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US ZIP Code Profile

ZIP Code 53172
South Milwaukee, Wisconsin

ZIP code 53172 is in South Milwaukee, located in Milwaukee County, Wisconsin, within the Milwaukee-Waukesha-West Allis metro area. Its 2020 Census population was 20,795. The estimated median adjusted gross income per tax return is $47,932, and about 2% of filers report $200,000 or more.

2020 Population
20,795
Census ZCTA
County
Milwaukee
FIPS 55079
Median income (est.)
$47,932
IRS SOI 2022
Land Area
4.829 mi²
+ 0.831 mi² water

01Location & Geography

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

Primary CitySouth Milwaukee, WI
CountyMilwaukee County (FIPS 55079)
StateWisconsin (FIPS 55)
Metro Area (MSA)Milwaukee-Waukesha-West Allis, WI Metro Area (33340)
Census Region / DivisionMidwest Region · East North Central Division
Coordinates42.912, -87.859665
Land / Water Area4.829 mi² land · 0.831 mi² water

02Income & Economics

Distribution of the 10,280 individual tax returns filed in 53172 by adjusted gross income bracket (IRS SOI, 2022).

< $25K
25.2%
$25K–$50K
27.0%
$50K–$75K
17.9%
$75K–$100K
12.1%
$100K–$200K
15.8%
$200K+
2.0%
The $200,000+ bracket accounts for 10% of 53172's total adjusted gross income, from 2% of returns — a concentration that drives the gap between the median ($47,932) 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 53172's IRS income metrics, 2020–2022.

Median income (2021→2022)
$47,932
▲ 5.5%
Filers earning $200K+
2.0%
▲ 0.4 pt
Total filers
10,280
▲ 0.2%
GET /zipc/v2/zipcodes/53172/soi?year=… $42K 2020 $45K 2021 $48K 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 53172 ZCTA.

2000
20,939
 
2010
21,156
▲ +1.0%
2020
20,795
▼ -1.7%

05Nearby ZIP Codes — Live Radius Search

Drag the slider to filter ZIP codes by distance from 53172. Powered by the same radius endpoint developers call from the API.

GET /zipc/v2/radius

ZIP codes within range of 53172

South Milwaukee and its immediate neighbors, sorted by distance.

3 mi
GET /zipc/v2/distance

Distance from 53172 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 TypePost Office
Carrier Route SortD
USPS Finance Number567720
City AliasesS Milwaukee, South Milwaukee

07Frequently Asked Questions

What county is ZIP code 53172 in?

ZIP code 53172 is in Milwaukee County, Wisconsin (county FIPS code 55079).

What city is ZIP code 53172?

The primary USPS city for 53172 is South Milwaukee, WI.

What metro area (MSA) is 53172 in?

53172 is part of the Milwaukee-Waukesha-West Allis, WI Metro Area (MSA code 33340).

What is the population of ZIP code 53172?

The 2020 Census population of 53172 was 20,795 residents.

What is the median income in ZIP code 53172?

Based on IRS Statistics of Income data, the estimated median adjusted gross income per tax return in 53172 is about $47,932, with around 2% of filers reporting $200,000 or more. Note that adjusted gross income is a tax measure and differs from U.S. Census household income.