ZIP Codes of Porter County, IN

Population & People
Population & People
Total Population
167,541
Household Income
Household Income
Median Income
$84,539
Housing
Housing
Total Housing Units
69,954
Business & Economy
Business & Economy
Total Businesses
3,655
Employment
Employment
Employment Rate
59.94%
Education
Education
Bachelor's Degree+
31.23%
Source: U.S. Census ACS 2024 5-Year Estimates · rolled up across the 10 ZIPs in this county.
Data Last Updated: June 1, 2026
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
Quick Link:
https://www.zip-codes.com/county/in-porter.asp
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Among Indiana's 10 most populous counties
#10 of 92 counties with 167,541 residents.

Standout ZIPs in this County


Most Populous
Valparaiso · 42,183 people
25.2% of county total
Highest Income
Valparaiso · $98,957 median
1.2× county average
Largest Land Area
Hebron · 95.9 sq mi
Spans the most ground
Fastest Growth
Chesterton · 15.4% (10-yr)
24,535 → 28,307 residents
Most Educated
Valparaiso · 37.7% bachelor's+
10,713 of 28,434 adults 25+

Things worth knowing about Porter County


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.

All ZIP Codes in Porter County


ZIPCityTypePopulationMedian IncomeArea (sq mi)10-yr Growth
46383ValparaisoStandard42,183$76,22488.66.4%
46385ValparaisoStandard40,856$98,95784.22.3%
46368PortageStandard40,301$76,36825.83.5%
46304ChestertonStandard28,307$91,32656.615.4%
46341HebronStandard10,048$89,55995.9-2.8%
46347KoutsStandard4,951$95,34870.73.1%
46301Beverly ShoresPO Box650$119,9483.417.5%
46393WheelerPO Box216$56,2500.28.5%
46302Boone GrovePO Box29$56,8750.1
46384ValparaisoPO Box0.0

Adjacent & Nearby Counties