City
- Beverly Shores
- Cedar Lake
- Chesterton
- Crown Point
- Demotte
- Dyer
- East Chicago
- Gary
- Griffith
- Hammond
- Hebron
- Highland
- Hobart
- Knox
- La Porte
- Laporte
- Lowell
- Merrillville
- Michiana Shores
- Michigan City
- Monticello
- Munster
- North Judson
- Portage
- Rensselaer
- Schererville
- St. John
- St John
- Valparaiso
- Wheatfield
- Whiting
County
Zip Code
- 45634
- 46301
- 46303
- 46303-7050
- 46304
- 46307
- 46310
- 46311
- 46312
- 46319
- 46320
- 46321
- 46322
- 46324
- 46327
- 46341
- 46342
- 46350
- 46356
- 46360
- 46366
- 46368
- 46373
- 46375
- 46376
- 46383
- 46385
- 46392
- 46394
- 46403
- 46404
- 46407
- 46408
- 46409
- 46410
- 47978
- 61856
- 99999