Residential delivery area · Wisconsin
ZIP Code 53103: Big Bend, WI
ZIP code 53103 uses the postal name Big Bend, Wisconsin and lies entirely in Waukesha County (Census 2020 ZIP-county file). About 3,800 people live there (Census Bureau, ACS 2020-2024). Median household income is $137,083 (Census Bureau, ACS 2020-2024). By Census place, 22% of its land lies in Big Bend; 78% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Big Bend · its only residential ZIP
- County
- Waukesha County
- Census places
- Big Bend
- Metro area
- Milwaukee-Waukesha, WI
- House district
- WI-5 119th Congress
- State
- Wisconsin
- Time zone
- Central
- Land area
- 12.2 sq mi · 309 people per sq mi
Where is ZIP code 53103?
53103 centers on 42.881°, -88.217° and covers 12.2 square miles of land plus 0.5 of water. It borders 4 ZIP codes: 53150, 53185, 53189, 53149.
The map draws ZIP code areas only. For the streets inside 53103, 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 53103 compare with the rest of Waukesha County?
| Measure | 53103 | In Waukesha County | In WI |
|---|---|---|---|
| People (ACS 2020-2024) | 3,762 | 21st of 29 | 327th of 783 |
| Median household income | $137k | 4th of 26 | 4th of 610 |
| Median home value | $398k | 17th of 26 | 47th of 612 |
Its median household income is higher than in 94% of U.S. residential ZIP codes, and it is denser than 67% 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 53103?
The 2020 Census counted 3,833 people in 53103; the ACS, which samples households over 2020-2024, estimates 3,762. Between the 2010 and 2020 censuses its population grew 2.9% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 3,762±453 (90% margin)
- 2020 Census count
- 3,833+2.9% since 2010 (3,724)
- Households
- 1,561
- Median age
- 49.0
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 53103?
Of the 3,762 people the ACS estimates in 53103, 20.5% are under 18 and 25.0% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (91.2%).
- Under 1820.5%
- 18 to 6454.5%
- 65 and older25.0%
- White, not Hispanic91.2%
- Hispanic or Latino6.3%
- Other or two or more2.3%
- Black, not Hispanic0.2%
- Asian, not Hispanic0.0%
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 53103 earn?
Median household income is $137,083 (ACS 2020-2024), the 4th highest of the 26 ranked ZIP codes in Waukesha County. It is not measurably different from 2015-2019 ($111,914 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $137,083±$29,579
- Income per person
- $50,759
- Below the poverty line
- 1.7%
- Unemployed (of the labor force)
- 2.3%
- Adults 25+ with a bachelor's degree
- 42.7%
- Adjusted gross income per tax return, 2022
- $95,7391,970 returns; wages 67% 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 53103?
FHFA's house price index for 53103, built from repeat sales and appraisals of the same homes, rose 88% from 2015 to 2025 and rose 55% from 2020 to 2025, and moved +10.3% in 2025.
- Median home value (owners' estimate)
- $397,700
- Median gross rent
- $1,125
- Homes owned by their occupants
- 95.7%
- Housing units
- 1,632
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 53103?
128 business establishments had a location in this ZIP code in 2023, 3 fewer than in 2018; the most are in construction (ZIP Code Business Patterns).
- Construction28
- Other services (except public administration)18
- Manufacturing12
- Professional, scientific, and technical services11
- Wholesale trade10
- Retail trade8
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 53103?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 53150 | Muskego | 26,259 | $109k | 4.3 mi |
| 53185 | Waterford | 18,560 | $103k | 5.8 mi |
| 53189 | Waukesha | 26,855 | $117k | 5.8 mi |
| 53149 | Mukwonago | 19,614 | $111k | 6.3 mi |
| 53146 | New Berlin | 7,285 | $110k | 7.2 mi (near) |
| 53151 | New Berlin | 32,824 | $101k | 8.9 mi (near) |
| 53130 | Hales Corners | 7,712 | $87k | 9.5 mi (near) |
| 53127 | Genesee Depot | 79 | – | 9.8 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.