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.

Third Lake, IL Population, Income & Demographics 2026

CSAChicago-Naperville MSAChicago-Naperville-Elgin#42/303 Income

Showing latest census year. Full demographic history available with a paid plan. View plans →

Demographics — 2024 ACS 5-Year Estimatesi

Census

Populationi

1,137

Median Agei

52.2

Race & Ethnicityi

White

82.2%935

Hispanic/Latino

11.7%133

Two or More

3.4%39

Asian

2.2%25

Other

0.4%4

Black

0.1%1

Educational Attainment (Age 25+)i

GED/Alternative

0.5%4

High School Diploma

8%69

Some College (<1 yr)

3.7%32

Some College (1+ yr)

10%86

Associate's Degree

7.5%65

Bachelor's Degree

39.2%338

Master's Degree

15.8%136

Professional Degree

3.2%28

Doctorate

10.9%94

HS or Higher

98.7%

BA or Higher

69.1%

Graduate+

29.9%

Housingi

Median Home Valuei

$361,500

Median Renti

—

Tenure

Owner-Occupied

99.1%459

Renter-Occupied

0.9%4

Total Units

481

Homeownership

99.1%

Vacancy Rate

3.7%

Home Values

Under $50K

0.4%2

$100K–$150K

0.4%2

$200K–$300K

19.4%89

$300K–$500K

67.3%309

$500K–$1M

11.5%53

$1M+

0.9%4

Rent Distribution

$1,000–$1,250

Year Built

2010–2019

1%5

2000–2009

0.8%4

1990–1999

10.6%51

1980–1989

72.8%350

1970–1979

2.5%12

1960–1969

1.2%6

1950–1959

4.8%23

1940–1949

0.6%3

1939 or earlier

5.6%27

Heating Fuel

Utility Gas

95%440

Bottled/LP Gas

3%14

Electricity

1.9%9

Economyi

Median Household Incomei

$150,139

Mean Household Incomei

$166,716

Per Capita Incomei

$67,094

Poverty Ratei

Unemploymenti

2.3%

Labor Forcei

613

Household Income Distribution

$20K–$25K

0.6%3

$35K–$40K

2.6%12

$40K–$45K

1.5%7

$45K–$50K

0.6%3

$50K–$60K

3%14

$60K–$75K

6.9%32

$75K–$100K

13.8%64

$100K–$125K

11.2%52

$125K–$150K

9.5%44

$150K–$200K

24.8%115

$200K+

25.3%117

Commute & Transportationi

Workersi

599

Avg. Commutei

29.8 min

How People Get to Work

Travel Time to Work

Workforce

Total Employed

599

Occupations

Industries

Social Characteristicsi

Marital Status (15+)i

Veteransi

41(4.2% of civilian adults)