There are 27 zip codes in Lake County, Indiana. The most populated is 46307, located in Crown Point. * 2024 populations estimated based on the latest ACS 5-year data.
Zip Code | Population | City |
|---|---|---|
| 46307 | 71,355 | Crown Point |
| 46410 | 39,121 | Merrillville |
| 46342 | 32,049 | Hobart |
| 46312 | 26,363 | East Chicago |
| 46322 | 23,794 | Highland |
| 46375 | 23,740 | Schererville |
| 46321 | 23,731 | Munster |
| 46323 | 23,447 | Hammond |
| 46311 | 23,074 | Dyer |
| 46324 | 21,703 | Hammond |
| 46356 | 18,814 | Lowell |
| 46373 | 17,741 | Saint John |
| 46319 | 17,626 | Griffith |
| 46303 | 16,859 | Cedar Lake |
| 46404 | 16,851 | Gary |
| 46408 | 15,368 | Gary |
| 46320 | 13,822 | Hammond |
| 46394 | 12,117 | Whiting |
| 46405 | 11,547 | Lake Station |
| 46403 | 10,875 | Gary |
| 46327 | 10,875 | Hammond |
| 46407 | 9,125 | Gary |
| 46406 | 8,730 | Gary |
| 46409 | 7,050 | Gary |
| 46402 | 5,873 | Gary |
| 46376 | 204 | Schneider |
| 46377 | 66 | Shelby |