Get API Key →
US ZIP Code Profile

ZIP Code 53203
Milwaukee, Wisconsin

ZIP code 53203 is in Milwaukee, located in Milwaukee County, Wisconsin, within the Milwaukee-Waukesha-West Allis metro area. Its 2020 Census population was 2,180. The estimated median adjusted gross income per tax return is $57,721, and about 7% of filers report $200,000 or more.

2020 Population
2,180
Census ZCTA
County
Milwaukee
FIPS 55079
Median income (est.)
$57,721
IRS SOI 2022
Land Area
0.448 mi²
+ 0.024 mi² water

01Location & Geography

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

Primary CityMilwaukee, 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
Coordinates43.038097, -87.91673
Land / Water Area0.448 mi² land · 0.024 mi² water

02Income & Economics

Distribution of the 1,430 individual tax returns filed in 53203 by adjusted gross income bracket (IRS SOI, 2022).

< $25K
18.9%
$25K–$50K
23.8%
$50K–$75K
23.8%
$75K–$100K
11.9%
$100K–$200K
14.7%
$200K+
7.0%
The $200,000+ bracket accounts for 34% of 53203's total adjusted gross income, from 7% of returns — a concentration that drives the gap between the median ($57,721) 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 53203's IRS income metrics, 2020–2022.

Median income (2021→2022)
$57,721
▲ 14.5%
Filers earning $200K+
7.0%
▼ 0.6 pt
Total filers
1,430
▼ 1.4%
GET /zipc/v2/zipcodes/53203/soi?year=… $50K 2020 $50K 2021 $58K 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 53203 ZCTA.

2000
335
 
2010
938
▲ +180.0%
2020
2,180
▲ +132.4%

05Nearby ZIP Codes — Live Radius Search

Drag the slider to filter ZIP codes by distance from 53203. Powered by the same radius endpoint developers call from the API.

GET /zipc/v2/radius

ZIP codes within range of 53203

Milwaukee and its immediate neighbors, sorted by distance.

3 mi
GET /zipc/v2/distance

Distance from 53203 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 Number565480
City AliasesMilwaukee

07Frequently Asked Questions

What county is ZIP code 53203 in?

ZIP code 53203 is in Milwaukee County, Wisconsin (county FIPS code 55079).

What city is ZIP code 53203?

The primary USPS city for 53203 is Milwaukee, WI.

What metro area (MSA) is 53203 in?

53203 is part of the Milwaukee-Waukesha-West Allis, WI Metro Area (MSA code 33340).

What is the population of ZIP code 53203?

The 2020 Census population of 53203 was 2,180 residents.

What is the median income in ZIP code 53203?

Based on IRS Statistics of Income data, the estimated median adjusted gross income per tax return in 53203 is about $57,721, with around 7% of filers reporting $200,000 or more. Note that adjusted gross income is a tax measure and differs from U.S. Census household income.