Where does this demographic data come from?

All demographic data comes from the U.S. Census Bureau's American Community Survey (ACS) 5-Year Estimates, which samples about 3.5 million households annually. The 5-year estimates provide the most reliable data for small geographies like municipalities.

What is the difference between Census data and ACS data?

The decennial Census (conducted every 10 years) is a full population count focusing on basic demographics. The ACS is an ongoing survey that collects detailed data on income, education, housing, commute patterns, and more. ACS data is updated annually but represents averages over a 5-year period.

How accurate is this data for small towns?

For smaller municipalities, ACS estimates have wider margins of error because fewer residents are sampled. The 5-year estimates reduce this uncertainty by averaging over a longer period. For towns under 5,000 people, treat specific numbers as approximations rather than precise counts.

Sullivan, WI Population, Income & Demographics 2026

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Demographics — 2024 ACS 5-Year Estimatesi

Census

Populationi

663

Median Agei

42.6

Race & Ethnicityi

White

95.5%633

Two or More

2.9%19

Hispanic/Latino

0.9%6

American Indian/Alaska Native

0.3%2

Other

0.3%2

Asian

0.2%1

Educational Attainment (Age 25+)i

GED/Alternative

3.9%18

High School Diploma

33.2%153

Some College (<1 yr)

13.9%64

Some College (1+ yr)

14.1%65

Associate's Degree

9.1%42

Bachelor's Degree

12.8%59

Master's Degree

3%14

Professional Degree

0.7%3

HS or Higher

90.7%

BA or Higher

16.5%

Graduate+

3.7%

Housingi

Median Home Valuei

$257,400

Median Renti

$1,160

Tenure

Owner-Occupied

44.2%121

Renter-Occupied

55.8%153

Total Units

282

Homeownership

44.2%

Vacancy Rate

2.8%

Home Values

$100K–$150K

7.4%9

$150K–$200K

19.8%24

$200K–$300K

34.7%42

$300K–$500K

35.5%43

$500K–$1M

2.5%3

Economyi

Median Household Incomei

$71,250

Mean Household Incomei

$85,542

Per Capita Incomei

$38,727

Poverty Ratei

27%

Unemploymenti

1.2%

Labor Forcei

328

Household Income Distribution

Under $10K

8.4%23

$10K–$15K

8.8%24

$15K–$20K

4.4%12

$20K–$25K

4%11

$25K–$30K

2.2%6

$30K–$35K

4.7%13

$35K–$40K

0.4%1

$40K–$45K

2.6%7

$45K–$50K

0.7%2

$50K–$60K

6.6%18

$60K–$75K

8.4%23

$75K–$100K

14.6%40

$100K–$125K

15%41

$125K–$150K

6.6%18

$150K–$200K

7.7%21

$200K+

5.1%14

Ancestry & Heritage

Self-reported ancestry groups. Residents may report multiple ancestries, so totals may exceed 100%.

Foreign-Born Populationi

Foreign-Borni

101.5%

By Region

Top Countries

United Kingdom

China

Commute & Transportationi

Workersi

321

Avg. Commutei

28.9 min

How People Get to Work

Travel Time to Work

Workforce

Total Employed

324

Occupations

Industries

Social Characteristicsi

Marital Status (15+)i

Veteransi

27(5.1% of civilian adults)

Health Insurancei

97.3%Insured

2.7%Uninsured