County ProfileIN
Lake County
Population: 498,700 · 32 ZIP codes
Demographics
Source: U.S. Census Bureau (ACS/Decennial). Estimates vary by year.
People
Total population
498,700
People
Median age
39.7
Housing
Total households
195,130
Income
Median household income
$71,493
Housing
Total housing units
217,436
Employment
Employment rate
57.3%
Education
Bachelor’s degree or higher
25.8%
Healthcare
Insured population
93.4%
County details
Local time 02:09:48(ET)| Name | Lake |
|---|---|
| Total ZIP codes | 32total |
| ZIP codes (by type) | 25 Standard7 PO Box |
| Area code | 219 |
| Timezone | Eastern Time (ET) |
| Coordinates | 41.472247, -87.3743368 |
| Land area | 498.9 sq miles(1,292.1 km²) |
Map of Lake county, Indiana with ZIP codes
Cities and Communities in Lake County
Compare the largest cities in Lake County by population, median income, and growth. Use the table below to analyze key demographic shifts across the region.
| City | Population | Median incomeHousehold | ZIP codes |
|---|---|---|---|
| Hammond | 77,879 | $55,504 | 5ZIPs |
| Gary | 69,093 | $38,731 | 8ZIPs |
| Merrillville | 36,444 | $67,587 | 2ZIPs |
| Crown Point | 33,899 | $101,686 | 2ZIPs |
| Hobart | 29,752 | $75,160 | 1ZIPs |
| Schererville | 29,646 | $89,466 | 1ZIPs |
| East Chicago | 26,370 | $42,125 | 1ZIPs |
| Highland | 23,984 | $78,062 | 1ZIPs |
| Munster | 23,894 | $110,187 | 1ZIPs |
| Saint John | 20,303 | $131,467 | 1ZIPs |
| Griffith | 16,528 | $76,636 | 1ZIPs |
| Dyer | 16,517 | $107,159 | 1ZIPs |
| Cedar Lake | 14,106 | $83,381 | 1ZIPs |
| Lake Station | 13,235 | $59,591 | 1ZIPs |
| Lowell | 10,680 | $84,024 | 1ZIPs |
| Whiting | 4,559 | $71,708 | 1ZIPs |
| Shelby | 453 | $32,180 | 1ZIPs |
| Schneider | 269 | $63,182 | 1ZIPs |
| Leroy | — | — | 1ZIPs |
— Data unavailable or suppressed by the U.S. Census Bureau for areas with small sample sizes to protect individual privacy.
ZIP Codes in Lake County
Review the most populated postal areas across Lake County. Use the ranking below to compare resident density and demographic scales between the county's major zones.
| ZIP | City | Median incomeHousehold | Population (ZIP) |
|---|---|---|---|
| 46307 | Crown Point | $107,800 | 69,248 |
| 46410 | Merrillville | $64,127 | 39,471 |
| 46342 | Hobart | $75,521 | 32,540 |
| 46312 | East Chicago | $42,125 | 26,370 |
| 46375 | Schererville | $93,160 | 24,051 |
| 46322 | Highland | $78,062 | 23,984 |
| 46321 | Munster | $110,187 | 23,894 |
| 46324 | Hammond | $63,052 | 22,611 |
| 46323 | Hammond | $59,688 | 22,510 |
| 46311 | Dyer | $116,652 | 22,431 |
| 46356 | Lowell | $89,217 | 18,668 |
| 46319 | Griffith | $74,662 | 18,108 |
| 46373 | Saint John | $127,146 | 17,839 |
| 46303 | Cedar Lake | $84,211 | 17,028 |
| 46404 | Gary | $42,256 | 15,658 |
| 46408 | Gary | $47,453 | 15,109 |
| 46320 | Hammond | $37,158 | 14,514 |
| 46405 | Lake Station | $60,881 | 11,860 |
| 46394 | Whiting | $66,176 | 11,725 |
| 46403 | Gary | $45,991 | 11,649 |
Data Sources & Citations
The geographic and demographic information presented on this site is compiled from publicly available, authoritative sources, including:
- United States Census BureauDemographic, population, housing, and socioeconomic data sourced from Census Bureau datasets, including the Decennial Census and the American Community Survey (ACS).Census Data
- United States Postal Service (USPS)ZIP code classifications, delivery types, and postal designations used for reference purposes. USPS ZIP codes are intended for mail delivery and may not always align exactly with Census geographic boundaries.USPS