53178 ZIP Code — Sullivan, WI

Jefferson County, Wisconsin

ZIP code 53178 is located in Sullivan, Wisconsin, within Jefferson County. It covers approximately 31.86 square miles and serves a population of 2,749 residents. This is a standard ZIP code in the Central (CT) timezone, served by area code 262.

About ZIP code 53178

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 $304,700. Owner-occupancy sits near the national average at 72%.

Median household income is $87,625. The poverty rate of 6% is below the national average. 42% of households receive Social Security income, suggesting a notable retiree or disability population.

The dominant occupation class is management, business, and professional, with manufacturing as the leading industry. The average commute of 28 minutes is near the national average.

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

2,749

population

31.86

sq mi land

Standard

ZIP type

Central (CT)

timezone

53178 ZIP code map

Cities in ZIP code 53178

Below are the cities the US Postal Service accepts for ZIP code 53178. Using any city not on this list may result in mail delivery delays.

City	Status
Sullivan	Preferred

Nearby ZIP codes

53137 Helenville (3.6 mi) 53118 Dousman (6.9 mi) 53066 Oconomowoc (7.7 mi) 53549 Jefferson (8.4 mi) 53156 Palmyra (9.4 mi) 53094 Watertown (9.6 mi) 53094 Watertown (9.6 mi) 53036 Ixonia (10.3 mi) 53038 Johnson Creek (10.3 mi) 53069 Okauchee (10.6 mi) 53018 Delafield (10.8 mi) 53119 Eagle (11.1 mi)

Demographics updated 05/2026

Population
Total population	2,749
Population density	86 / sq mi
State FIPS	55
County FIPS	055

Geography
Land area	31.86 sq mi
Water area	1.05 sq mi
Latitude	43.0260
Longitude	-88.6025
Timezone	Central (CT)
Area code	262

Total population by age

Gender

Race & ethnicity

Economics updated 05/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	31.9%	37.2%	39.4%
$50k – $100k	35.7%	32.9%	33.0%
$100k – $200k	30.5%	26.4%	22.4%
Over $200k	1.9%	3.6%	5.2%

Demographics & statistics

2,749

Population

People per sq mi

49.0

Median age

$87,625

Median household income

$43,369

Per capita income

$304,700

Median home value

$892

Median monthly rent

71.9%

Home ownership

6.3%

Poverty rate

4.2%

Unemployment

833

Housing units

24.1%

Bachelor's or higher

Age distribution

Male Female

Under 5

5–9

10–14

15–19

20–24

137

25–34

126

218

35–44

200

186

45–54

170

139

55–59

127

119

60–64

108

241

65–74

221

75–84

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	463	16.8%
18 and over	2,286	83.2%
65 and over	620	22.6%
Median age	49.0 years

Race & ethnicity

White 97.4%

Two or more races 1.7%

Asian 0.4%

Hispanic or Latino 0.4%

American Indian / Alaska Native 0.1%

Other race 0.1%

Group	Count	%
White	2,686	97.4%
Two or more races	48	1.7%
Asian	11	0.4%
Hispanic or Latino	10	0.4%
American Indian / Alaska Native	2	0.1%
Other race	2	0.1%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	31.9%	37.2%	39.4%
$50k – $100k	35.7%	32.9%	33.0%
$100k – $200k	30.5%	26.4%	22.4%
Over $200k	1.9%	3.6%	5.2%

Under $10k 0.9%

$10k–$15k 3.8%

$15k–$25k 5.6%

$25k–$35k 5.2%

$35k–$50k 9.6%

$50k–$75k 16.2%

$75k–$100k 17.0%

$100k–$150k 26.0%

$150k–$200k 9.1%

$200k+ 6.5%

Range	% of households
Under $10k	0.9%
$10k–$15k	3.8%
$15k–$25k	5.6%
$25k–$35k	5.2%
$35k–$50k	9.6%
$50k–$75k	16.2%
$75k–$100k	17.0%
$100k–$150k	26.0%
$150k–$200k	9.1%
$200k+	6.5%
Median income	$87,625

Housing

Home values

Under $50k 9.0%

$50k–$100k 6.2%

$100k–$150k 2.2%

$150k–$200k 9.0%

$200k–$300k 22.7%

$300k–$500k 32.0%

$500k–$1M 17.7%

$1M+ 1.3%

Housing overview

Metric	Value
Median home value	$304,700
Median rent / month	$892
Owner occupied	71.9%
Renter occupied	28.1%
Vacant	4.7%
Single-family detached	74.7%
Large apartment buildings	1.8%
Mobile homes	9.7%
Median rooms	6.0
Avg household size (owned)	2.62

Year built

Era	%
2020 or later	0.0%
2010–2019	5.8%
2000–2009	8.1%
1990–1999	15.5%
1980–1989	8.3%
1970–1979	22.2%
1960–1969	6.3%
1950–1959	6.2%
1940–1949	2.1%
1939 or earlier	25.4%

Bedrooms

Size	% of units
No bedroom (studio)	1.2%
1 bedroom	12.7%
2 bedrooms	24.5%
3 bedrooms	48.5%
4 bedrooms	11.9%
5+ bedrooms	1.2%

Vehicles per household

Vehicles	% of households
No vehicle	0.5%
1 vehicle	19.4%
2 vehicles	42.2%
3 or more	38.0%

Heating fuel

Fuel type	%
Utility gas	46.4%
Electricity	19.5%
Propane / LP gas	14.2%
Fuel oil	5.5%
Wood	11.8%

Households & families

Household type	Count	%
Married-couple family	581	53.6%
Cohabiting couple	149	13.7%
Male householder, no spouse	232	21.4%
Female householder, no spouse	122	11.3%
Households with children under 18	226	20.8%
Households with seniors (65+)	431	39.8%
Average household size	2.54

Marital status

Status	Male	Female
Never married	30.1%	24.8%
Married	51.7%	54.7%
Separated	0.5%	0.7%
Widowed	7.5%	5.8%
Divorced	10.1%	14.0%

Education

Less than 9th grade 1.0%

Some HS, no diploma 5.4%

HS graduate 37.6%

Some college, no degree 20.0%

Associate's degree 12.0%

Bachelor's degree 18.5%

Graduate / professional 5.7%

Metric	%
HS diploma or higher	93.6%
Bachelor's or higher	24.1%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	13	2.9%
Kindergarten	30	6.6%
Elementary school	212	46.5%
High school	128	28.1%
College / grad school	73	16.0%

Employment

Industry of employment

Manufacturing 25.1%

Education & healthcare 18.8%

Retail trade 16.4%

Professional & management 9.4%

Construction 8.4%

Other services 6.5%

Transportation & utilities 3.8%

Arts, food & hospitality 3.2%

Finance & real estate 3.0%

Wholesale trade 2.0%

Public administration 1.8%

Information 0.8%

Agriculture & mining 0.7%

Occupation

Category	%
Management, business & arts	28.5%
Service	13.1%
Sales & office	21.1%
Natural resources & construction	15.3%
Production & transportation	22.0%

Employment type

Type	%
Private sector	86.2%
Government	7.6%
Self-employed	5.4%
Unpaid family workers	0.8%

Commute

Method	%
Drive alone	84.6%
Carpool	6.2%
Public transit	0.0%
Walk	2.2%
Work from home	6.4%
Other means	0.6%
Avg commute (minutes)	28.2

Poverty

All people 6.3%

Under 18 years 9.8%

18 and over 5.6%

Married-couple families 2.8%

Female-led households 15.1%

Income support

Source	% of households
Social Security	42.0%
Retirement income	27.7%
Supplemental Security	3.3%
Cash public assistance	1.0%
Food stamps / SNAP	7.0%

Health indicators

Condition	%
Obesity	37.0%
High blood pressure	30.6%
High cholesterol	32.8%
Diabetes	8.9%
Heart disease	6.0%
Stroke	2.8%
Asthma	9.6%
Arthritis	25.2%
Kidney disease	2.7%
Pulmonary disease	6.1%
Cancer	7.0%

Behavior / access	%
Smoking	17.9%
Binge drinking	25.6%
No physical activity	19.9%
Less than 7 hrs sleep	32.1%
Depression	21.0%
Fair or poor health	11.5%
Poor mental health	13.1%
Poor physical health	9.6%
No health insurance	9.7%
Visited doctor (checkup)	72.7%
Visited dentist	69.0%
Cholesterol screening	88.4%
Teeth loss	10.8%

Veterans & disability

Veterans	Count	%
Civilian veterans	128	5.6%

Disability	%
Any disability	18.7%
Under 18	3.7%
18–64 years	15.1%
65 and over	39.5%

Health insurance coverage

Type	%
Private insurance	78.2%
Public insurance	34.2%
No insurance	4.1%
Uninsured under 19	0.0%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	2,664	96.9%
Spanish	5	0.2%
Other Indo-European	0	0.0%
Asian & Pacific Islander	5	0.2%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	2,723	99.1%
Born in same state	2,719	98.9%
Born in different state	2,277	82.8%
Foreign born	4	0.1%
Naturalized citizen	26	0.9%
Not a US citizen	11	42.3%

Ancestry

Ancestry	Count	%
Italian	335	12.2%
French	195	7.1%
Polish	139	5.1%
Arab	108	3.9%

Ancestry	Count	%
German	22	0.8%
Dutch	15	0.5%
English	11	0.4%
Irish	8	0.3%

Technology access

Metric	% of households
Computer access	39.4%
Internet access	96.0%

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

Frequently asked questions about ZIP code 53178

What city is ZIP code 53178 in?

ZIP code 53178 is primarily assigned to Sullivan, Wisconsin.

What county is ZIP code 53178 in?

ZIP code 53178 falls within Jefferson County, Wisconsin.

Does ZIP code 53178 have a large retiree population?

42% of households in ZIP code 53178 receive Social Security income, suggesting a significant retiree or disability population.

What is the population of ZIP code 53178?

ZIP code 53178 has an estimated population of 2,749 residents, with a density of 86 people per square mile.

What is the typical home value in ZIP code 53178?

The median home value in ZIP code 53178 is $304,700.

What is the median household income in ZIP code 53178?

The median household income in ZIP code 53178 is $87,625, above the national median of ~$75,000.

What timezone is ZIP code 53178 in?

ZIP code 53178 observes the CST timezone.