Lake County, Indiana ZIP Codes
- ZIP records
27 - Cities represented
18 - Sum of listed ZIP population estimates
504,725
Population sum includes positive estimates in these ZIP records; it is not an official county population.
Top ZIP Codes by Population
| Rank | ZIP Code | City | Population estimate |
|---|---|---|---|
| 1 | 46307 | Crown Point | 71,673 |
| 2 | 46410 | Merrillville | 39,243 |
| 3 | 46342 | Hobart | 32,224 |
| 4 | 46312 | East Chicago | 26,022 |
| 5 | 46375 | Schererville | 24,188 |
| 6 | 46321 | Munster | 23,733 |
| 7 | 46322 | Highland | 23,680 |
| 8 | 46311 | Dyer | 23,321 |
| 9 | 46323 | Hammond | 23,047 |
| 10 | 46324 | Hammond | 21,409 |
Cities in Lake County
- Cedar Lake
- Crown Point
- Dyer
- East Chicago
- Gary
- Griffith
- Hammond
- Highland
- Hobart
- Lake Station
- Lowell
- Merrillville
- Munster
- Saint John
- Schererville
- Schneider
- Shelby
- Whiting
ZIP Directory
- ZIP 46303
- ZIP 46307
- ZIP 46311
- ZIP 46312
- ZIP 46319
- ZIP 46320
- ZIP 46321
- ZIP 46322
- ZIP 46323
- ZIP 46324
- ZIP 46327
- ZIP 46342
- ZIP 46356
- ZIP 46373
- ZIP 46375
- ZIP 46376
- ZIP 46377
- ZIP 46394
- ZIP 46402
- ZIP 46403
- ZIP 46404
- ZIP 46405
- ZIP 46406
- ZIP 46407
- ZIP 46408
- ZIP 46409
- ZIP 46410
Browse all ZIP data for Indiana
Methodology: Records are grouped by the source file's listed county and state. Population sums add positive ZIP-level estimates and are not official county totals; city counts use distinct city labels in the source.