Residential delivery area · Indiana
ZIP Code 46321: Munster, IN
ZIP code 46321 is in Munster, Indiana, entirely in Lake County (Census 2020 ZIP-county file). About 24,000 people live there (Census Bureau, ACS 2020-2024). Median household income is $110,187 (Census Bureau, ACS 2020-2024).
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Munster · its only residential ZIP
- County
- Lake County
- Census places
- Munster
- Metro area
- Chicago-Naperville-Elgin, IL-IN
- House district
- IN-1 119th Congress
- State
- Indiana
- Time zone
- Central
- Land area
- 7.6 sq mi · 3,125 people per sq mi
Where is ZIP code 46321?
46321 centers on 41.548°, -87.503° and covers 7.6 square miles of land plus 0.1 of water. It borders 6 ZIP codes: 46322, 46324, 60438, 46375, 60411, 46311.
The map draws ZIP code areas only. For the streets inside 46321, open its center on OpenStreetMap.
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries and the 2023 Gazetteer (2020 ZCTAs); ZIP-to-county shares, Census places and House districts (119th Congress) from the Census 2020 relationship files (shares of land); metro area from the OMB delineation (July 2023); town name and time zone from simplemaps US ZIP Codes (CC BY 4.0).
How does 46321 compare with the rest of Lake County?
| Measure | 46321 | In Lake County | In IN |
|---|---|---|---|
| People (ACS 2020-2024) | 23,733 | 6th of 28 | 97th of 807 |
| Median household income | $110k | 3rd of 26 | 29th of 478 |
| Median home value | $334k | 2nd of 25 | 29th of 509 |
Its median household income is higher than in 87% of U.S. residential ZIP codes, and it is denser than 89% of all U.S. residential ZIP codes. ZIP codes at the ACS caps ($250,000 or more for household income, $2,000,000 or more for home value) share the top rank.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B19013, B25077); ranks by PlainZIP over residential ZIP codes (ZCTAs).
How many people live in 46321?
The 2020 Census counted 23,894 people in 46321; the ACS, which samples households over 2020-2024, estimates 23,733. Between the 2010 and 2020 censuses its population grew 1.2% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 23,733
- 2020 Census count
- 23,894+1.2% since 2010 (23,603)
- Households
- 9,471
- Median age
- 45.0
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B01002, B11001); 2020 Census (DHC P1); 2010 Census (SF1 P1).
Who lives in 46321?
Of the 23,733 people the ACS estimates in 46321, 19.5% are under 18 and 20.7% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (69.6%), then Hispanic or Latino (14.5%).
- Under 1819.5%
- 18 to 6459.7%
- 65 and older20.7%
- White, not Hispanic69.6%
- Hispanic or Latino14.5%
- Black, not Hispanic7.4%
- Asian, not Hispanic6.3%
- Other or two or more2.2%
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01001 age by sex, B03002 Hispanic or Latino origin by race); shares of the estimated population, small ZIP codes carry wide margins.
What do households in 46321 earn?
Median household income is $110,187 (ACS 2020-2024), the 3rd highest of the 26 ranked ZIP codes in Lake County. It is not measurably different from 2015-2019 ($103,379 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $110,187±$11,660
- Income per person
- $57,382
- Below the poverty line
- 6.0%
- Unemployed (of the labor force)
- 5.5%
- Adults 25+ with a bachelor's degree
- 49.9%
- Adjusted gross income per tax return, 2022
- $116,67911,670 returns; wages 66% of AGI (IRS)
Source: U.S. Census Bureau, ACS 2020-2024 and 2015-2019 5-year estimates (B19013, B19301, B17001, B23025, B15003; 2015-2019 dollars converted with the BLS CPI-U, 1.22699); IRS Statistics of Income, ZIP code data, tax year 2022 (adjusted gross income per return, filed under the address on the return).
What are homes worth in 46321?
FHFA's house price index for 46321, built from repeat sales and appraisals of the same homes, rose 67% from 2015 to 2025 and rose 38% from 2020 to 2025, and moved +2.1% in 2025.
- Median home value (owners' estimate)
- $334,300
- Median gross rent
- $1,507
- Homes owned by their occupants
- 87.0%
- Housing units
- 9,814
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B25077, B25064, B25003, B25001); FHFA House Price Index, annual five-digit ZIP, updated 2026-03-31.
What businesses are in 46321?
689 business establishments had a location in this ZIP code in 2023, 5 fewer than in 2018; the most are in health care and social assistance (ZIP Code Business Patterns).
- Health care and social assistance207
- Accommodation and food services76
- Professional, scientific, and technical services73
- Other services (except public administration)64
- Retail trade54
- Finance and insurance44
Source: U.S. Census Bureau, ZIP Code Business Patterns 2023 and 2018 (establishments with paid employees, by the business's ZIP code).
Which ZIP codes are next to 46321?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 46322 | Highland | 23,680 | $78k | 2.4 mi |
| 46324 | Hammond | 21,409 | $63k | 2.5 mi |
| 60438 | Lansing, IL | 28,806 | $76k | 2.8 mi |
| 46375 | Schererville | 24,188 | $93k | 4.7 mi |
| 60411 | Chicago Heights, IL | 52,175 | $62k | 5.3 mi |
| 46311 | Dyer | 23,321 | $117k | 5.5 mi |
| 46323 | Hammond | 23,047 | $60k | 3.9 mi (near) |
| 46320 | Hammond | 14,353 | $37k | 4.3 mi (near) |
| 46319 | Griffith | 17,847 | $75k | 4.6 mi (near) |
| 60409 | Calumet City, IL | 35,100 | $55k | 5.2 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.