| ZIP Codes: | 10 ZIP Codes (6 Standard, 4 PO Box, 0 Unique) [See All] |
| Area Code: | 219 |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 2:12:08 PM |
| Population: | 167,541 [See All] |
| FIPS: | 18127 |
| CBSA: | Chicago-Naperville-Elgin, IL-IN |
| Land Area: | 426 sq mi |
| Water Area: | 10 sq mi |
| Coordinates: | 41.4757, -87.0946 |
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167,541 residents live across 10 ZIPs covering 426 sq mi, served by 8 distinct USPS-recognized cities.
Population moved from 158,913 to 167,512 from 2014 to 2024 — a +5.4% change. 7 ZIPs gained residents, 1 lost.
The county's wealthiest ZIP 46385 (Valparaiso, $98,957 median) and poorest ZIP 46383 (Valparaiso, $76,224) are 7.5 miles apart — a 1.3× income gap across local geography.
Median home values vary 1.5× across this county — from $227,100 in 46368 (Portage) to $331,700 in 46385 (Valparaiso).
Density varies 22× across the county — from 70 people/sq mi in 46347 (Kouts) to 1,560 in 46368 (Portage).
Educational attainment ranges from 19.8% bachelor's+ in 46368 (Portage) to 37.7% in 46383 (Valparaiso) — the breadth of educational profiles across the area.
Within Indiana, this is the #10 most populous of 92 counties and ranks #12 for median household income with the #16 fastest decade growth .
Weighted by population, the typical household earns about $85,859 across the county — reflecting what a typical resident sees, not a simple ZIP average.
31.2% of adults age 25+ hold a bachelor's degree or higher (36,568 of 117,087 reporting). The most-educated ZIPs cluster around Valparaiso.
6 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 |
|---|---|---|---|---|---|---|
| 46383 | Valparaiso | Standard | 42,183 | $76,224 | 88.6 | 6.4% |
| 46385 | Valparaiso | Standard | 40,856 | $98,957 | 84.2 | 2.3% |
| 46368 | Portage | Standard | 40,301 | $76,368 | 25.8 | 3.5% |
| 46304 | Chesterton | Standard | 28,307 | $91,326 | 56.6 | 15.4% |
| 46341 | Hebron | Standard | 10,048 | $89,559 | 95.9 | -2.8% |
| 46347 | Kouts | Standard | 4,951 | $95,348 | 70.7 | 3.1% |
| 46301 | Beverly Shores | PO Box | 650 | $119,948 | 3.4 | 17.5% |
| 46393 | Wheeler | PO Box | 216 | $56,250 | 0.2 | 8.5% |
| 46302 | Boone Grove | PO Box | 29 | $56,875 | 0.1 | — |
| 46384 | Valparaiso | PO Box | — | — | 0.0 | — |