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US ZIP Code Profile

ZIP Code 53045
Brookfield, Wisconsin

ZIP code 53045 is in Brookfield, located in Waukesha County, Wisconsin, within the Milwaukee-Waukesha-West Allis metro area. Its 2020 Census population was 23,651. The estimated median adjusted gross income per tax return is $91,295, and about 21% of filers report $200,000 or more.

2020 Population
23,651
Census ZCTA
County
Waukesha
FIPS 55133
Median income (est.)
$91,295
IRS SOI 2022
Land Area
14.376 mi²
+ 0.199 mi² water

01Location & Geography

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

Primary CityBrookfield, WI
CountyWaukesha County (FIPS 55133)
StateWisconsin (FIPS 55)
Metro Area (MSA)Milwaukee-Waukesha-West Allis, WI Metro Area (33340)
Census Region / DivisionMidwest Region · East North Central Division
Coordinates43.058887, -88.15252
Land / Water Area14.376 mi² land · 0.199 mi² water

02Income & Economics

Distribution of the 11,860 individual tax returns filed in 53045 by adjusted gross income bracket (IRS SOI, 2022).

< $25K
19.5%
$25K–$50K
13.2%
$50K–$75K
11.1%
$75K–$100K
9.4%
$100K–$200K
25.6%
$200K+
21.1%
The $200,000+ bracket accounts for 65% of 53045's total adjusted gross income, from 21% of returns — a concentration that drives the gap between the median ($91,295) 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 53045's IRS income metrics, 2020–2022.

Median income (2021→2022)
$91,295
▲ 4.3%
Filers earning $200K+
21.1%
▲ 0.4 pt
Total filers
11,860
▲ 1.2%
GET /zipc/v2/zipcodes/53045/soi?year=… $79K 2020 $88K 2021 $91K 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 53045 ZCTA.

2000
21,598
 
2010
21,686
▲ +0.4%
2020
23,651
▲ +9.1%

05Nearby ZIP Codes — Live Radius Search

Drag the slider to filter ZIP codes by distance from 53045. Powered by the same radius endpoint developers call from the API.

GET /zipc/v2/radius

ZIP codes within range of 53045

Brookfield and its immediate neighbors, sorted by distance.

3 mi
GET /zipc/v2/distance

Distance from 53045 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 Number561140
City AliasesBrookfield

07Frequently Asked Questions

What county is ZIP code 53045 in?

ZIP code 53045 is in Waukesha County, Wisconsin (county FIPS code 55133).

What city is ZIP code 53045?

The primary USPS city for 53045 is Brookfield, WI.

What metro area (MSA) is 53045 in?

53045 is part of the Milwaukee-Waukesha-West Allis, WI Metro Area (MSA code 33340).

What is the population of ZIP code 53045?

The 2020 Census population of 53045 was 23,651 residents.

What is the median income in ZIP code 53045?

Based on IRS Statistics of Income data, the estimated median adjusted gross income per tax return in 53045 is about $91,295, with around 21% of filers reporting $200,000 or more. Note that adjusted gross income is a tax measure and differs from U.S. Census household income.