| ZIP Codes: | 13 ZIP Codes (9 Standard, 4 PO Box, 0 Unique) [See All] |
| Area Codes: | 219 / 574 |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 11:53:25 PM |
| Population: | 110,508 [See All] |
| FIPS: | 18091 |
| CBSA: | Michigan City-La Porte, IN |
| Land Area: | 553 sq mi |
| Water Area: | 6 sq mi |
| Coordinates: | 41.5401, -86.7681 |
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110,508 residents live across 13 ZIPs covering 553 sq mi, served by 11 distinct USPS-recognized cities.
Population moved from 110,707 to 110,508 from 2014 to 2024 — a -0.2% change. 5 ZIPs gained residents, 6 lost.
The county's wealthiest ZIP 46371 (Rolling Prairie, $99,830 median) and poorest ZIP 46346 (Kingsford Heights, $57,830) are 14.7 miles apart — a 1.7× income gap across local geography.
Median home values vary 2.1× across this county — from $120,500 in 46346 (Kingsford Heights) to $256,000 in 46371 (Rolling Prairie).
Density varies 56× across the county — from 25 people/sq mi in 46348 (La Crosse) to 1,387 in 46346 (Kingsford Heights).
Educational attainment ranges from 7.3% bachelor's+ in 46346 (Kingsford Heights) to 34.1% in 46365 (Mill Creek) — the breadth of educational profiles across the area.
Within Indiana, this is the #16 most populous of 92 counties and ranks #29 for median household income .
Weighted by population, the typical household earns about $70,148 across the county — reflecting what a typical resident sees, not a simple ZIP average.
22.6% of adults age 25+ hold a bachelor's degree or higher (17,718 of 78,532 reporting).
9 Standard delivery, 4 PO Box only, 0 single-entity Unique ZIPs serve this county.
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 46350 | La Porte | Standard | 44,763 | $74,307 | 193.4 | 4.1% |
| 46360 | Michigan City | Standard | 43,817 | $59,266 | 77.4 | 0.5% |
| 46391 | Westville | Standard | 8,986 | $82,692 | 39.9 | -14.9% |
| 46371 | Rolling Prairie | Standard | 3,396 | $99,830 | 38.1 | -13.9% |
| 46390 | Wanatah | Standard | 2,554 | $87,639 | 50.1 | 0.8% |
| 46382 | Union Mills | Standard | 1,835 | $95,208 | 47.9 | -11.4% |
| 46340 | Hanna | Standard | 1,524 | $58,717 | 33.3 | 67.7% |
| 46346 | Kingsford Heights | PO Box | 1,358 | $57,830 | 1.0 | -12.8% |
| 46348 | La Crosse | Standard | 1,217 | $64,375 | 49.4 | 7.6% |
| 46365 | Mill Creek | Standard | 992 | $98,047 | 23.0 | -0.9% |
| 46345 | Kingsbury | PO Box | 66 | — | 0.0 | -82.8% |
| 46352 | La Porte | PO Box | — | — | 0.0 | — |
| 46361 | Michigan City | PO Box | — | — | 0.0 | — |