53548 ZIP Code — Janesville, WI

Rock County, Wisconsin

ZIP code 53548 is located in Janesville, Wisconsin, within Rock County. It covers approximately 74.98 square miles and serves a population of 20,119 residents. This is a standard ZIP code in the Central (CT) timezone, served by area code 608.

About ZIP code 53548

The housing stock consists of predominantly single-family detached homes. Most homes were built in the pre-1940, giving the area an established character. Median home value is $197,300. Owner-occupancy sits near the national average at 67%.

Median household income is $70,082. 36% of households receive Social Security income, suggesting a notable retiree or disability population.

The dominant occupation class is management, business, and professional, with education and healthcare as the leading industry. The average commute of 21 minutes is near the national average.

Educational attainment is near the national average, with 24% of residents holding a bachelor's degree or higher.

Health indicators show elevated rates of smoking (21%) compared to national benchmarks.

20,119

population

74.98

sq mi land

Standard

ZIP type

Central (CT)

timezone

53548 ZIP code map

Cities in ZIP code 53548

Below are the cities the US Postal Service accepts for ZIP code 53548. Using any city not on this list may result in mail delivery delays.

City	Status
Janesville	Preferred

Nearby ZIP codes

53545 Janesville (4.8 mi) 53576 Orfordville (7.1 mi) 53536 Evansville (7.8 mi) 53511 Beloit (9.5 mi) 53546 Janesville (9.7 mi) 53534 Edgerton (11.1 mi) 53563 Milton (11.9 mi) 53520 Brodhead (12.7 mi) 53505 Avalon (15.5 mi) 53525 Clinton (15.8 mi) 53502 Albany (16.1 mi) 53521 Brooklyn (16.2 mi)

Demographics updated 05/2026

Population
Total population	20,119
Population density	268 / sq mi
State FIPS	55
County FIPS	105

Geography
Land area	74.98 sq mi
Water area	1.17 sq mi
Latitude	42.6945
Longitude	-89.1319
Timezone	Central (CT)
Area code	608

Total population by age

Gender

Race & ethnicity

Economics updated 05/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	45.9%	42.6%	39.4%
$50k – $100k	31.7%	34.1%	33.0%
$100k – $200k	20.4%	20.6%	22.4%
Over $200k	2.0%	2.7%	5.2%

Demographics & statistics

20,119

Population

268

People per sq mi

40.4

Median age

$70,082

Median household income

$33,165

Per capita income

$197,300

Median home value

$987

Median monthly rent

67.3%

Home ownership

11.8%

Poverty rate

5.0%

Unemployment

6,032

Housing units

24.4%

Bachelor's or higher

Age distribution

Male Female

519

Under 5

503

695

5–9

674

599

10–14

582

609

15–19

592

639

20–24

621

1,092

25–34

1,061

1,526

35–44

1,481

1,468

45–54

1,425

656

55–59

636

691

60–64

671

1,146

65–74

1,113

349

75–84

338

220

85+

213

← Male

Female →

Age summary

Group	Count	%
Under 18	4,341	21.6%
18 and over	15,778	78.4%
65 and over	3,379	16.8%
Median age	40.4 years

Race & ethnicity

White 86.1%

Two or more races 4.7%

Hispanic or Latino 3.6%

Black or African American 2.7%

Asian 1.5%

Other race 1.3%

American Indian / Alaska Native 0.1%

Group	Count	%
White	17,957	86.1%
Two or more races	988	4.7%
Hispanic or Latino	749	3.6%
Black or African American	571	2.7%
Asian	311	1.5%
Other race	265	1.3%
American Indian / Alaska Native	25	0.1%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	45.9%	42.6%	39.4%
$50k – $100k	31.7%	34.1%	33.0%
$100k – $200k	20.4%	20.6%	22.4%
Over $200k	2.0%	2.7%	5.2%

Under $10k 5.0%

$10k–$15k 2.9%

$15k–$25k 7.3%

$25k–$35k 7.0%

$35k–$50k 12.7%

$50k–$75k 19.7%

$75k–$100k 20.0%

$100k–$150k 15.6%

$150k–$200k 6.8%

$200k+ 3.1%

Range	% of households
Under $10k	5.0%
$10k–$15k	2.9%
$15k–$25k	7.3%
$25k–$35k	7.0%
$35k–$50k	12.7%
$50k–$75k	19.7%
$75k–$100k	20.0%
$100k–$150k	15.6%
$150k–$200k	6.8%
$200k+	3.1%
Median income	$70,082

Housing

Home values

Under $50k 4.0%

$50k–$100k 9.2%

$100k–$150k 18.4%

$150k–$200k 19.7%

$200k–$300k 21.9%

$300k–$500k 20.2%

$500k–$1M 6.3%

$1M+ 0.4%

Housing overview

Metric	Value
Median home value	$197,300
Median rent / month	$987
Owner occupied	67.3%
Renter occupied	32.7%
Vacant	5.0%
Single-family detached	73.3%
Large apartment buildings	3.5%
Mobile homes	2.7%
Median rooms	5.8
Avg household size (owned)	2.44

Year built

Era	%
2020 or later	1.7%
2010–2019	4.0%
2000–2009	6.8%
1990–1999	12.4%
1980–1989	6.2%
1970–1979	12.1%
1960–1969	15.3%
1950–1959	7.6%
1940–1949	9.4%
1939 or earlier	24.6%

Bedrooms

Size	% of units
No bedroom (studio)	0.5%
1 bedroom	7.4%
2 bedrooms	27.0%
3 bedrooms	48.0%
4 bedrooms	12.2%
5+ bedrooms	4.9%

Vehicles per household

Vehicles	% of households
No vehicle	5.7%
1 vehicle	26.7%
2 vehicles	42.2%
3 or more	25.5%

Heating fuel

Fuel type	%
Utility gas	74.6%
Electricity	14.6%
Propane / LP gas	6.7%
Fuel oil	1.2%
Wood	1.3%
Solar	0.1%
No fuel used	0.8%

Households & families

Household type	Count	%
Married-couple family	4,010	48.2%
Cohabiting couple	613	7.4%
Male householder, no spouse	1,684	20.3%
Female householder, no spouse	2,007	24.1%
Households with children under 18	2,374	28.6%
Households with seniors (65+)	2,496	30.0%
Average household size	2.40

Marital status

Status	Male	Female
Never married	34.6%	26.6%
Married	49.1%	49.7%
Separated	0.7%	2.5%
Widowed	2.6%	6.4%
Divorced	13.0%	14.9%

Education

Less than 9th grade 2.2%

Some HS, no diploma 4.9%

HS graduate 36.2%

Some college, no degree 19.0%

Associate's degree 13.3%

Bachelor's degree 15.5%

Graduate / professional 8.9%

Metric	%
HS diploma or higher	92.9%
Bachelor's or higher	24.4%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	232	5.0%
Kindergarten	199	4.3%
Elementary school	1,926	41.2%
High school	1,072	23.0%
College / grad school	1,242	26.6%

Employment

Industry of employment

Education & healthcare 22.1%

Manufacturing 21.1%

Retail trade 12.4%

Arts, food & hospitality 10.2%

Professional & management 5.6%

Finance & real estate 4.9%

Construction 4.8%

Transportation & utilities 4.4%

Wholesale trade 4.0%

Public administration 3.9%

Other services 3.8%

Agriculture & mining 1.9%

Information 0.9%

Occupation

Category	%
Management, business & arts	31.4%
Service	18.6%
Sales & office	18.3%
Natural resources & construction	8.9%
Production & transportation	22.8%

Employment type

Type	%
Private sector	83.4%
Government	12.3%
Self-employed	4.1%
Unpaid family workers	0.2%

Commute

Method	%
Drive alone	77.9%
Carpool	9.9%
Public transit	1.0%
Walk	1.5%
Work from home	7.3%
Other means	2.4%
Avg commute (minutes)	20.9

Poverty

All people 11.8%

Under 18 years 17.7%

18 and over 10.2%

Married-couple families 1.8%

Female-led households 34.6%

Income support

Source	% of households
Social Security	35.7%
Retirement income	27.7%
Supplemental Security	5.3%
Cash public assistance	2.6%
Food stamps / SNAP	16.5%

Health indicators

Condition	%
Obesity	36.0%
High blood pressure	30.1%
High cholesterol	31.9%
Diabetes	9.3%
Heart disease	5.9%
Stroke	2.9%
Asthma	10.4%
Arthritis	23.4%
Kidney disease	2.8%
Pulmonary disease	6.7%
Cancer	6.2%

Behavior / access	%
Smoking	20.6%
Binge drinking	23.2%
No physical activity	23.1%
Less than 7 hrs sleep	31.5%
Depression	21.6%
Fair or poor health	13.5%
Poor mental health	14.6%
Poor physical health	10.6%
No health insurance	12.1%
Visited doctor (checkup)	70.7%
Visited dentist	66.5%
Cholesterol screening	85.3%
Teeth loss	13.8%

Veterans & disability

Veterans	Count	%
Civilian veterans	1,054	6.7%

Disability	%
Any disability	14.4%
Under 18	7.3%
18–64 years	11.4%
65 and over	34.6%

Health insurance coverage

Type	%
Private insurance	73.4%
Public insurance	38.2%
No insurance	6.4%
Uninsured under 19	4.7%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	19,097	94.9%
Spanish	291	1.5%
Other Indo-European	198	1.0%
Asian & Pacific Islander	36	0.2%
Other languages	49	0.3%

Place of birth & citizenship

Origin	Count	%
Native born (US)	19,304	95.9%
Born in same state	19,238	95.6%
Born in different state	14,608	72.6%
Foreign born	66	0.3%
Naturalized citizen	815	4.1%
Not a US citizen	399	49.0%

Ancestry

Ancestry	Count	%
Italian	3,669	18.2%
Polish	2,363	11.7%
French	1,778	8.8%
Arab	515	2.6%
English	226	1.1%

Ancestry	Count	%
Dutch	216	1.1%
Norwegian	81	0.4%
German	62	0.3%
Irish	43	0.2%

Technology access

Metric	% of households
Computer access	41.3%
Internet access	93.4%

Source: U.S. Census Bureau, American Community Survey 2025 estimates.

Frequently asked questions about ZIP code 53548

What city is ZIP code 53548 in?

ZIP code 53548 is primarily assigned to Janesville, Wisconsin.

What county is ZIP code 53548 in?

ZIP code 53548 falls within Rock County, Wisconsin.

Does ZIP code 53548 have a large retiree population?

36% of households in ZIP code 53548 receive Social Security income, suggesting a significant retiree or disability population.

What is the population of ZIP code 53548?

ZIP code 53548 has an estimated population of 20,119 residents, with a density of 268 people per square mile.

What is the typical home value in ZIP code 53548?

The median home value in ZIP code 53548 is $197,300.

What is the median household income in ZIP code 53548?

The median household income in ZIP code 53548 is $70,082, below the national median of ~$75,000.

What timezone is ZIP code 53548 in?

ZIP code 53548 observes the CST timezone.