucas |
| Charles City | Floyd |
| Charlotte | Clinton |
| Charter Oak | Crawford |
| Chatsworth | Sioux |
| Chelsea | Tama |
| Cherokee | Cherokee |
| Chester | Howard |
| Chillicothe | Wapello |
| Churdan | Greene |
| Cincinnati | Appanoose |
| Clare | Webster |
| Clarinda | Page |
| Clarion | Wright |
| Clarksville | Butler |
| Clayton | Clayton |
| Clear Lake | Cerro Gordo |
| Clearfield | Ringgold |
| Cleghorn | Cherokee |
| Clemons | Marshall |
| Clermont | Fayette |
| Cleves (Unincorporated) | Hardin |
| Clinton | Clinton |
| Clio | Wayne |
| Clive | Polk |
| Clive (part) | Dallas |
| Clutier | Tama |
| Clyde | Jasper |
| Coal Siding (historical) | Jasper |
| Coalville | Webster |
| Coburg | Montgomery |
| Coggon | Linn |
| Coin | Page |
| Colesburg | Delaware |
| Colfax | Jasper |
| College Springs | Page |
| Collins | Story |
| Colo | Story |
| Columbia (unincorporated) | Marion |
| Columbus City | Louisa |
| Columbus Junction | Louisa |
| Colwell | Floyd |
| Conesville | Muscatine |
| Conrad | Grundy |
| Conway | Taylor |
| Coon Rapids | Carroll |
| Coppock | Henry |
| Coralville | Johnson |
| Corning | Adams |
| Correctionville | Woodbury |
| Corwith | Hancock |
| Corydon | Wayne |
| Cotter | Louisa |
| Coulter | Franklin |
| Council Bluffs | Pottawattamie |
| Cranston | Muscatine |
| Crawfordsville | Washington |
| Crescent | Pottawattamie |
| Cresco | Howard |
| Creston | Union |
| Cromwell | Union |
| Crystal Lake | Hancock |
| Cumberland | Cass |
| Cumming | Warren |
| Curlew | Palo Alto |
| Cushing | Woodbury |
| Cylinder | Palo Alto |
| Dahlonega | Wapello |
| Dakota City | Humboldt |
| Dallas Center | Dallas |
| Dana | Greene |
| Danbury | Woodbury |
| Danville | Des Moines |
| Davenport | Scott |
| Davis City | Decatur |
| Dawson | Dallas |
| Dayton | Webster |
| De Soto | Dallas |
| Decatur | Decatur |
| Decorah | Winneshiek |
| Dedham | Carroll |
| Deep River | Poweshiek |
| Defiance | Shelby |
| Delaware | Delaware |
| Delhi | Delaware |
| Delmar | Clinton |
| Deloit | Crawford |
| Delta | Keokuk |
| Denison | Crawford |
| Denmark (unincorporated) | Lee |
| Denver | Bremer |
| Derby | Lucas |
| Des Moines | Polk |
| Dewar (Unincorporated) | Black Hawk |
| DeWitt | Clinton |
| Dexter | Dallas |
| Diagonal | Ringgold |
| Dickens | Clay |
| Dike | Grundy |
| Dixon | Scott |
| Dolliver | Emmet |
| Donahue | Scott |
| Donnan (Unincorporated) | Fayette |
| Donnellson | Lee |
| Doon | Lyon |
| Douds | Van Buren |
| Dougherty | Cerro Gordo |
| Dow City | Crawford |
| Downey | Cedar |
| Dows | Franklin |
| Dows | Wright |
| Drakesville | Davis |
| Dubuque | Dubuque |
| Dumont | Butler |
| Dunbar | Marshall |
| Duncombe | Webster |
| Dundee | Delaware |
| Dunkerton | Black Hawk |
| Dunlap | Harrison |
| Durango | Dubuque |
| Durant | Cedar |
| Dyersville | Delaware |
| Dyersville | Dubuque |
| Dysart | Tama |
| Eagle Center (Unincorporated) | Black Hawk |
| Eagle Grove | Wright |
| Earlham | Madison |
| Earling | Shelby |
| Earlville | Delaware |
| Early | Sac |
| East Peru | Madison |
| Eddyville | Mahaska |
| Eddyville | Monroe |
| Edgewood | Clayton |
| Elberon | Tama |
| Eldon | Wapello |
| Eldora | Hardin |
| Eldridge | Scott |
| Elgin | Fayette |
| Elk Horn | Shelby |
| Elk Run Heights | Black Hawk |
| Elkader | Clayton |
| Elkhart | Polk |
| Elkport (Extinct) | Clayton |
| Elliott | Montgomery |
| Ellston | Ringgold |
| Ellsworth | Hamilton |
| Elma | Howard |
| Ely | Linn |
| Emerson | Mills |
| Emmetsburg | Palo Alto |
| Epworth | Dubuque |
| Essex | Page |
| Estherville | Emmet |
| Evansdale | Black Hawk |
| Everly | Clay |
| Exira | Audubon |
| Exline | Appanoose |
| Fairbank | Buchanan |
| Fairbank | Fayette |
| Fairfax | Linn |
| Fairfield | Jefferson |
| Fairport | Muscatine |
| Farley | Dubuque |
| Farmersburg | Clayton |
| Farmington | Van Buren |
| Farnhamville | Calhoun |
| Farragut | Fremont |
| Fayette | Fayette |
| Fenton | Kossuth |
| Ferguson | Marshall |
| Fertile | Worth |
| Finchford (Unincorporated) | Black Hawk |
| Fletcher Township | Sac |
| Florenceville (unincorporated) | Howard |
| Floris | Davis |
| Floyd | Floyd |
| Fonda | Pocahontas |
| Fontanelle | Adair |
| Forest City | Winnebago |
| Forest City (part) | Hancock |
| Forsyth | Emmet |
| Fort Atkinson | Winneshiek |
| Fort Dodge | Webster |
| Fort Madison | Lee |
| Fostoria | Clay |
| Four Corners | Jefferson |
| Franklin | Lee |
| Fraser | Boone |
| Fredericksburg | Chickasaw |
| Frederika | Bremer |
| Fredonia | Louisa |
| Fremont | Mahaska |
| Fruitland | Muscatine |
| Galesburg | Jasper |
| Galt | Wright |
| Galva | Ida |
| Ganbril | Scott |
| Garber | Clayton |
| Garden City (Unincorporated) | Hardin |
| Garden Grove | Decatur |
| Garnavillo | Clayton |
| Garner | Hancock |
| Garrison | Benton |
| Garwin | Tama |
| Geneva | Franklin |
| Genoa Bluff | Iowa |
| George | Lyon |
| Gibson | Keokuk |
| Gifford (Unincorporated) | Hardin |
| Gilbert | Story |
| Gilbertville | Black Hawk |
| Gillett Grove | Clay |
| Gilman | Marshall |
| Gilmore City | Humboldt |
| Gilmore City | Pocahontas |
| Gladbrook | Tama |
| Glasgow | Jefferson |
| Glasgow (Unincorporated) | Black Hawk |
| Glenwood | Mills |
| Glidden | Carroll |
| Goddard | Jasper |
| Goldfield | Wright |
| Goodell | Hancock |
| Goose Lake | Clinton |
| Gowrie | Webster |
| Graettinger | Palo Alto |
| Graf | Dubuque |
| Grafton | Worth |
| Grand Junction | Greene |
| Grand Mound | Clinton |
| Grand River | Decatur |
| Grandview | Louisa |
| Granger | Dallas |
| Granite | Lyon |
| Grant | Montgomery |
| Granville | Sioux |
| Gravity | Taylor |
| Gray | Audubon |
| Greeley | Delaware |
| Green Castle | Jasper |
| Green Mountian | Marshall |
| Greene | Butler |
| Greenfield | Adair |
| Greenville | Clay |
| Gridley | Emmet |
| Grimes (part) | Dallas |
| Grinnell | Poweshiek |
| Griswold | Cass |
| Grundy Center | Grundy |
| Gruver | Emmet |
| Guernsey | Poweshiek |
| Guthrie Center | Guthrie |
| Guttenberg | Clayton |
| Halbur | Carroll |
| Halfa | Emmet |
| Hamburg | Fremont |
| Hamilton | Marion |
| Hampton | Franklin |
| Hancock | Pottawattamie |
| Hanlontown | Worth |
| Hansell | Franklin |
| Harcourt | Webster |
| Hardy | Humboldt |
| Harlan | Shelby |
| Harper | Keokuk |
| Harpers Ferry | Allamakee |
| Harris | Osceola |
| Hartford | Warren |
| Hartley | O'Brien |
| Hartwick | Poweshiek |
| Harvey | Marion |
| Hastings | Mills |
| Havelock | Pocahontas |
| Haverhill | Marshall |
| Hawarden | Sioux |
| Hawkeye | Fayette |
| Hawkeye Point | Osceola |
| Hayesville | Keokuk |
| Hedrick | Keokuk |
| Henderson | Mills |
| Hepburn | Page |
| Hiawatha | Linn |
| Hills | Johnson |
| Hillsboro | Henry |
| Hinton | Plymouth |
| Holland | Grundy |
| Holstein | Ida |
| Holy Cross | Dubuque |
| Hopkinton | Delaware |
| Hoprig | Emmet |
| Hornick | Woodbury |
| Hospers | Sioux |
| Houghton | Lee |
| Hubbard | Hardin |
| Hudson | Black Hawk |
| Hull | Sioux |
| Humboldt | Humboldt |
| Humeston | Wayne |
| Huntington | Emmet |
| Huxley | Story |
| Ida Grove | Ida |
| Imogene | Fremont |
| Independence | Buchanan |
| Indianola | Warren |
| Inwood | Lyon |
| Ionia | Chickasaw |
| Iowa City | Johnson |
| Iowa Falls | Hardin |
| Ira | Jasper |
| Ireton | Sioux |
| Irwin | Shelby |
| Island City | Scott |
| Jackson Junction | Winneshiek |
| Jamaica | Guthrie |
| Janesville | Black Hawk |
| Janesville (part) | Bremer |
| Jefferson | Greene |
| Jesup | Black Hawk |
| Jesup | Buchanan |
| Jewell Junction | Hamilton |
| Johnston | Polk |
| Joice | Worth |
| Jolley | Calhoun |
| Jordan | Boone |
| Kalona | Washington |
| Kamrar | Hamilton |
| Kanawha | Hancock |
| Kellerton | Ringgold |
| Kelley | Story |
| Kellogg | Jasper |
| Kensett | Worth |
| Kent | Union |
| Keokuk | Lee |
| Keomah Village | Mahaska |
| Keosauqua | Van Buren |
| Keota | Keokuk |
| Keswick | Keokuk |
| Keystone | Benton |
| Killduff | Jasper |
| Kimballton | Audubon |
| Kingsley | Plymouth |
| Kinross | Keokuk |
| Kirkman | Shelby |
| Kirkville | Wapello |
| Kiron | Crawford |
| Klemme | Hancock |
| Klondike | Lyon |
| Knierim | Calhoun |
| Knoxville | Marion |
| La Motte | Jackson |
| La Porte City | Black Hawk |
| Lacona | Warren |
| Ladora | Iowa |
| Lake City | Calhoun |
| Lake Mills | Winnebago |
| Lake Park | Dickinson |
| Lake View | Sac |
| Lakeside | Buena Vista |
| Lakota | Kossuth |
| Lambs Grove | Jasper |
| LaMoille | Marshall |
| Lamoni | Decatur |
| Lamont | Buchanan |
| Lanesboro | Carroll |
| Lansing | Allamakee |
| Larchwood | Lyon |
| Larrabee | Cherokee |
| Latimer | Franklin |
| Laurel | Marshall |
| Laurens | Pocahontas |
| Lawler | Chickasaw |
| Lawton | Woodbury |
| Le Claire | Scott |
| Le Grand | Marshall |
| Le Mars | Plymouth |
| Leando | Van Buren |
| Ledyard | Kossuth |
| Lehigh | Webster |
| Leighton | Mahaska |
| Leland | Winnebago |
| Lenox | Adams |
| Lenox | Taylor |
| Leon | Decatur |
| Lester | Lyon |
| Letts | Louisa |
| Lewis | Cass |
| Libertyville | Jefferson |
| Lidderdale | Carroll |
| Limby | Jefferson |
| Lime City | Cedar |
| Lime Springs | Howard |
| Lincoln | Tama |
| Linden | Dallas |
| Lineville | Wayne |
| Linn Grove | Buena Vista |
| Lisbon | Linn |
| Liscomb | Marshall |
| Little Rock | Lyon |
| Little Sioux | Harrison |
| Littleport | Clayton |
| Livermore | Humboldt |
| Lockridge | Jefferson |
| Logan | Harrison |
| Lohrville | Calhoun |
| Lone Rock | Kossuth |
| Lone Tree | Johnson |
| Long Grove | Scott |
| Lorimor | Union |
| Lost Nation | Clinton |
| Lovilia | Monroe |
| Low Moor | Clinton |
| Lowden | Cedar |
| Lu Verne | Humboldt |
| Luana | Clayton |
| Lucas | Lucas |
| Lurray (Historical) | Marshall |
| Luther | Boone |
| Luxemburg | Dubuque |
| Luzerne | Benton |
| Lynnville | Jasper |
| Lytton | Calhoun |
| Macedonia | Pottawattamie |
| Macksburg | Madison |
| Madrid | Boone |
| Magnolia | Harrison |
| Malcom | Poweshiek |
| Mallard | Palo Alto |
| Maloy | Ringgold |
| Malvern | Mills |
| Manchester | Delaware |
| Manilla | Crawford |
| Manly | Worth |
| Manning | Carroll |
| Manson | Calhoun |
| Maple Hill | Emmet |
| Mapleton | Monona |
| Maquoketa | Jackson |
| Marathon | Buena Vista |
| Marble Rock | Floyd |
| Marcus | Cherokee |
| Marengo | Iowa |
| Marietta (Historical) | Marshall |
| Marion | Linn |
| Marne | Cass |
| Marquette | Clayton |
| Marshalltown | Marshall |
| Martelle | Jones |
| Martensdale | Warren |
| Martinsburg | Keokuk |
| Marysville | Marion |
| Mason City | Cerro Gordo |
| Masonville | Delaware |
| Massena | Cass |
| Matlock | Sioux |
| Maurice | Sioux |
| Maxwell | Story |
| Maynard | Fayette |
| Maysville | Scott |
| Mc Causland | Scott |
| McCallsburg | Story |
| McClelland | Pottawattamie |
| McGregor | Clayton |
| McIntire | Mitchell |
| Mechanicsville | Cedar |
| Mediapolis | Des Moines |
| Melbourne | Marshall |
| Melcher-Dallas | Marion |
| Melrose | Monroe |
| Melvin | Osceola |
| Menlo | Guthrie |
| Meriden | Cherokee |
| Merrill | Plymouth |
| Meservey | Cerro Gordo |
| Metz | Jasper |
| Middletown | Des Moines |
| Miles | Jackson |
| Milford | Dickinson |
| Millersburg | Iowa |
| Millerton | Wayne |
| Millville | Clayton |
| Milo | Warren |
| Milton | Van Buren |
| Minburn | Dallas |
| Minden | Pottawattamie |
| Mineola (unincorporated) | Mills |
| Minerva (Historical) | Marshall |
| Mingo | Jasper |
| Missouri Valley | Harrison |
| Mitchell | Mitchell |
| Mitchville | Polk |
| Modale | Harrison |
| Moingona | Boone |
| Mondamin | Harrison |
| Monmouth | Jackson |
| Monnigers (Historical) | Marshall |
| Monona | Clayton |
| Monroe | Jasper |
| Montezuma | Poweshiek |
| Monticello | Jones |
| Montour | Tama |
| Montpelier | Muscatine |
| Montrose | Lee |
| Moorhead | Monona |
| Moorland | Webster |
| Moravia | Appanoose |
| Morley | Jones |
| Morning Sun | Louisa |
| Morrison | Grundy |
| Moscow | Muscatine |
| Moulton | Appanoose |
| Mount Auburn | Benton |
| Mount Ayr | Ringgold |
| Mount Joy | Scott |
| Mount Pleasant | Henry |
| Mount Sterling | Van Buren |
| Mount Union | Henry |
| Mount Vernon | Linn |
| Moville | Woodbury |
| Murphy | Jasper |
| Murray | Clarke |
| Muscatine | Muscatine |
| Mystic | Appanoose |
| Nashua | Chickasaw |
| Nemaha | Sac |
| Neola | Pottawattamie |
| Nevada | Story |
| New Albin | Allamakee |
| New Hampton | Chickasaw |
| New Hartford | Butler |
| New Liberty | Scott |
| New London | Henry |
| New Market | Taylor |
| New Providence | Hardin |
| New Sharon | Mahaska |
| New Vienna | Dubuque |
| New Virginia | Warren |
| Newburg | Jasper |
| Newell | Buena Vista |
| Newhall | Benton |
| Newton | Jasper |
| Nicholis | Muscatine |
| Nodaway | Adams |
| Nora Springs | Floyd |
| North Buena Vista | Clayton |
| North English | Iowa |
| North Liberty | Johnson |
| North Washington | Chickasaw |
| Northboro | Page |
| Northwood | Worth |
| Norwalk | Warren |
| Norway | Benton |
| Numa | Appanoose |
| Oakland | Pottawattamie |
| Oakland Acres | Jasper |
| Oakville | Louisa |
| Ocheyedan | Osceola |
| Odebolt | Sac |
| Oelwein | Fayette |
| Okoboji | Dickinson |
| Olds | Henry |
| Olin | Jones |
| Ollie | Keokuk |
| Onawa | Monona |
| Onslow | Jones |
| Orange City | Sioux |
| Orchard | Mitchell |
| Orient | Adair |
| Orleans | Dickinson |
| Osage | Mitchell |
| Osceola | Clarke |
| Oskaloosa | Mahaska |
| Ossian | Winneshiek |
| Osterdock | Clayton |
| Oswalt | Jasper |
| Otho | Webster |
| Otley (unincorporated) | Marion |
| Oto | Woodbury |
| Ottosen | Humboldt |
| Ottumwa | Wapello |
| Ottumwa Junction | Wapello |
| Owasa | Hardin |
| Oxford | Johnson |
| Oxford Junction | Jones |
| Oyens | Plymouth |
| Pacific Junction | Mills |
| Packwood | Jefferson |
| Palmer | Pocahontas |
| Palo | Linn |
| Panama | Shelby |
| Panora | Guthrie |
| Park View | Scott |
| Parkersburg | Butler |
| Parnell | Iowa |
| Paton | Greene |
| Patterson | Madison |
| Paullina | O'Brien |
| Pekin | Jefferson |
| Pella | Marion |
| Peosta | Dubuque |
| Perlee | Jefferson |
| Perry | Dallas |
| Persia | Harrison |
| Peterson | Clay |
| Phillips | Wapello |
| Pickwick | Wapello |
| Pierson | Woodbury |
| Pioneer | Humboldt |
| Pisgah | Harrison |
| Plain View | Scott |
| Plainfield | Bremer |
| Plano | Appanoose |
| Plato | Cedar |
| Pleasant Hill | Polk |
| Pleasant Plain | Jefferson |
| Pleasant Prairie | Muscatine |
| Pleasant Valley | Scott |
| Pleasanton | Decatur |
| Pleasantville | Marion |
| Plover | Pocahontas |
| Plymouth | Cerro Gordo |
| Pocahontas | Pocahontas |
| Polk City | Polk |
| Pomeroy | Calhoun |
| Popejoy | Franklin |
| Portsmouth | Shelby |
| Postville | Allamakee |
| Prairie City | Jasper |
| Prairiebell | Jasper |
| Prairieburg | Linn |
| Prescott | Adams |
| Preston | Jackson |
| Primghar | O'Brien |
| Promise City | Wayne |
| Protivin | Chickasaw |
| Pulaski | Davis |
| Quarry | Marshall |
| Quasqueton | Buchanan |
| Quimby | Cherokee |
| Radcliffe | Hardin |
| Rake | Winnebago |
| Raleigh | Emmet |
| Ralston | Carroll |
| Ralston | Greene |
| Randalia | Fayette |
| Randall | Hamilton |
| Randolph | Fremont |
| Rathbun | Appanoose |
| Raymond | Black Hawk |
| Readlyn | Bremer |
| Reasnor | Jasper |
| Red Oak | Montgomery |
| Redding | Ringgold |
| Redfield | Dallas |
| Reinbeck | Grundy |
| Rembrandt | Buena Vista |
| Remsen | Plymouth |
| Renwick | Humboldt |
| Rhodes | Marshall |
| Riceville | Howard |
| Richland | Keokuk |
| Rickardsville | Dubuque |
| Ricketts | Crawford |
| Ridgeway | Winneshiek |
| Rinard | Calhoun |
| Ringsted | Emmet |
| Rippey | Greene |
| Riverdale | Scott |
| Riverside | Washington |
| Riverton | Fremont |
| Robins | Linn |
| Rochester | Cedar |
| Rock Falls | Cerro Gordo |
| Rock Rapids | Lyon |
| Rock Valley | Sioux |
| Rockford | Floyd |
| Rockingham | Scott |
| Rockwell | Cerro Gordo |
| Rockwell City | Calhoun |
| Rodman | Palo Alto |
| Rodney | Monona |
| Roland | Story |
| Rolfe | Pocahontas |
| Rome | Henry |
| Rose Hill | Mahaska |
| Rossie | Clay |
| Rowan | Wright |
| Rowley | Buchanan |
| Royal | Clay |
| Rudd | Floyd |
| Runnells | Polk |
| Rushville | Jasper |
| Russell | Lucas |
| Ruthven | Palo Alto |
| Rutland | Humboldt |
| Rutledge | Wapello |
| Ryan | Delaware |
| Sabula | Jackson |
| Sac City | Sac |
| Sageville | Dubuque |
| Salem | Henry |
| Salina | Jefferson |
| Salix | Woodbury |
| Sanborn | O'Brien |
| Sandyville | Warren |
| Saylorville | Polk |
| Scarville | Winnebago |
| Schaller | Sac |
| Schleswig | Crawford |
| Scranton | Greene |
| Searsboro | Poweshiek |
| Selma | Van Buren |
| Sergeant Bluff | Woodbury |
| Severs | Jasper |
| Sewal | Wayne |
| Seymour | Wayne |
| Shamburgh | Page |
| Shannon City | Ringgold |
| Sharpsburg | Taylor |
| Sheffield | Franklin |
| Shelby | Shelby |
| Sheldon | O'Brien |
| Shell Rock | Butler |
| Shellsburg | Benton |
| Shenandoah | Page |
| Shenandoah (part) | Fremont |
| Sherrill | Dubuque |
| Shueyville | Johnson |
| Sibley | Osceola |
| Sidney | Fremont |
| Sigourney | Keokuk |
| Silver City | Mills |
| Sioux Center | Sioux |
| Sioux City | Woodbury |
| Sioux Rapids | Buena Vista |
| Slater | Story |
| Sloan | Woodbury |
| Smithland | Woodbury |
| Soldier | Monona |
| Solon | Johnson |
| Somers | Calhoun |
| South English | Keokuk |
| Spencer | Clay |
| Spillville | Winneshiek |
| Spirit Lake | Dickinson |
| Spragueville | Jackson |
| Spring Hill | Warren |
| Springbrook | Jackson |
| Springdale | Cedar |
| Springville | Linn |
| St. Ansgar | Mitchell |
| St. Anthony | Marshall |
| St. Charles | Madison |
| St. Donatus | Jackson |
| St. Lucas | Fayette |
| St. Marys | Warren |
| St. Olaf | Clayton |
| St. Paul | Lee |
| Stacyville | Mitchell |
| Stanhope | Hamilton |
| Stanley | Fayette |
| Stanton | Montgomery |
| Stanwood | Cedar |
| State Center | Marshall |
| Steamboat Rock | Hardin |
| Stockport | Van Buren |
| Stockton | Muscatine |
| Storm Lake | Buena Vista |
| Story City | Story |
| Stout | Grundy |
| Stratford | Hamilton |
| Strawberry Point | Clayton |
| Struble | Plymouth |
| Stuart | Adair |
| Sully | Jasper |
| Sumner | Bremer |
| Sunbury | Cedar |
| Superior | Dickinson |
| Sutherland | O'Brien |
| Swaledale | Cerro Gordo |
| Swan | Marion |
| Swea City | Kossuth |
| Swisher | Johnson |
| Tabor | Fremont |
| Tama | Tama |
| Templeton | Carroll |
| Tennant | Shelby |
| Terril | Dickinson |
| Thayer | Union |
| Thompson | Winnebago |
| Thor | Humboldt |
| Thornburg | Keokuk |
| Thornton | Cerro Gordo |
| Thurman | Fremont |
| Tiffin | Johnson |
| Tingley | Ringgold |
| Tipton | Cedar |
| Titonka | Kossuth |
| Toledo | Tama |
| Toronto | Clinton |
| Tracy | Marion |
| Traer | Tama |
| Treynor | Pottawattamie |
| Tripoli | Bremer |
| Truesdale | Buena Vista |
| Truro | Madison |
| Turin | Monona |
| Turner (historical) | Jasper |
| Udell | Appanoose |
| Underwood | Pottawattamie |
| Union | Hardin |
| Unionville | Appanoose |
| University Heights | Johnson |
| University Park | Mahaska |
| Urbana | Benton |
| Urbandale | Polk |
| Urbandale (part) | Dallas |
| Ute | Monona |
| Vail | Crawford |
| Valeria | Jasper |
| Van Horne | Benton |
| Van Meter | Dallas |
| Van Wert | Decatur |
| Vandalia | Jasper |
| Varina | Pocahontas |
| Vedic City | Jefferson |
| Ventura | Cerro Gordo |
| Victor | Iowa |
| Villisca | Montgomery |
| Vincent | Webster |
| Vining | Tama |
| Vinton | Benton |
| Volga | Clayton |
| Voorhies (Unincorporated) | Black Hawk |
| Wadena | Fayette |
| Wahpeton | Dickinson |
| Walcott | Scott |
| Wald | Cedar |
| Walford | Benton |
| Walker | Linn |
| Wall Lake | Sac |
| Wallingford | Emmet |
| Walnut | Pottawattamie |
| Walnut Grove | Scott |
| Wapello | Louisa |
| Washburn (Unincorporated) | Black Hawk |
| Washington | Washington |
| Washta | Cherokee |
| Waterloo | Black Hawk |
| Waterville | Allamakee |
| Waucoma | Fayette |
| Waukee | Dallas |
| Waukon | Allamakee |
| Waverly | Bremer |
| Wayland | Henry |
| Webb | Clay |
| Webster | Keokuk |
| Webster City | Hamilton |
| Weldon | Clarke |
| Weldon | Decatur |
| Wellman | Washington |
| Wellsburg | Grundy |
| Welton | Clinton |
| Wesley | Kossuth |
| West Bend | Kossuth |
| West Bend | Palo Alto |
| West Branch | Cedar |
| West Burlington | Des Moines |
| West Chester | Washington |
| West Des Moines | Polk |
| West Des Moines (part) | Dallas |
| West Liberty | Muscatine |
| West Okoboji | Dickinson |
| West Point | Lee |
| West Union | Fayette |
| Westfield | Plymouth |
| Westgate | Fayette |
| Westphalia | Shelby |
| Westside | Crawford |
| Westwood | Henry |
| What Cheer | Keokuk |
| Wheatland | Clinton |
| Whiting | Monona |
| Whittemore | Kossuth |
| Whitten | Hardin |
| Willey | Carroll |
| Williams | Hamilton |
| Williamsburg | Iowa |
| Williamson | Lucas |
| Wilson (historical) | Jasper |
| Wilton | Cedar |
| Wilton | Muscatine |
| Windsor Heights | Polk |
| Winfield | Henry |
| Winterset | Madison |
| Winthrop | Buchanan |
| Wiota | Cass |
| Woden | Hancock |
| Woodbine | Harrison |
| Woodburn | Clarke |
| Woodward | Dallas |
| Woolstock | Wright |
| Worthington | Dubuque |
| Wyoming | Jones |
| Yale | Guthrie |
| Yetter | Calhoun |
| Yorktown | Page |
| Zearing | Story |
| Zwingle | Dubuque |
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