502
- 50201 Nevada
- 50206 New Providence
- 50207 New Sharon
- 50208 Newton
- 50210 New Virginia
- 50211 Norwalk
- 50212 Ogden
- 50213 Osceola
- 50214 Otley
- 50216 Panora
- 50217 Paton
- 50218 Patterson
- 50219 Pella
- 50220 Perry
- 50222 Peru
- 50223 Pilot Mound
- 50225 Pleasantville
- 50226 Polk City
- 50227 Popejoy
- 50228 Prairie City
- 50229 Prole
- 50230 Radcliffe
- 50231 Randall
- 50232 Reasnor
- 50233 Redfield
- 50234 Rhodes
- 50235 Rippey
- 50236 Roland
- 50237 Runnells
- 50238 Russell
- 50239 Saint Anthony
- 50240 Saint Charles
- 50242 Searsboro
- 50243 Sheldahl
- 50244 Slater
- 50246 Stanhope
- 50247 State Center
- 50248 Story City
- 50249 Stratford
- 50250 Stuart
- 50251 Sully
- 50252 Swan
- 50254 Thayer
- 50255 Thornburg
- 50256 Tracy
- 50257 Truro
- 50258 Union
- 50261 Van Meter
- 50262 Van Wert
- 50263 Waukee
- 50264 Weldon
- 50265 West Des Moines
- 50266 West des Moines
- 50268 What Cheer
- 50271 Williams
- 50272 Williamson
- 50273 Winterset
- 50274 Wiota
- 50275 Woodburn
- 50276 Woodward
- 50277 Yale
- 50278 Zearing