612
- 61201 Rock Island
- 61230 Albany
- 61231 Aledo
- 61232 Andalusia
- 61234 Annawan
- 61235 Atkinson
- 61236 Barstow
- 61238 Cambridge
- 61239 Carbon Cliff
- 61240 Coal Valley
- 61241 Colona
- 61242 Cordova
- 61243 Deer Grove
- 61244 East Moline
- 61250 Erie
- 61251 Fenton
- 61252 Fulton
- 61254 Geneseo
- 61256 Hampton
- 61257 Hillsdale
- 61258 Hooppole
- 61259 Illinois City
- 61260 Joy
- 61261 Lyndon
- 61262 Lynn Center
- 61263 Matherville
- 61264 Milan
- 61265 Moline
- 61270 Morrison
- 61272 New Boston
- 61273 Orion
- 61274 Osco
- 61275 Port Byron
- 61276 Preemption
- 61277 Prophetstown
- 61278 Rapids City
- 61279 Reynolds
- 61281 Sherrard
- 61282 Silvis
- 61283 Tampico
- 61284 Taylor Ridge
- 61285 Thomson