Jefferson County, WI ZIP Codes
Wisconsin (WI) · 10 ZIP codes · 10 cities
10
ZIP codes
84,943
population (2021)
+1.5%
pop change since 2010
55055
FIPS code
Jefferson County ZIP code map
About Jefferson County
Jefferson County is located in Wisconsin and contains 10 ZIP codes across 10 cities and communities.
The county's population was 84,943 as of 2021,
an increase of
1.5% from 83,686 in 2010.
The timezone is Mountain Time (observes DST).
The Federal Information Processing System (FIPS) code for Jefferson County is 55055.
| Population | |
|---|---|
| 2021 population | 84,943 |
| 2010 population | 83,686 |
| Change | +1.5% |
| County details | |
|---|---|
| State | Wisconsin |
| FIPS code | 55055 |
| Timezone | Mountain |
| Daylight saving | Yes |
Cities in Jefferson County
Fort Atkinson
Helenville
Ixonia
Jefferson
Johnson Creek
Lake Mills
Palmyra
Sullivan
Waterloo
Watertown
ZIP codes for Jefferson County, WI (10)
| ZIP code | City | County | Map |
|---|---|---|---|
| 53036 | Ixonia | Jefferson | View map |
| 53038 | Johnson Creek | Jefferson | View map |
| 53094 | Watertown | Jefferson | View map |
| 53137 | Helenville | Jefferson | View map |
| 53156 | Palmyra | Jefferson | View map |
| 53178 | Sullivan | Jefferson | View map |
| 53538 | Fort Atkinson | Jefferson | View map |
| 53549 | Jefferson | Jefferson | View map |
| 53551 | Lake Mills | Jefferson | View map |
| 53594 | Waterloo | Jefferson | View map |
Demographics & statistics
76,555
Population
42.2
Median age
$77,611
Median household income
$39,239
Per capita income
$262,350
Median home value
$980
Median monthly rent
76.6%
Home ownership
7.3%
Poverty rate
2.9%
Unemployment
24,721
Housing units
27.8%
Bachelor's or higher
Age distribution
Male
Female
1,920
Under 5
1,807
2,398
5–9
2,258
2,312
10–14
2,177
2,586
15–19
2,435
2,253
20–24
2,120
4,501
25–34
4,236
5,164
35–44
4,860
5,325
45–54
5,013
2,941
55–59
2,768
2,954
60–64
2,780
4,415
65–74
4,155
2,054
75–84
1,934
612
85+
577
← Male
Female →
Age summary
| Group | Count | % |
|---|---|---|
| Under 18 | 16,040 | 20.4% |
| 18 and over | 60,515 | 79.7% |
| 65 and over | 13,747 | 18.5% |
| Median age | 42.2 years | |
Race & ethnicity
White
87%
Hispanic or Latino
4.8%
Two or more races
4.3%
Other race
2.4%
Black or African American
0.6%
Asian
0.5%
American Indian / Alaska Native
0.3%
| Group | Count | % |
|---|---|---|
| White | 70,021 | 87% |
| Hispanic or Latino | 3,894 | 4.8% |
| Two or more races | 3,486 | 4.3% |
| Other race | 1,954 | 2.4% |
| Black or African American | 454 | 0.6% |
| Asian | 391 | 0.5% |
| American Indian / Alaska Native | 224 | 0.3% |
Household income
Under $10k
3.0%
$10k–$15k
2.6%
$15k–$25k
5.0%
$25k–$35k
6.2%
$35k–$50k
10.7%
$50k–$75k
18.2%
$75k–$100k
13.8%
$100k–$150k
24.2%
$150k–$200k
10.6%
$200k+
5.8%
| Range | % of households |
|---|---|
| Under $10k | 3.0% |
| $10k–$15k | 2.6% |
| $15k–$25k | 5.0% |
| $25k–$35k | 6.2% |
| $35k–$50k | 10.7% |
| $50k–$75k | 18.2% |
| $75k–$100k | 13.8% |
| $100k–$150k | 24.2% |
| $150k–$200k | 10.6% |
| $200k+ | 5.8% |
| Median income | $77,611 |
Housing
Home values
Under $50k
5.9%
$50k–$100k
2.0%
$100k–$150k
7.5%
$150k–$200k
15.6%
$200k–$300k
30.3%
$300k–$500k
28.0%
$500k–$1M
8.7%
$1M+
2.1%
Housing overview
| Metric | Value |
|---|---|
| Median home value | $262,350 |
| Median rent / month | $980 |
| Owner occupied | 76.6% |
| Renter occupied | 23.4% |
| Vacant | 5.3% |
| Single-family detached | 75.0% |
| Large apartment buildings | 1.9% |
| Mobile homes | 4.3% |
| Median rooms | 6.1 |
| Avg household size (owned) | 2.58 |
Year built
| Era | % |
|---|---|
| 2020 or later | 0.3% |
| 2010–2019 | 5.6% |
| 2000–2009 | 14.6% |
| 1990–1999 | 15.2% |
| 1980–1989 | 6.7% |
| 1970–1979 | 12.7% |
| 1960–1969 | 7.7% |
| 1950–1959 | 8.1% |
| 1940–1949 | 2.9% |
| 1939 or earlier | 26.2% |
Bedrooms
| Size | % of units |
|---|---|
| No bedroom (studio) | 0.6% |
| 1 bedroom | 7.4% |
| 2 bedrooms | 23.2% |
| 3 bedrooms | 46.5% |
| 4 bedrooms | 19.1% |
| 5+ bedrooms | 3.2% |
Vehicles per household
| Vehicles | % of households |
|---|---|
| No vehicle | 3.1% |
| 1 vehicle | 24.9% |
| 2 vehicles | 43.6% |
| 3 or more | 28.3% |
Heating fuel
| Fuel type | % |
|---|---|
| Utility gas | 57.8% |
| Electricity | 16.7% |
| Propane / LP gas | 16.5% |
| Fuel oil | 3.0% |
| Wood | 4.5% |
| No fuel used | 0.4% |
Households & families
| Household type | Count | % |
|---|---|---|
| Married-couple family | 16,054 | 55.2% |
| Cohabiting couple | 2,666 | 8.4% |
| Male householder, no spouse | 5,564 | 18.0% |
| Female householder, no spouse | 6,559 | 18.4% |
| Households with children under 18 | 8,423 | 27.5% |
| Households with seniors (65+) | 9,710 | 31.8% |
| Average household size | 2.47 | |
Marital status
| Status | Male | Female |
|---|---|---|
| Never married | 31.5% | 24.5% |
| Married | 55.3% | 55.3% |
| Separated | 0.4% | 1.1% |
| Widowed | 3.3% | 7.6% |
| Divorced | 9.6% | 11.6% |
Education
Less than 9th grade
2.2%
Some HS, no diploma
4.0%
HS graduate
34.1%
Some college, no degree
20.7%
Associate's degree
11.1%
Bachelor's degree
20.0%
Graduate / professional
7.9%
| Metric | % |
|---|---|
| HS diploma or higher | 93.7% |
| Bachelor's or higher | 27.8% |
School enrollment (ages 3–17)
| Type | Count | % |
|---|---|---|
| Nursery / preschool | 1,010 | 7.6% |
| Kindergarten | 935 | 6.3% |
| Elementary school | 7,000 | 42.0% |
| High school | 3,929 | 24.9% |
| College / grad school | 3,431 | 19.3% |
Employment
Industry of employment
Education & healthcare
20.8%
Manufacturing
20.7%
Retail trade
10.4%
Professional & management
8.6%
Construction
8.4%
Arts, food & hospitality
6.3%
Finance & real estate
5.4%
Other services
5.3%
Transportation & utilities
4.1%
Public administration
3.4%
Agriculture & mining
2.7%
Wholesale trade
2.5%
Information
1.5%
Occupation
| Category | % |
|---|---|
| Management, business & arts | 35.3% |
| Service | 15.5% |
| Sales & office | 16.9% |
| Natural resources & construction | 12.3% |
| Production & transportation | 20.1% |
Employment type
| Type | % |
|---|---|
| Private sector | 81.9% |
| Government | 11.6% |
| Self-employed | 6.1% |
| Unpaid family workers | 0.4% |
Commute
| Method | % |
|---|---|
| Drive alone | 79.0% |
| Carpool | 8.0% |
| Public transit | 0.4% |
| Walk | 3.2% |
| Other means | 1.0% |
| Avg commute (minutes) | 27.2 |
Poverty
All people
7.3%
Under 18 years
9.7%
18 and over
6.6%
Married-couple families
3.1%
Female-led households
16.0%
Income support
| Source | % of households |
|---|---|
| Social Security | 34.1% |
| Retirement income | 24.0% |
| Supplemental Security | 3.6% |
| Cash public assistance | 1.6% |
| Food stamps / SNAP | 7.2% |
Health indicators
| Condition | % |
|---|---|
| High blood pressure | 28.8% |
| High cholesterol | 32.1% |
| Heart disease | 5.6% |
| Stroke | 2.6% |
| Asthma | 9.6% |
| Arthritis | 23.6% |
| Kidney disease | 2.6% |
| Pulmonary disease | 5.7% |
| Cancer | 6.6% |
| Behavior / access | % |
|---|---|
| Binge drinking | 26.1% |
| No physical activity | 19.6% |
| Less than 7 hrs sleep | 32.0% |
| Fair or poor health | 11.2% |
| Poor mental health | 13.4% |
| Poor physical health | 9.2% |
| No health insurance | 10.5% |
| Visited doctor (checkup) | 71.9% |
| Visited dentist | 69.0% |
| Cholesterol screening | 87.4% |
| Teeth loss | 10.9% |
Veterans & disability
| Veterans | Count | % |
|---|---|---|
| Civilian veterans | 4,171 | 7.1% |
| Disability | % |
|---|---|
| Any disability | 11.6% |
| Under 18 | 3.8% |
| 18–64 years | 9.7% |
| 65 and over | 26.4% |
Health insurance coverage
| Type | % |
|---|---|
| Private insurance | 80.3% |
| Public insurance | 30.9% |
| Uninsured under 19 | 1.5% |
Language & origin
Language spoken at home (age 5+)
| Language | Count | % |
|---|---|---|
| English only | 72,828 | 94.9% |
| Spanish | 1,427 | 1.5% |
| Other Indo-European | 1,086 | 1.0% |
| Asian & Pacific Islander | 224 | 0.2% |
| Other languages | 104 | 0.2% |
Place of birth & citizenship
| Origin | Count | % |
|---|---|---|
| Native born (US) | 74,276 | 97.6% |
| Born in same state | 73,824 | 96.9% |
| Born in different state | 58,438 | 78.7% |
| Foreign born | 452 | 0.7% |
| Naturalized citizen | 2,279 | 2.4% |
| Not a US citizen | 836 | 42.5% |
Ancestry
| Ancestry | Count | % |
|---|---|---|
| Italian | 8,550 | 11.2% |
| Polish | 5,062 | 6.6% |
| French | 5,033 | 6.6% |
| Arab | 2,683 | 3.5% |
| English | 766 | 1% |
| Ancestry | Count | % |
|---|---|---|
| German | 414 | 0.5% |
| Dutch | 381 | 0.5% |
| Irish | 225 | 0.3% |
| Norwegian | 213 | 0.3% |
Technology access
| Metric | % of households |
|---|---|
| Computer access | 40.2% |
| Internet access | 93.1% |
Source: U.S. Census Bureau, American Community Survey 2025 estimates.
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