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.

Sun Prairie, WI Population, Income & Demographics 2026

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Demographics — 2024 ACS 5-Year Estimatesi

Census

Populationi

37,570

Median Agei

36.7

Race & Ethnicityi

White

73.2%27,491

Asian

8.6%3,242

Black

8.5%3,181

Hispanic/Latino

4.7%1,766

Two or More

4.4%1,658

Other

0.4%162

Native Hawaiian/Pacific Islander

0.2%70

Educational Attainment (Age 25+)i

GED/Alternative

2.8%721

High School Diploma

17.1%4,343

Some College (<1 yr)

6.4%1,620

Some College (1+ yr)

11.8%2,986

Associate's Degree

8.2%2,076

Bachelor's Degree

33.3%8,447

Master's Degree

13.7%3,482

Professional Degree

2.2%545

Doctorate

1.7%424

HS or Higher

97.3%

BA or Higher

50.9%

Graduate+

17.6%

Housingi

Median Home Valuei

$365,700

Median Renti

$1,419

Tenure

Owner-Occupied

60.8%9,665

Renter-Occupied

39.2%6,222

Total Units

16,195

Homeownership

60.8%

Vacancy Rate

1.9%

Home Values

Under $50K

1.4%137

$50K–$100K

0%3

$100K–$150K

0.7%63

$150K–$200K

3.5%336

$200K–$300K

24.9%2,406

$300K–$500K

54.2%5,242

$500K–$1M

15.3%1,478

Rent Distribution

Under $500

160

$500–$750

$750–$1,000

553

$1,000–$1,250

1,331

$1,250–$1,500

1,379

$1,500–$2,000

1,871

$2,000+

755

Year Built

2020 or later

2.8%454

2010–2019

21.6%3,496

2000–2009

24.7%4,003

1990–1999

16.9%2,729

1980–1989

6.3%1,024

1970–1979

9.5%1,533

1960–1969

7.7%1,243

1950–1959

4.8%771

1940–1949

2.3%380

1939 or earlier

3.5%562

Heating Fuel

Utility Gas

71.4%11,351

Electricity

24.8%3,933

Bottled/LP Gas

2%315

No Fuel

0.8%127

Other

0.6%94

Fuel Oil

0.2%38

Wood

0.2%29

Economyi

Median Household Incomei

$90,942

Mean Household Incomei

$111,947

Per Capita Incomei

$47,609

Poverty Ratei

6.1%

Unemploymenti

2.3%

Labor Forcei

21,153

Household Income Distribution

Under $10K

2.1%326

$10K–$15K

1.1%180

$15K–$20K

2.3%360

$20K–$25K

2.2%346

$25K–$30K

2.1%337

$30K–$35K

3.1%496

$35K–$40K

4%632

$40K–$45K

3%476

$45K–$50K

3%474

$50K–$60K

5%800

$60K–$75K

14.8%2,355

$75K–$100K

12.8%2,038

$100K–$125K

11.7%1,866

$125K–$150K

7.9%1,249

$150K–$200K

10.2%1,617

$200K+

14.7%2,335

Federally Subsidized Housingi

HUD

The federal government helps low-income families, seniors, and people with disabilities afford housing through several programs. Residents typically pay about 30% of their income toward rent, with the government covering the rest. This data shows how many households in this community receive that assistance.

Subsidized Homesi

456

Residentsi

898

Avg. Tenant Renti

$540/mo

Avg. Waitlisti

16 months

Programs in this community

Public Housing29 homes90% occupied$633/mo rent

Government-owned housing managed by local housing authorities

Housing Choice Vouchers259 homes74% occupied$592/mo rent

Rental vouchers (Section 8) that help tenants pay for private-market housing

Project Based Section 8150 homes95% occupied$433/mo rent

Privately owned apartments with rent subsidies tied to the building

Household Incomei

Based on area median of $90,942/yr

Extremely low incomeUnder $27K/yr

77.6%

Very low income$27K–$45K/yr

19.8%

Low income$45K–$73K/yr

2.6%

Who Receives This Housing

86.6% of subsidized households are headed by a single mother

52.1% of subsidized households are minority

20.3% of subsidized households include someone with a disability

35.2% of subsidized households include a senior (62+)

Social Characteristicsi

Marital Status (15+)i

Veteransi

1,711(6.1% of civilian adults)