Janesville ZIP Codes — Rock County, WI

There are 4 unique ZIP codes in Janesville, Wisconsin. Area code: 608.

ZIP codes

178.59

sq mi land

2.01

sq mi water

608

area code

Janesville, WI ZIP code map

About Janesville, WI

Janesville, Wisconsin, is a vibrant city located in Rock County. Known for its rich history and strong community spirit, it offers a blend of urban and rural lifestyles. Many residents enjoy the beautiful parks and historic sites scattered throughout the area.

Location & geography

Situated in south-central Wisconsin, Janesville is approximately 40 miles south of Madison and 80 miles southwest of Milwaukee. The city encompasses a total land area of 178.59 square miles, with an additional 2.01 square miles of water, including the scenic Rock River. The landscape features a mix of rolling hills and open spaces, making it ideal for outdoor activities.

Community & economy

The character of Janesville is defined by its friendly atmosphere and active community involvement. The economy is diverse, with industries ranging from manufacturing to retail and healthcare services. Daily life in Janesville includes a variety of local events, farmers' markets, and recreational opportunities that cater to residents and visitors alike.

Transportation

Janesville is serviced by several major highways, including Interstate 90/39, which provides easy access to other parts of Wisconsin and neighboring states. The nearest airport is the Southern Wisconsin Regional Airport, located about 15 miles northwest in Janesville. Public transit options also exist, making transportation within the city convenient.

History

Founded in the early 1830s, Janesville has grown significantly over the years, initially thriving due to its proximity to the Rock River. The city became a hub for the manufacturing of agricultural machinery and automobiles, contributing to its economic development. Notable events include the establishment of the first public school in 1855 and the growth of the city's historical districts.

Did you know?

One surprising fact about Janesville is that it was once home to the largest General Motors assembly plant, which operated for several decades. This industrial heritage has left a lasting impact on the community and its economy.

ZIP codes for Janesville, WI (4)

ZIP code	City	County	Map
53545	Janesville	Rock	View map
53546	Janesville	Rock	View map
53547	Janesville	Rock	View map
53548	Janesville	Rock	View map

Demographics & statistics

73,508

Population

40.7

Median age

$69,773

Median household income

$36,245

Per capita income

$193,400

Median home value

$996

Median monthly rent

68.4%

Home ownership

10.1%

Poverty rate

4.1%

Unemployment

22,583

Housing units

26.5%

Bachelor's or higher

Age distribution

Male Female

1,938

Under 5

1,961

2,354

5–9

2,381

2,246

10–14

2,272

2,071

15–19

2,096

2,224

20–24

2,250

4,617

25–34

4,672

4,968

35–44

5,027

4,741

45–54

4,796

2,448

55–59

2,477

2,611

60–64

2,641

3,618

65–74

3,660

1,803

75–84

1,824

901

85+

911

← Male

Female →

Age summary

Group	Count	%
Under 18	15,875	21.6%
18 and over	57,633	78.4%
65 and over	12,717	17.4%
Median age	40.7 years

Race & ethnicity

White 84.7%

Two or more races 4.5%

Hispanic or Latino 4.1%

Black or African American 2.9%

Other race 2.1%

Asian 1.6%

American Indian / Alaska Native 0.1%

Group	Count	%
White	64,890	84.7%
Two or more races	3,466	4.5%
Hispanic or Latino	3,139	4.1%
Black or African American	2,259	2.9%
Other race	1,593	2.1%
Asian	1,215	1.6%
American Indian / Alaska Native	83	0.1%

Household income

Under $10k 3.9%

$10k–$15k 3.4%

$15k–$25k 7.5%

$25k–$35k 6.7%

$35k–$50k 12.3%

$50k–$75k 20.2%

$75k–$100k 18.1%

$100k–$150k 16.6%

$150k–$200k 7.5%

$200k+ 3.8%

Range	% of households
Under $10k	3.9%
$10k–$15k	3.4%
$15k–$25k	7.5%
$25k–$35k	6.7%
$35k–$50k	12.3%
$50k–$75k	20.2%
$75k–$100k	18.1%
$100k–$150k	16.6%
$150k–$200k	7.5%
$200k+	3.8%
Median income	$69,773

Housing

Home values

Under $50k 4.1%

$50k–$100k 7.1%

$100k–$150k 16.3%

$150k–$200k 26.4%

$200k–$300k 26.7%

$300k–$500k 15.0%

$500k–$1M 4.0%

$1M+ 0.4%

Housing overview

Metric	Value
Median home value	$193,400
Median rent / month	$996
Owner occupied	68.4%
Renter occupied	31.6%
Vacant	3.8%
Single-family detached	69.1%
Large apartment buildings	6.2%
Mobile homes	2.6%
Median rooms	5.7
Avg household size (owned)	2.45

Year built

Era	%
2020 or later	0.8%
2010–2019	3.4%
2000–2009	7.9%
1990–1999	13.8%
1980–1989	9.4%
1970–1979	16.5%
1960–1969	16.0%
1950–1959	9.8%
1940–1949	5.4%
1939 or earlier	17.0%

Bedrooms

Size	% of units
No bedroom (studio)	1.3%
1 bedroom	7.6%
2 bedrooms	29.8%
3 bedrooms	45.8%
4 bedrooms	11.8%
5+ bedrooms	3.7%

Vehicles per household

Vehicles	% of households
No vehicle	5.9%
1 vehicle	32.2%
2 vehicles	40.1%
3 or more	21.9%

Heating fuel

Fuel type	%
Utility gas	72.9%
Electricity	19.9%
Propane / LP gas	4.5%
Fuel oil	0.8%
Wood	0.8%
No fuel used	0.4%

Households & families

Household type	Count	%
Married-couple family	14,007	45.2%
Cohabiting couple	2,636	8.3%
Male householder, no spouse	5,653	18.4%
Female householder, no spouse	8,867	28.1%
Households with children under 18	8,432	27.2%
Households with seniors (65+)	9,279	29.9%
Average household size	2.33

Marital status

Status	Male	Female
Never married	34.5%	27.6%
Married	50.3%	47.0%
Separated	0.9%	1.7%
Widowed	2.6%	9.1%
Divorced	11.6%	14.6%

Education

Less than 9th grade 1.7%

Some HS, no diploma 4.5%

HS graduate 34.0%

Some college, no degree 21.6%

Associate's degree 11.7%

Bachelor's degree 17.6%

Graduate / professional 8.8%

Metric	%
HS diploma or higher	93.8%
Bachelor's or higher	26.5%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	964	5.8%
Kindergarten	803	4.9%
Elementary school	6,980	42.6%
High school	3,901	24.2%
College / grad school	3,653	22.5%

Employment

Industry of employment

Education & healthcare 21.6%

Manufacturing 20.2%

Retail trade 12.7%

Arts, food & hospitality 8.8%

Professional & management 6.5%

Construction 6.1%

Transportation & utilities 5.5%

Wholesale trade 4.3%

Finance & real estate 4.3%

Other services 3.9%

Public administration 3.5%

Information 1.4%

Agriculture & mining 1.3%

Occupation

Category	%
Management, business & arts	32.7%
Service	16.1%
Sales & office	19.5%
Natural resources & construction	9.4%
Production & transportation	22.4%

Employment type

Type	%
Private sector	84.2%
Government	11.6%
Self-employed	4.0%
Unpaid family workers	0.2%

Commute

Method	%
Drive alone	81.3%
Carpool	8.8%
Public transit	0.8%
Walk	1.1%
Other means	1.3%
Avg commute (minutes)	21.6

Poverty

All people 10.1%

Under 18 years 14.7%

18 and over 8.8%

Married-couple families 2.2%

Female-led households 27.1%

Income support

Source	% of households
Social Security	34.1%
Retirement income	28.8%
Supplemental Security	4.2%
Cash public assistance	2.4%
Food stamps / SNAP	12.4%

Health indicators

Condition	%
High blood pressure	29.5%
High cholesterol	31.6%
Heart disease	5.8%
Stroke	2.8%
Asthma	10.0%
Arthritis	23.1%
Kidney disease	2.7%
Pulmonary disease	6.2%
Cancer	6.5%

Behavior / access	%
Binge drinking	23.3%
No physical activity	21.4%
Less than 7 hrs sleep	30.6%
Fair or poor health	12.1%
Poor mental health	13.9%
Poor physical health	9.8%
No health insurance	11.1%
Visited doctor (checkup)	71.0%
Visited dentist	69.3%
Cholesterol screening	86.3%
Teeth loss	12.2%

Veterans & disability

Veterans	Count	%
Civilian veterans	4,070	7.0%

Disability	%
Any disability	13.8%
Under 18	5.8%
18–64 years	11.6%
65 and over	31.7%

Health insurance coverage

Type	%
Private insurance	76.9%
Public insurance	35.4%
Uninsured under 19	2.8%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	69,609	94.7%
Spanish	1,447	2.0%
Other Indo-European	1,025	1.4%
Asian & Pacific Islander	283	0.4%
Other languages	104	0.2%

Place of birth & citizenship

Origin	Count	%
Native born (US)	71,006	96.6%
Born in same state	70,591	96.0%
Born in different state	53,056	72.3%
Foreign born	415	0.5%
Naturalized citizen	2,502	3.4%
Not a US citizen	1,210	48.5%

Ancestry

Ancestry	Count	%
Italian	11,103	15.1%
Polish	8,683	11.8%
French	7,222	9.8%
Arab	3,105	4.2%
English	1,095	1.5%

Ancestry	Count	%
Dutch	483	0.7%
German	267	0.4%
Irish	204	0.3%
Norwegian	191	0.3%

Technology access

Metric	% of households
Computer access	42.4%
Internet access	94.3%

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

Frequently asked questions

What ZIP codes does Janesville, WI have?

Janesville, WI has 3 ZIP codes: 53545, 53546, and 53548. Each ZIP code serves a distinct delivery area within the city and surrounding region.