Get API Key →
US ZIP Code Profile

ZIP Code 46321
Munster, Indiana

ZIP code 46321 is in Munster, located in Lake County, Indiana, within the Chicago-Naperville-Elgin metro area. Its 2020 Census population was 23,894. The estimated median adjusted gross income per tax return is $74,384, and about 13% of filers report $200,000 or more.

2020 Population
23,894
Census ZCTA
County
Lake
FIPS 18089
Median income (est.)
$74,384
IRS SOI 2022
Land Area
7.534 mi²
+ 0.093 mi² water

01Location & Geography

Authoritative geographic identifiers from the U.S. Census Bureau, ANSI, and FIPS standards.

Primary CityMunster, IN
CountyLake County (FIPS 18089)
StateIndiana (FIPS 18)
Metro Area (MSA)Chicago-Naperville-Elgin, IL-IN-WI Metro Area (16980)
Census Region / DivisionMidwest Region · East North Central Division
Coordinates41.54691, -87.504585
Land / Water Area7.534 mi² land · 0.093 mi² water

02Income & Economics

Distribution of the 11,670 individual tax returns filed in 46321 by adjusted gross income bracket (IRS SOI, 2022).

< $25K
23.0%
$25K–$50K
15.2%
$50K–$75K
12.2%
$75K–$100K
11.4%
$100K–$200K
25.0%
$200K+
13.3%
The $200,000+ bracket accounts for 48% of 46321's total adjusted gross income, from 13% of returns — a concentration that drives the gap between the median ($74,384) and the average.
Estimated median = median adjusted gross income per tax return, interpolated from IRS SOI brackets. Differs from U.S. Census household income.

03Income Over Time

Year-over-year change in 46321's IRS income metrics, 2020–2022.

Median income (2021→2022)
$74,384
▲ 4.9%
Filers earning $200K+
13.3%
▲ 1.2 pt
Total filers
11,670
▲ 0.3%
GET /zipc/v2/zipcodes/46321/soi?year=… $65K 2020 $71K 2021 $74K 2022
Median = adjusted gross income per return, interpolated from IRS SOI brackets. Figures are nominal (not inflation-adjusted).

04Population Trend

Decennial U.S. Census population for the 46321 ZCTA.

2000
21,511
 
2010
23,603
▲ +9.7%
2020
23,894
▲ +1.2%

05Nearby ZIP Codes — Live Radius Search

Drag the slider to filter ZIP codes by distance from 46321. Powered by the same radius endpoint developers call from the API.

GET /zipc/v2/radius

ZIP codes within range of 46321

Munster and its immediate neighbors, sorted by distance.

3 mi
GET /zipc/v2/distance

Distance from 46321 to any ZIP

Enter a 5-digit ZIP to calculate the distance.

06USPS Postal Details

Delivery and facility attributes from the monthly USPS dataset.

ZIP ClassificationNon-Unique Zip
Facility TypeBranch
Carrier Route SortD
USPS Finance Number173586
City AliasesHammond, Munster

07Frequently Asked Questions

What county is ZIP code 46321 in?

ZIP code 46321 is in Lake County, Indiana (county FIPS code 18089).

What city is ZIP code 46321?

The primary USPS city for 46321 is Munster, IN.

What metro area (MSA) is 46321 in?

46321 is part of the Chicago-Naperville-Elgin, IL-IN-WI Metro Area (MSA code 16980).

What is the population of ZIP code 46321?

The 2020 Census population of 46321 was 23,894 residents.

What is the median income in ZIP code 46321?

Based on IRS Statistics of Income data, the estimated median adjusted gross income per tax return in 46321 is about $74,384, with around 13% of filers reporting $200,000 or more. Note that adjusted gross income is a tax measure and differs from U.S. Census household income.