Iowa
| Zip Code | City |
|---|---|
| 51001 | Akron |
| 51003 | Alton |
| 51230 | Alvord |
| 51004 | Anthon |
| 51231 | Archer |
| 51331 | Arnolds Park |
| 51232 | Ashton |
| 51005 | Aurelia |
| 51234 | Boyden |
| 51007 | Bronson |
| 51008 | Brunsville |
| 51009 | Calumet |
| 51011 | Chatsworth |
| 51012 | Cherokee |
| 51014 | Cleghorn |
| 51015 | Climbing Hill |
| 51016 | Correctionville |
| 51018 | Cushing |
| 51019 | Danbury |
| 51333 | Dickens |
| 51235 | Doon |
| 51338 | Everly |
| 51340 | Fostoria |
| 51237 | George |
| 51341 | Gillett Grove |
| 51022 | Granville |
| 51343 | Greenville |
| 51345 | Harris |
| 51346 | Hartley |
| 51023 | Hawarden |
| 51024 | Hinton |
| 51026 | Hornick |
| 51238 | Hospers |
| 51239 | Hull |
| 51240 | Inwood |
| 51027 | Ireton |
| 51028 | Kingsley |
| 51347 | Lake Park |
| 51241 | Larchwood |
| 51029 | Larrabee |
| 51030 | Lawton |
| 51031 | Le Mars |
| 51242 | Lester |
| 51243 | Little Rock |
| 51035 | Marcus |
| 51244 | Matlock |
| 51036 | Maurice |
| 51350 | Melvin |
| 51037 | Meriden |
| 51038 | Merrill |
| 51351 | Milford |
| 51039 | Moville |
| 51354 | Ocheyedan |
| 51355 | Okoboji |
| 51041 | Orange City |
| 51044 | Oto |
| 51045 | Oyens |
| 51046 | Paullina |
| 51047 | Peterson |
| 51048 | Pierson |
| 51245 | Primghar |
| 51049 | Quimby |
| 51050 | Remsen |
| 51246 | Rock Rapids |
| 51247 | Rock Valley |
| 51357 | Royal |
| 51052 | Salix |
| 51248 | Sanborn |
| 51054 | Sergeant Bluff |
| 51201 | Sheldon |
| 51249 | Sibley |
| 51250 | Sioux Center |
| 51101 | Sioux City |
| 51102 | Sioux City |
| 51103 | Sioux City |
| 51104 | Sioux City |
| 51105 | Sioux City |
| 51106 | Sioux City |
| 51108 | Sioux City |
| 51109 | Sioux City |
| 51111 | Sioux City |
| 51055 | Sloan |
| 51056 | Smithland |
| 51301 | Spencer |
| 51360 | Spirit Lake |
| 51363 | Superior |
| 51058 | Sutherland |
| 51364 | Terril |
| 51061 | Washta |
| 51366 | Webb |
| 51062 | Westfield |
