Indiana Gazetteer > Indiana ZIP Codes > County ZIP Codes > Lake ZIP Codes

Also see: ZIP Codes in Lake with Associated Cities & Towns

ZIP Codes in Lake County with Associated Cities & Towns

Cedar Lake   46303
Crown Point   46307
Crown Point   46308
Dyer   46311
Dyer   46373
East Chicago   46312
Gary   46401
Gary   46402
Gary   46403
Gary   46404
Gary   46405
Gary   46406
Gary   46407
 Gary   46408
Gary   46409
Gary   46410
Gary   46411
Griffith   46319
Hammond   46320
Hammond   46321
Hammond   46322
Hammond   46323
Hammond   46324
Hammond   46325
Hammond   46327
Highland   46322
 Hobart   46342
Lake Station   46405
Leroy   46355
Lowell   46356
Merrillville   46410
Merrillville   46411
Munster   46321
New Chicago   46342
Saint John   46373
Schererville   46375
Schneider   46376
Shelby   46377
Whiting   46394

ZIP Codes - Key Concepts

  1. ZIP Codes are categories for grouping mailing addresses and are not exact geographic regions.
  2. The centroid of a ZIP Code may be in one County and the associated city/town in another.
  3. In rural areas, a single ZIP Code may be used for cities and towns in several different Counties.
  4. ZIP Code "areas" can overlap, be subsets of each other, or be artificial constructs with no geographic area.
  5. ZIP Codes are only loosely tied to cities.