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.

Oconomowoc Lake, WI Population, Income & Demographics 2026

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Demographics — 2024 ACS 5-Year Estimatesi

Census

Populationi

669

Median Agei

55.1

Race & Ethnicityi

White

80.9%541

Other

12.4%83

Hispanic/Latino

4.9%33

Asian

0.9%6

Two or More

0.9%6

Educational Attainment (Age 25+)i

High School Diploma

14.2%76

Some College (<1 yr)

3.2%17

Some College (1+ yr)

2.4%13

Associate's Degree

5.8%31

Bachelor's Degree

34.3%184

Master's Degree

27.6%148

Professional Degree

8.8%47

Doctorate

2.1%11

HS or Higher

98.3%

BA or Higher

72.8%

Graduate+

38.4%

Housingi

Median Home Valuei

$1,210,900

Median Renti

—

Tenure

Owner-Occupied

97.9%231

Renter-Occupied

2.1%5

Total Units

312

Homeownership

97.9%

Vacancy Rate

24.4%

Home Values

Under $50K

1.3%3

$100K–$150K

1.3%3

$200K–$300K

2.2%5

$300K–$500K

11.7%27

$500K–$1M

27.7%64

$1M+

55.8%129

Rent Distribution

$1,000–$1,250

$2,000+

Year Built

2020 or later

3.5%11

2010–2019

10.6%33

2000–2009

13.8%43

1990–1999

9.6%30

1980–1989

11.5%36

1970–1979

10.6%33

1960–1969

7.1%22

1950–1959

8.3%26

1940–1949

10.6%33

1939 or earlier

14.4%45

Heating Fuel

Utility Gas

89%210

Electricity

6.8%16

Bottled/LP Gas

4.2%10

Economyi

Median Household Incomei

$250,000+

Mean Household Incomei

$337,728

Per Capita Incomei

$125,485

Poverty Ratei

3.6%

Unemploymenti

Labor Forcei

420

Household Income Distribution

Under $10K

3%7

$10K–$15K

0.8%2

$20K–$25K

1.3%3

$30K–$35K

2.1%5

$35K–$40K

0.4%1

$45K–$50K

1.3%3

$50K–$60K

1.3%3

$60K–$75K

3.8%9

$75K–$100K

4.2%10

$100K–$125K

5.9%14

$125K–$150K

6.8%16

$150K–$200K

9.3%22

$200K+

59.7%141

Ancestry & Heritage

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

Foreign-Born Populationi

Foreign-Borni

395.8%

By Region

Top Countries

Germany

United Kingdom

China

Guatemala

Commute & Transportationi

Workersi

414

Avg. Commutei

23.1 min

How People Get to Work

Travel Time to Work

Workforce

Total Employed

416

Occupations

Industries

Social Characteristicsi

Marital Status (15+)i

Veteransi

22(3.9% of civilian adults)

Health Insurancei

99.3%Insured

0.7%Uninsured