515
- 51501 Council Bluffs
- 51503 Council Bluffs
- 51510 Carter Lake
- 51520 Arion
- 51521 Avoca
- 51523 Blencoe
- 51525 Carson
- 51526 Crescent
- 51527 Defiance
- 51528 Dow City
- 51529 Dunlap
- 51530 Earling
- 51531 Elk Horn
- 51532 Elliott
- 51533 Emerson
- 51534 Glenwood
- 51535 Griswold
- 51536 Hancock
- 51537 Harlan
- 51540 Hastings
- 51541 Henderson
- 51542 Honey Creek
- 51543 Kimballton
- 51544 Lewis
- 51545 Little Sioux
- 51546 Logan
- 51548 Mc Clelland
- 51549 Macedonia
- 51550 Magnolia
- 51551 Malvern
- 51552 Marne
- 51553 Minden
- 51554 Mineola
- 51555 Missouri Valley
- 51556 Modale
- 51557 Mondamin
- 51558 Moorhead
- 51559 Neola
- 51560 Oakland
- 51561 Pacific Junction
- 51562 Panama
- 51563 Persia
- 51564 Pisgah
- 51565 Portsmouth
- 51566 Red Oak
- 51570 Shelby
- 51571 Silver City
- 51572 Soldier
- 51573 Stanton
- 51575 Treynor
- 51576 Underwood
- 51577 Walnut
- 51578 Westphalia
- 51579 Woodbine