Lake County, Indiana
27 ZIP codes · 498.89 sq mi of land · FIPS 18089
| Population | 500,379 |
|---|---|
| State | Indiana |
| FIPS code | 18089 |
| Time zone | Central |
| Land area | 498.89 sq mi |
| Center (lat, long) | 41.4722, -87.3743 |
Area codes in this area
These are the area codes that most often serve Lake County (including overlays). The exact area code depends on the phone number — landlines, mobiles and overlays can differ even on the same street.
Cities and towns (largest first)
Hammond · 76,768Gary · 68,113Merrillville · 36,476Crown Point · 34,393Schererville · 29,701Hobart · 29,558East Chicago · 26,022Munster · 23,733Highland · 23,680Dyer · 16,400Griffith · 16,273Cedar Lake · 15,295LowellSaint JohnSchneiderShelbyWhitingLake Station
ZIP codes in Lake County
46303 Cedar Lake46307 Crown Point46311 Dyer46312 East Chicago46319 Griffith46320 Hammond46321 Munster46322 Highland46323 Hammond46324 Hammond46327 Hammond46342 Hobart46356 Lowell46373 Saint John46375 Schererville46376 Schneider46377 Shelby46394 Whiting46402 Gary46403 Gary46404 Gary46405 Lake Station46406 Gary46407 Gary46408 Gary46409 Gary46410 Merrillville
Population: U.S. Census Bureau, ACS 5-year estimates, 2024.