Lake County ZIP Codes
Indiana, United States · 32 codes
Lake County in Indiana has 32 ZIP codes, from 46303 to 46411, serving 32 places.
ZIP codes in Lake
| ZIP Code | Places |
|---|---|
| 46303 | Cedar Lake |
| 46307 | Crown Point |
| 46308 | Crown Point |
| 46311 | Dyer |
| 46312 | East Chicago |
| 46319 | Griffith |
| 46320 | Hammond |
| 46321 | Munster |
| 46322 | Highland |
| 46323 | Hammond |
| 46324 | Hammond |
| 46325 | Hammond |
| 46327 | Hammond |
| 46342 | Hobart |
| 46355 | Leroy |
| 46356 | Lowell |
| 46373 | Saint John |
| 46375 | Schererville |
| 46376 | Schneider |
| 46377 | Shelby |
| 46394 | Whiting |
| 46401 | Gary |
| 46402 | Gary |
| 46403 | Gary |
| 46404 | Gary |
| 46405 | Lake Station |
| 46406 | Gary |
| 46407 | Gary |
| 46408 | Gary |
| 46409 | Gary |
| 46410 | Merrillville |
| 46411 | Merrillville |
Frequently asked questions
What is the ZIP code of Lake?
Lake has 32 ZIP codes, from 46303 to 46411. The table lists the places each one serves.
How many places are listed in Lake County?
32 places.
Source: GeoNames postal codes (CC BY 4.0), geonames.org, retrieved 2026-10-22. Place coordinates are approximate. Check with the national postal service before sending anything valuable.