Residential delivery area · Wisconsin
ZIP Code 53548: Janesville, WI
ZIP code 53548 uses the postal name Janesville, Wisconsin and lies entirely in Rock County (Census 2020 ZIP-county file). About 20,000 people live there (Census Bureau, ACS 2020-2024), the least populous of Janesville's 3 residential ZIP codes. Median household income is $76,869 (Census Bureau, ACS 2020-2024). By Census place, 10% of its land lies in Janesville; 90% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Janesville · 3 residential ZIPs
- County
- Rock County
- Census places
- Janesville
- Metro area
- Janesville-Beloit, WI
- House districts
- WI-2 (80%), WI-1 (20%) 119th Congress, by share of land
- State
- Wisconsin
- Time zone
- Central
- Land area
- 75.0 sq mi · 266 people per sq mi
- PO Box ZIPs
- 53547 also use the name Janesville
Where is ZIP code 53548?
53548 centers on 42.689°, -89.131° and covers 75.0 square miles of land plus 1.2 of water. It borders 9 ZIP codes: 53537, 53545, 53501, 53576, 53536, 53546, 53511, 53534, 53520.
The map draws ZIP code areas only. For the streets inside 53548, 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 53548 compare with the rest of Janesville?
| Measure | 53548 | In Janesville | In Rock County | In WI |
|---|---|---|---|---|
| People (ACS 2020-2024) | 19,916 | 3rd of 3 | 5th of 20 | 106th of 783 |
| Median household income | $77k | 1st of 3 | 9th of 16 | 315th of 610 |
| Median home value | $235k | 2nd of 3 | 12th of 17 | 329th of 612 |
Its median household income is higher than in 58% of U.S. residential ZIP codes, and it is denser than 66% 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 53548?
The 2020 Census counted 19,233 people in 53548; the ACS, which samples households over 2020-2024, estimates 19,916. Between the 2010 and 2020 censuses its population grew 3.6% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 19,916
- 2020 Census count
- 19,233+3.6% since 2010 (18,558)
- Households
- 8,562
- Median age
- 43.3
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 53548?
Of the 19,916 people the ACS estimates in 53548, 19.1% are under 18 and 19.7% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (82.7%).
- Under 1819.1%
- 18 to 6461.1%
- 65 and older19.7%
- White, not Hispanic82.7%
- Hispanic or Latino8.4%
- Black, not Hispanic3.7%
- Other or two or more3.5%
- Asian, not Hispanic1.8%
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 53548 earn?
Median household income is $76,869 (ACS 2020-2024), the 9th highest of the 16 ranked ZIP codes in Rock County. It rose from $65,978 in 2015-2019 (in 2024 dollars), a change larger than the surveys' margins of error.
- Median household income
- $76,869
- Income per person
- $38,090
- Below the poverty line
- 10.6%
- Unemployed (of the labor force)
- 5.0%
- Adults 25+ with a bachelor's degree
- 26.4%
- Adjusted gross income per tax return, 2022
- $64,8099,280 returns; wages 71% 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 53548?
FHFA's house price index for 53548, built from repeat sales and appraisals of the same homes, rose 122% from 2015 to 2025 and rose 62% from 2020 to 2025, and moved +6.1% in 2025.
- Median home value (owners' estimate)
- $234,900
- Median gross rent
- $1,045
- Homes owned by their occupants
- 69.9%
- Housing units
- 9,038
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 53548?
294 business establishments had a location in this ZIP code in 2023, 23 more than in 2018; the most are in health care and social assistance (ZIP Code Business Patterns).
- Health care and social assistance36
- Retail trade35
- Construction34
- Other services (except public administration)33
- Professional, scientific, and technical services28
- Accommodation and food services26
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 53548?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 53537 | Footville | 752 | $60k | 4.2 mi |
| 53545 | Janesville | 24,703 | $74k | 5.7 mi |
| 53501 | Afton | 165 | – | 6.6 mi |
| 53576 | Orfordville | 2,131 | $64k | 6.8 mi |
| 53536 | Evansville | 9,547 | $88k | 8.5 mi |
| 53546 | Janesville | 29,867 | $76k | 9.6 mi |
| 53511 | Beloit | 48,701 | $67k | 10.0 mi |
| 53534 | Edgerton | 12,241 | $89k | 12.0 mi |
| 53520 | Brodhead | 6,687 | $75k | 13.2 mi |
| 53563 | Milton | 11,280 | $90k | 11.9 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.